DESC:TECHNICAL FIELD
[001] The embodiments herein generally relate to an engine radiator fan in a vehicle and more particularly, to a method for testing the radiator fan module under various environment conditions in a continuous testing cycle manner, one test product at a time involved in all testing process.

BACKGROUND
[002] Vehicles may include cooling systems configured to reduce overheating of an engine by transferring heat from the engine to ambient air. Therein, coolant is circulated through the engine block to remove heat from the hot engine block, and the heated coolant is then circulated through a radiator located near a front-end of the vehicle. Usually, the radiator fan and shroud assembly is tested for evaluating the performance of the radiator fan and shroud assembly (test product) so as to provide inputs for optimizing the test product at early stages of product development thereby saving cost and time. Conventional method practiced at supplier end for testing the proprietary radiator fan and shroud assembly (test product) includes continuous durability test, humidity test, thermal shock test and start-stop durability test in which different test products were tested in isolation under different climatic conditions for design validation plan (DVP) conformance. For example, in the conventional continuous durability test method, a first test product (radiator fan and shroud assembly) is kept in environment chamber at high temperature of 80 ±3 º C for 300 hours and continuously voltage applied to motor terminals for 14.5 ± 0.5 V. Current and fan speed for every 100 hours duration is measured and monitored at specified intervals. Further, with respect to conventional thermal shock test method, a second test product is kept in environment chamber at static condition and at a low temperature of - 40 ± 2 ºC for 4 hours and followed by high temperature of 80 ± 2 ºC for 4 hours. This test duration should be continued for 20 cycles. Further, with respect to conventional humidity test method, a third test product is kept in environment at static condition and at a high temperature of 80± 3 ºC and with relative humidity not less than 95% for 96 hours. The performance of the third test product is to be checked after this test for 1 minute time span. Furthermore, with respect to conventional start-stop durability test method, a fourth test product is kept in environment chamber as per vehicle mounting condition and at high temperature of 80± 2 ºC 13.5± 0.2 V and with a cycle time for 10 Minutes ON and 5 Minutes OFF for test duration of 1000 hours. Thus, a single test product is not involved in all conventional testing process at a time.
[003] The probability of accelerated test results may meet the design criteria based on the product and process quality. As per the conventional DVP, entire geographical and environmental conditions were not being experienced at both component and vehicle level due to the limitation on testing duration and cost budgeted for this development case. On real testing grounds (real world user profile), the vehicle is subjected to travel under different road, climate and speed conditions, by which multi-environment and terrain regions were significant factors for causes of field failures.
[004] Therefore, there exists a need for a method for testing radiator fan module, which obviates the aforementioned drawbacks.

OBJECTS
[005] The principal object of an embodiment herein is to provide a method for testing radiator fan module under various environment conditions (hot, cold, humid and ambient temperature conditions) in a continuous testing cycle manner, one test product at a time involved in all testing process.
[006] Another object of an embodiment herein is to merge all the four isolated tests into single design validation plan (DVP) test thereby simulating real world user or customer profile through this test method.
[007] Another object of an embodiment herein is to provide the method for testing radiator fan module at cross-combination effect of climatic conditions.
[008] Another object of an embodiment herein is to provide the system and method for testing radiator fan module at multi-environment over stress testing conditions.
[009] Another object of an embodiment herein is to provide the method for testing radiator fan module at various climatic zones ranging from lower to higher temperature with relative humidity (RH %).
[0010] Another object of an embodiment herein is to provide the method for testing radiator fan module to evaluate fan duty cycle at various terrain regions with radiator cooling fan in ON condition.
[0011] Another object of an embodiment herein is to provide the method for testing radiator fan module under various environment conditions for determining deterioration mapping of test criteria’s like fan speed, current, voltage and air flow.
[0012] These and other objects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.

BRIEF DESCRIPTION OF DRAWINGS
[0013] The embodiments of the invention are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[0014] Fig. 1 illustrates radiator fan module(s) installed in an environment chamber through fixture(s), according to embodiments as disclosed herein;
[0015] Fig. 2a depicts a bar chart plot of radiator fan speed deterioration effect of conventional continuous durability test and proposed continuous durability test, according to embodiments as disclosed herein;
[0016] Fig. 2b depicts a bar chart plot of radiator fan current deterioration effect of conventional continuous durability test and proposed continuous durability test, according to embodiments as disclosed herein;
[0017] Fig. 2c depicts a bar chart plot of radiator fan air flow rate deterioration effect of conventional continuous durability test and proposed continuous durability test, according to embodiments as disclosed herein;
[0018] Fig. 3a depicts a bar chart plot of radiator fan speed deterioration effect of conventional thermal shock test and proposed thermal shock test, according to embodiments as disclosed herein;
[0019] Fig. 3b depicts a bar chart plot of radiator fan current deterioration effect of conventional thermal shock test and proposed thermal shock test, according to embodiments as disclosed herein;
[0020] Fig. 4a depicts a bar chart plot of radiator fan speed deterioration effect of conventional humidity test and proposed humidity test, according to embodiments as disclosed herein;
[0021] Fig. 4b depicts a bar chart plot of radiator fan current deterioration effect of conventional humidity test and proposed humidity test, according to embodiments as disclosed herein;
[0022] Fig. 5a depicts a bar chart plot of radiator fan speed deterioration effect of conventional ON-OFF durability test and proposed ON-OFF durability test, according to embodiments as disclosed herein;
[0023] Fig. 5b depicts a bar chart plot of radiator fan current deterioration effect of conventional ON-OFF durability test and proposed ON-OFF durability test, according to embodiments as disclosed herein;
[0024] Fig. 5c depicts a bar chart plot of radiator fan air flow rate deterioration effect of conventional ON-OFF durability test and proposed ON-OFF durability test, according to embodiments as disclosed herein; and
[0025] Fig. 6 depicts a flowchart indicating a method for testing the radiator fan module, according to embodiments as disclosed herein.

DETAILED DESCRIPTION
[0026] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0027] The embodiments herein achieve a method for testing a radiator fan module under various environment conditions (hot, cold, humid and ambient temperature conditions) in a continuous testing cycle manner, one test product at a time involved in all testing process. The embodiments herein merges all the four isolated tests into single design validation plan (DVP) test thereby simulating real world user or customer profile through this test method. Referring now to the drawings, and more particularly to Figs. 1 through 6, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.
[0028] The radiator fan module (F), (as shown in fig. 1) mainly includes a fan and fan shrouds. The fan-shroud assembly is an important component of the cooling system. While the fan is adapted for drawing in air, the fan shroud's is adapted to ensure uniform air distribution to the radiator core. By assisting airflow in the engine compartment the fan shroud helps in dismissing excess heat from the engine. This assembly also prevents the recirculation of heated air through the cooling fan. The radiator fan module is also called as radiator fan and shroud assembly.
[0029] In an embodiment, the following factors are considered for the radiator fan testing method (100), where the factors includes, 1) longest travel route in India, 2) Travel hours with respect to the vehicle average speed rate, 3) Climatic zones ranging from Min to max temperature with relative humidity (RH%), 4) Fan duty cycle at various terrain regions with fan ON condition (via. vehicle test data), 5) Correlation of vehicle warrant life and kilometers being converted to equivalent test run hours, 6) Sample size (test product) and platforms were limited based on the project need and requirement. In line with the above factors, vehicle is subjected to travel from Kanyakumari to Kashmir (Refer Table-1) having longest travel route covering 3748 kilometers with travelling time of 23 hours (ideal condition @ average speed of 55 kilometers) will cover the climatic conditions from -6.5 ?C to +50 ?C with average relative humidity (RH) of 85 % at various terrains. This load case will be experimented in line with the customer usage profile, further paves way to road to lab concept within limited hours of accelerated testing for the defined product development case. Based on the real-time data collected from Google survey results, block cycle is derived in line with the RWUP pattern of vehicle driving conditions. For close comparison between existing and proposed test methods, this proposed block cycle is evaluated as per the stated conditions (Table-1) which is validated for 355 hours which is equivalent to drive the vehicle with to and fro trip of Kanyakumari to Kashmir route for 16 times. (1 block cycle – 22.2 hours; 16 block cycles – 355 hours). Continuous running of radiator fan is being considered for this accelerated test. Major severity is focused for radiator fan ON condition which is simulated for fan duty cycle (31. 5%) coverage based on vehicle data.

Table 1- Environment conditions (sub-block cycles) and duty cycles (16 block cycles) for Radiator fan testing method.
[0030] The above table 1 shows predefined/preset environment conditions (hot, cold, humid and ambient temperature conditions – sub-block cycles) and duty cycles (16 block cycles) for radiator fan testing method involving continuous durability test, thermal shock test, humidity test and ON-OFF durability test. The plurality of sub-cycles (A, B, C, D, E, F and G) is considered to be the predefined/preset environment conditions (hot, cold, humid and ambient temperature conditions. Each sub-cycle (A to G) includes varying temperatures and ageing hours. For example, the sub-cycle A includes temperature ranging from -6.5 to 47? Celsius, the relative humidity is 90 % and the total ageing time is 8.75 hours. The sub-cycle B includes temperature ranging from 13 to 45, the relative humidity is 74 % and the total ageing time is 4.5 hours. The sub-cycle C includes temperature ranging from 14 to 45, the relative humidity is 77 % and the total ageing time is 2.25 hours. The sub-cycle D includes temperature ranging from 10 to 40, the relative humidity is 85 % and the total ageing time is 3 hours. The sub-cycle E includes temperature ranging from 12 to 42, the relative humidity is 84 % and the total ageing time is 1.25 hours. The sub-cycle F includes temperature ranging from 3 to 46, the relative humidity is 90 % and the total ageing time is 1.25 hours. The sub-cycle G includes temperature ranging from 1.5 to 50, the relative humidity is 80 % and the total ageing time is 1.25 hours.

Test Parameters Conventional continuous durability test Proposed continuous durability test
Test hours 1000 hours 355 hours
Temperature 80 ±3 º C Hot, Cold, Humid & Ambient
Table 2 - Test parameters for conventional continuous durability test and proposed continuous durability test.
[0031] The aforementioned table 2 indicates test parameters for conventional continuous durability test and proposed continuous durability test. In the conventional continuous durability test the temperature is maintained at 80 ±3 º C and the duty cycle for completion of the conventional continuous durability test is 1000 hours. Whereas, in the proposed continuous durability test, the temperature is varied across hot, cold, humid and ambient temperature conditions and correspondingly the duty cycle for completion of the proposed continuous durability test is just 355 hours thereby the test results are accurate and in quick time, deterioration effect of the radiator fan module is determined.
[0032] Fig. 2a depicts a bar chart plot of radiator fan speed deterioration effect of conventional continuous durability test and proposed continuous durability test, according to embodiments as disclosed herein. Fig. 2b depicts a bar chart plot of radiator fan current deterioration effect of conventional continuous durability test and proposed continuous durability test, according to embodiments as disclosed herein. Fig. 2c depicts a bar chart plot of radiator fan air flow rate deterioration effect of conventional continuous durability test and proposed continuous durability test, according to embodiments as disclosed herein. From the bar charts (2a to 2c) it is clearly evident that proposed continuous durability testing method indicates substantial deterioration effect for fan speed, fan current and air flow rate when compared to the deterioration effect as indicated by the conventional continuous durability test. Thus, the proposed testing method accurately determines the deterioration effect of the radiator fan module in quick time than the conventional continuous durability test.
Test Parameters Conventional Thermal shock test Proposed Thermal shock test
Test hours 160 hours 355 hours with Multi-environment over stress testing (MEOST) condition
Temperature Hot & cold Hot, Cold, Humid & Ambient
Table 3 - Test parameters for conventional thermal shock test and proposed thermal shock test.
[0033] The aforementioned table 3 indicates test parameters for conventional thermal shock test and proposed thermal shock test. In the conventional thermal shock test the temperature is maintained at hot and cold temperature condition, and the duty cycle for completion of the conventional thermal shock test is 160 hours. Whereas, in the proposed thermal shock test, the temperature is varied across hot, cold, humid and ambient temperature conditions and correspondingly the duty cycle for completion of the proposed thermal shock test is 355 hours thereby the test results are accurate in determining the deterioration effect of the radiator fan module.
[0034] Fig. 3a depicts a bar chart plot of radiator fan speed deterioration effect of conventional thermal shock test and proposed thermal shock test, according to embodiments as disclosed herein. Fig. 3b depicts a bar chart plot of radiator fan current deterioration effect of conventional thermal shock test and proposed thermal shock test, according to embodiments as disclosed herein. From the bar charts (3a and 3b) it is clearly evident that proposed thermal shock testing method indicates substantial deterioration effect for fan speed and fan current when compared to the deterioration effect as indicated by the conventional thermal shock test method. Thus, the proposed testing thermal shock method accurately determines the deterioration effect of the radiator fan module when compared to the conventional thermal shock test method.
Test Parameters Conventional humidity test Proposed humidity test
Test hours 96 hours with motor in non-running condition at 80 ºC 355 hours with Multi-environment over stress testing (MEOST) condition with motor running condition.
Temperature Humid Hot, Cold, Humid & Ambient
Table 4 - Test parameters for conventional humidity test and proposed humidity test
[0035] The aforementioned table 4 indicates test parameters for conventional humidity test and proposed humidity test. In the conventional humidity test, the radiator fan is in static condition and the temperature is maintained at 80 ºC with relative humidity not less than 96%, and the duty cycle for completion of the conventional humidity durability test is 96 hours. Whereas, in the proposed humidity test, the temperature is varied across hot, cold, humid and ambient temperature conditions and correspondingly the duty cycle for completion of the proposed continuous durability test is 355 hours with radiator fan in running condition, thereby the test results are accurate in determining the deterioration effect of the radiator fan module.
[0036] Fig. 4a depicts a bar chart plot of radiator fan speed deterioration effect of conventional humidity test and proposed humidity test, according to embodiments as disclosed herein. Fig. 4b depicts a bar chart plot of radiator fan current deterioration effect of conventional humidity test and proposed humidity test, according to embodiments as disclosed herein. From the bar charts (4a and 4b) it is clearly evident that proposed humidity test indicates substantial deterioration effect for fan speed and fan current when compared to the deterioration effect as indicated by the conventional humidity test. Thus, the proposed humidity testing method accurately determines the deterioration effect of the radiator fan module when compared to the conventional humidity testing method.
Test Parameters Conventional ON-OFF durability test Proposed ON-OFF durability test
Test hours 300 hours at 80 ºC 355 hours with MEOST condition.
Temperature Hot Hot, Cold, Humid & Ambient
Table 5 - Test parameters for conventional ON-OFF durability test and proposed ON-OFF durability test
[0037] The aforementioned table 5 indicates test parameters for conventional ON-OFF durability test and proposed ON-OFF durability test. The ON-OFF durability test is also called as start-stop durability test. In the conventional ON-OFF durability test, the temperature is maintained at 80 ºC and the duty cycle for completion of the conventional ON-OFF durability test is 300 hours. Whereas, in the proposed ON-OFF durability test, the temperature is varied across hot, cold, humid and ambient temperature conditions and correspondingly the duty cycle for completion of the proposed ON-OFF durability test is 355 hours thereby the test results are accurate in determining the deterioration effect of the radiator fan module.
[0038] Fig. 5a depicts a bar chart plot of radiator fan speed deterioration effect of conventional ON-OFF durability test and proposed ON-OFF durability test, according to embodiments as disclosed herein. Fig. 5b depicts a bar chart plot of radiator fan current deterioration effect of conventional ON-OFF durability test and proposed ON-OFF durability test, according to embodiments as disclosed herein. Fig. 5c depicts a bar chart plot of radiator fan air flow rate deterioration effect of conventional ON-OFF durability test and proposed ON-OFF durability test, according to embodiments as disclosed herein. From the bar charts (5a to 5c) it is clearly evident that proposed ON-OFF durability test indicates substantial deterioration effect for fan speed, fan current and air flow rate when compared to the deterioration effect as indicated by the conventional ON-OFF durability test. Thus, the proposed ON-OFF durability testing method accurately determines the deterioration effect of the radiator fan module when compared to the conventional ON-OFF durability testing method.
[0039] Fig. 6 depicts a flowchart indicating a method (100) for testing radiator fan module (F), according to embodiments as disclosed herein. For the purpose of this description and ease of understanding, the method (100) is explained herein below with reference to testing a same radiator fan module (F) under multi-environment over stress test conditions. However, it is also within the scope of this invention to practice/implement the entire steps of the method (100) in a same manner or in a different manner or with omission of at least one step to the method (100) or with any addition of at least one step to the method (100) for testing the same or different radiator fan module (F) in any other conditions. At step (102), the method (100) includes, performing continuous durability test on the radiator fan module (F) in an environment chamber (C) at a plurality of predefined environment conditions (as mentioned in table 1) for a predefined duty cycle (block cycle as mentioned in table 1 and paragraph 29). The environment chamber (C) is also called as radiator fan testing chamber. At step (104), the method (100) includes, performing thermal shock test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions (as mentioned in table 1 and paragraph 29) for the predefined duty cycle, subsequent to the continuous durability test. At step (106), the method (100) includes performing humidity test on the same radiator fan module (F) in the environment chamber (C) at the plurality of predefined environment conditions (as mentioned in table 1 and paragraph 29) for the predefined duty cycle, subsequent to performing thermal shock test. At step (108), the method (100) includes, performing ON-OFF durability test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions (as mentioned in table 1 and paragraph 29) for the predefined duty cycle, subsequent to the humidity test.
[0040] The method step (102) of performing continuous durability test on the radiator fan module (F) in the environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle includes, holding, by fixture(s) (FX), the radiator fan module (F) in the environment chamber (C); switching ON electric current supply to the radiator fan module (F); maintaining the radiator fan module (F) in ON condition in a continuous manner at the plurality of predefined environment conditions (hot, cold, humid and ambient temperature conditions, as mentioned in table-1) for the predefined duty cycle, wherein the predefined environment conditions include a plurality of predefined sub-block cycles (A, B, C, D, E, F and G, as mentioned in table 1); monitoring and measuring fan speed, fan current and fan air flow rate of the radiator fan module (F) for specific sub-block cycles at specific intervals; and determining deteriorating effect of the radiator fan module (F) based on the measured fan speed, fan current and fan air flow rate of the radiator fan cooling module (F).
[0041] The method step (104) of performing thermal shock test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle includes, maintaining the radiator fan module (F) in ON condition at the plurality of predefined environment conditions (hot, cold, humid and ambient temperature conditions, as mentioned in table-1) for the predefined duty cycle, wherein the predefined environment conditions include the plurality of predefined sub-block cycles (A, B, C, D, E, F and G, as mentioned in table 1); monitoring and measuring fan speed and fan current of the radiator fan module (F) for specific sub-block cycles at specific intervals; and determining deteriorating effect of the radiator fan module (F) based on the measured fan speed and fan current of the radiator fan cooling module (F).
[0042] The method step (106) of performing humidity test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle includes, maintaining the radiator fan module (F) in ON condition at the plurality of predefined environment conditions (hot, cold, humid and ambient temperature conditions, as mentioned in table-1) for the predefined duty cycle, wherein the predefined environment conditions include a plurality of predefined sub-block cycles (A, B, C, D, E, F and G, as mentioned in table 1); monitoring and measuring fan speed and fan current of the radiator fan module (F) for specific sub-block cycles at specified intervals; and determining deteriorating effect of the radiator fan module (F) based on the measured fan speed and fan current of the radiator fan cooling module (F).
[0043] The method step (108) of performing (108), ON-OFF durability test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle includes, maintaining the radiator fan module (F) in at least one of ON condition and OFF condition at the plurality of predefined environment conditions (hot, cold, humid and ambient temperature conditions, as mentioned in table-1) for the predefined duty cycle, wherein the predefined environment conditions include a plurality of predefined sub-block cycles (A, B, C, D, E, F and G, as mentioned in table 1); monitoring and measuring fan speed and fan current of the radiator fan module (F) for specific sub-block cycles at specified intervals; and determining deteriorating effect of the radiator fan module (F) based on the measured fan speed and fan current of the radiator fan cooling module (F).
[0044] Further, the method (200) includes, operating the radiator fan module (F) with current drawn and speed which is to be compared with conventional test method criteria, after completion of each of the continuous durability test, the thermal shock test, the humidity test and ON-OFF durability test.
[0045] For the purpose of this description and ease of understanding, the summation of the predefined sub-block cycles (A, B, C, D, E, F and G, as mentioned in table 1) is equal to a single block cycle. Further, the single block cycle is 22.2 hours and the predefined duty cycle is equal to 16 block cycles, where the predefined duty cycle for each of the continuous durability test, thermal shock test, humidity test and ON-OFF durability test is 355 hours.
[0046] The technical advantages of the testing method (100) are as follows. The radiator fan module is tested at multi-environment over stress testing conditions for evaluating cross-combination effect of climatic conditions. Merging all the four isolated tests into single design validation plan (DVP) test thereby simulating real world user or customer profile through this test method. The method is used for testing radiator fan module to evaluate fan duty cycle at various terrain regions with radiator cooling fan in ON condition. The method is used for testing radiator fan module at various climatic zones ranging from lower to higher temperature with relative humidity (RH %). The testing method is used to accurately identify deterioration mapping of test criteria’s like fan speed, current, voltage and air flow rate in quick time so as to provide inputs for optimizing the test product at early stages of product development thereby saving cost and time. This test methodology will optimize the testing hours from 1556 hours (i.e., 1000+96+160+300) to 355 hours (i.e., 2 months test duration is simplified to 2 weeks test per test product). Further, simulating the performance deterioration at early stage of validation with significant impact on performance parameters like airflow rate, current, speed at various test conditions at multi-environment overs stress testing (MEOST) conditions were prima facia from this proposed test method. This test method will ensure the real-time effects of the radiator fan and shroud assembly with combined environmental effects like hot, cold, humid (in continuous motor running condition) being captured at the early stage of test product (test sample) validation. This time optimization will lead the design & process test results in sustainable manner and will pave the way for quick inputs to design center of excellence (COE) during early stage of the product development.
[0047] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
,CLAIMS:We claim:
1. A method (100) for testing a radiator fan module (F), said method (100) comprising:
performing (102), continuous durability test on the radiator fan module (F) in an environment chamber (C) at a plurality of predefined environment conditions for a predefined duty cycle;
performing (104), thermal shock test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle;
performing (106), humidity test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle; and
performing (108), ON-OFF durability test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle.

2. The method (100) as claimed in claim 1, wherein said performing (102), continuous durability test on the radiator fan module (F) in the environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle includes,
holding, by fixture(s) (FX), the radiator fan module (F) in the environment chamber (C);
switching ON electric current supply to the radiator fan module (F);
maintaining the radiator fan module (F) in ON condition in a continuous manner at the plurality of predefined environment conditions (hot, cold, humid and ambient temperature conditions, as mentioned in table-1) for the predefined duty cycle, wherein the predefined environment conditions include a plurality of predefined sub-block cycles (A, B, C, D, E, F and G, as mentioned in table 1);
monitoring and measuring fan speed, fan current and fan air flow rate of the radiator fan module (F) for specific sub-block cycles at specified intervals; and
determining deteriorating effect of the radiator fan module (F) based on the measured fan speed, fan current and fan air flow rate of the radiator fan cooling module (F).

3. The method (100) as claimed in claim 1, wherein said performing (104), thermal shock test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle includes,
maintaining the radiator fan module (F) in ON condition at the plurality of predefined environment conditions (hot, cold, humid and ambient temperature conditions, as mentioned in table-1) for the predefined duty cycle, wherein the predefined environment conditions include a plurality of predefined sub-block cycles (A, B, C, D, E, F and G, as mentioned in table 1);
monitoring and measuring fan speed and fan current of the radiator fan module (F) for specific sub-block cycles at specified intervals; and
determining deteriorating effect of the radiator fan module (F) based on the measured fan speed and fan current of the radiator fan cooling module (F).

4. The method (100) as claimed in claim 1, wherein said performing (106), humidity test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle includes,
maintaining the radiator fan module (F) in ON condition at the plurality of predefined environment conditions (hot, cold, humid and ambient temperature conditions, as mentioned in table-1) for the predefined duty cycle, wherein the predefined environment conditions include a plurality of predefined sub-block cycles (A, B, C, D, E, F and G, as mentioned in table 1);
monitoring and measuring fan speed and fan current of the radiator fan module (F) for specific sub-block cycles at specified intervals; and
determining deteriorating effect of the radiator fan module (F) based on the measured fan speed and fan current of the radiator fan cooling module (F).

5. The method (100) as claimed in claim 1, wherein said performing (108), ON-OFF durability test on the same radiator fan module (F) in the same environment chamber (C) at the plurality of predefined environment conditions for the predefined duty cycle includes,
maintaining the radiator fan module (F) in at least one of ON condition and OFF condition at the plurality of predefined environment conditions (hot, cold, humid and ambient temperature conditions, as mentioned in table-1) for the predefined duty cycle, wherein the predefined environment conditions include a plurality of predefined sub-block cycles (A, B, C, D, E, F and G, as mentioned in table 1);
monitoring and measuring fan speed and fan current of the radiator fan module (F) for specific sub-block cycles at specified intervals; and
determining deteriorating effect of the radiator fan module (F) based on the measured fan speed and fan current of the radiator fan cooling module (F).

6. The method (100) as claimed in claim 2 to 5, wherein said method (100) includes, operating the radiator fan module (F) with current drawn and speed which is to be compared with conventional test method criteria, after completion of each of the continuous durability test, the thermal shock test, the humidity test and ON-OFF durability test.

7. The method (100) as claimed in claim 2 to 5, wherein said continuous durability test, the thermal shock test, the humidity test and the ON-OFF durability test are performed in a subsequent and continuous cycle manner;
summation of the predefined sub-block cycles (A, B, C, D, E, F and G, as mentioned in table 1) is equal to a single block cycle;
each sub-cycle (A, B, C, D, E, F and G, as mentioned in table 1) includes varying temperatures and ageing hours;
the single block cycle is equal to 22.2 hours; and
the predefined duty cycle is equal to 16 block cycles, where the predefined duty cycle for each of the continuous durability test, the thermal shock test, the humidity test and the ON-OFF durability test is 355 hours.