DESC:FORM 2

THE PATENTS ACT 1970
(39 OF 1970)
AND
THE PATENTS RULES 2003

COMPLETE SPECIFICATION
(see Section 10; Rule 13)

AN OIL CIRCULATION SYSTEM FOR TESTING OIL PASSAGES IN A HIGH-POWER DIESEL ENGINE

ENGINE FACTORY AVADI
Unit OF Armoured Vehicles Nigam Limited
Government of India Enterprise
Ministry of Defence
Avadi, Chennai, 600054
Tamil Nadu, India

The following specification particularly describes the invention and the manner in which it is to be performed.
AN OIL CIRCULATION SYSTEM FOR TESTING OIL PASSAGES IN A HIGH-POWER DIESEL ENGINE

TECHNICAL FIELD
[001] The present invention pertains to the design and development of an oil circulation system specifically engineered for testing the oil passages within high-power diesel engines.

BACKGROUND OF THE INVENTION
[002] Diesel engines, particularly those used in high-power applications like combat vehicles, require robust cooling and lubrication systems to ensure optimal performance and longevity. The critical challenge is managing the heat generated by these engines and ensuring the smooth operation of their moving parts. The engine oil serves a dual purpose in these systems: it acts as a coolant to dissipate heat and as a lubricant to minimize friction between rotating and moving components.
[003] To facilitate effective cooling and lubrication, diesel engines are equipped with intricate networks of oil ports and passages. These pathways are strategically integrated into the engine design to direct the oil flow to critical components such as the crankcase, crankshaft, cylinder head, camshaft, and connecting rods. However, ensuring that these oil passages are free from blockages and debris before the engine's final assembly is paramount. Blockages in the oil passages can lead to insufficient cooling and lubrication, resulting in overheating and potential engine failure.
[004] Historically, the process of verifying the integrity of these oil passages has been a labor-intensive and time-consuming task. Traditional methods often involved manual inspections and partial disassembly of the engine, which were not only inefficient but also prone to human error. As the demand for higher reliability and efficiency in engine production increased, there was a pressing need for a more systematic and reliable approach to test the oil circulation system.
[005] The present invention addresses this need by introducing a sophisticated oil circulation testing system designed to ensure the free flow of oil through all engine passages before the final assembly.
[006] The present invention not only streamlines the testing process but also enhances the reliability and quality of the engines produced. By ensuring that all oil passages are clean and unobstructed, the system minimizes the risk of engine defects, reduces the need for rework, and contributes to overall cost savings. This innovation represents a significant advancement in the field of diesel engine manufacturing, aligning with the industry's goals of improving efficiency, reliability, and performance.

OBJECTS OF THE INVENTION
[007] The primary object of this invention is to provide a reliable and efficient oil circulation system for testing the oil passages inside high-power diesel engines, ensuring the free flow of oil to all engine components before final assembly.
[008] Yet another object is to facilitate a comprehensive testing process that verifies the integrity and functionality of oil ports and passages within the engine, preventing potential blockages and ensuring optimal engine performance.
[009] Another objective is to reduce the incidence of engine overheating and defects caused by blocked oil passages, thereby enhancing the durability and operational efficiency of the engine.
[0010] Yet another object of the invention is to provide a cost-effective solution that minimizes rework and maintenance costs by ensuring the thorough testing and validation of oil circulation within the engine prior to its final assembly.

SUMMARY OF THE INVENTION
[0011] These and other aspects 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 preferred 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.
[0012] According to an embodiment of the present invention, an oil circulation system for testing oil passages in a high-power diesel engine comprises an oil tank with an oil level indicator and an oil filter; a gear oil pump driven by a motor to pump oil from the oil tank to the engine at a pressure of 8 Kgf/cm²; a magnetic oil filter to remove metallic particles from the oil; an oil flow control valve to regulate the flow of oil; pressure relay valves to maintain and control the oil pressure; flexible hoses to connect various components of the system; and pressure gauges to monitor the oil pressure. The system is configured to circulate oil through the engine oil passages for a duration of 5 minutes to ensure the free flow of oil to all moving parts and return the oil to the oil tank.
[0013] According to another embodiment of the present invention, the gear oil pump is coupled to the motor via a motor coupling and connected to the oil tank and engine inlet through pipe couplings.
[0014] According to an embodiment of the present invention, a method for testing oil passages in a high-power diesel engine comprises the steps of providing an oil circulation system; filling the oil tank with 20W50 oil; operating the gear oil pump to circulate the oil through the engine oil passages at a pressure of 8 Kgf/cm²; monitoring the oil pressure using pressure gauges; ensuring the oil circulates through all engine passages for a duration of 5 minutes; and returning the oil to the oil tank.
[0015] According to another embodiment, the method further comprises the step of filtering the oil using a magnetic oil filter to remove metallic particles during the circulation process.
[0016] According to yet another embodiment of the present invention, the method further comprises the step of regulating the oil flow using an oil flow control valve to ensure consistent pressure and flow throughout the engine passages.
[0017] According to yet another embodiment of the present invention, the pressure relay valves are configured to automatically adjust the oil pressure to maintain a constant pressure of 8 Kgf/cm² throughout the testing process.
[0018] These and other aspects 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 the preferred 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 THE DRAWINGS
[0019] The other objects, features and advantages will occur to those skilled in the art from the following description of the preferred embodiment and the accompanying drawings in which:
[0020] FIG. 1 illustrates an oil circulation circuit diagram, according to the present invention.
[0021] FIG. 2 illustrates an oil circulation system for testing oil passages in a high-power diesel engine, according to the present invention.
[0022] FIG. 3 illustrates an oil circulation system for testing oil passages in a high-power diesel engine, according to the present invention.
[0023] Although the specific features of the present invention are shown in some drawings and not in others. This is done for convenience only as each feature may be combined with any or all of the other features in accordance with the present invention.

DETAILED DESCRIPTION OF THE INVENTION
[0024] In the following detailed description, a reference is made to the accompanying drawings that form a part hereof, and in which the specific embodiments that may be practised are shown by way of illustration. These embodiments are described in sufficient detail to enable those skilled in the art to practice the embodiments and it is to be understood that other changes may be made without departing from the scope of the embodiments. The following detailed description is therefore not to be taken in a limiting sense. The various embodiments of the present invention provide for a test rig for pressure testing of various aluminium casting used in high power diesel engine.
[0025] According to an embodiment of the present invention, an oil circulation system for testing oil passages in a high-power diesel engine comprises an oil tank with an oil level indicator and an oil filter; a gear oil pump driven by a motor to pump oil from the oil tank to the engine at a pressure of 8 Kgf/cm²; a magnetic oil filter to remove metallic particles from the oil; an oil flow control valve to regulate the flow of oil; pressure relay valves to maintain and control the oil pressure; flexible hoses to connect various components of the system; and pressure gauges to monitor the oil pressure. The system is configured to circulate 20W50 oil through the engine oil passages for a duration of 5 minutes to ensure the free flow of oil to all moving parts and return the oil to the oil tank.
[0026] According to another embodiment of the present invention, the oil tank is located in a base frame and includes accessories such as an oil level indicator and a pressure gauge.
[0027] According to yet another embodiment, the oil circulation system further comprises a drain cock for removing oil from the system.
[0028] According to another embodiment of the present invention, the gear oil pump is coupled to the motor via a motor coupling and connected to the oil tank and engine inlet through pipe couplings.
[0029] According to yet another embodiment, the oil circulation system further comprises a special tray to collect any oil leakage during the testing process.
[0030] According to an embodiment of the present invention, a method for testing oil passages in a high-power diesel engine comprises the steps of providing an oil circulation system; filling the oil tank with 20W50 oil; operating the gear oil pump to circulate the oil through the engine oil passages at a pressure of 8 Kgf/cm²; monitoring the oil pressure using pressure gauges; ensuring the oil circulates through all engine passages for a duration of 5 minutes; and returning the oil to the oil tank.
[0031] According to another embodiment, the method further comprises the step of filtering the oil using a magnetic oil filter to remove metallic particles during the circulation process.
[0032] According to yet another embodiment of the present invention, the method further comprises the step of regulating the oil flow using an oil flow control valve to ensure consistent pressure and flow throughout the engine passages.
[0033] According to another embodiment, the method further comprises the step of draining the oil from the system using a drain cock after the testing is completed.
[0034] According to yet another embodiment of the present invention, the pressure relay valves are configured to automatically adjust the oil pressure to maintain a constant pressure of 8 Kgf/cm² throughout the testing process.
[0035] 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 as 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.
[0036] 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 preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modifications. However, all such modifications are deemed to be within the scope of the claims.
,CLAIMS:We Claim:
1. An oil circulation system for testing oil passages in a high-power diesel engine, comprising:
an oil tank with an oil level indicator and an oil filter;
a drain cock for removing oil from the system.
a gear oil pump driven by a motor to pump oil from the oil tank to the engine at a pressure of 8 Kgf/cm²;
a magnetic oil filter to remove metallic particles from the oil;
an oil flow control valve to regulate the flow of oil;
a pressure relay valves to maintain and control the oil pressure;
a flexible hoses to connect various components of the system; and
a pressure gauges to monitor the oil pressure;
wherein the system is configured to circulate oil through the engine oil passages for a duration of 5 minutes to ensure the free flow of oil to all moving parts and return the oil to the oil tank.
2. The oil circulation system as claimed in claim 1, wherein the oil tank is located in a base frame and includes accessories such as the oil level indicator and the pressure gauge.
3. The oil circulation system as claimed in claim 1, wherein the gear oil pump is coupled to the motor via a motor coupling and connected to the oil tank and engine inlet through pipe couplings.
4. The oil circulation system as claimed in claim 1, further comprising a special tray to collect any oil leakage during the testing process.
5. A method for testing oil passages in a high-power diesel engine, comprising the steps of:
providing an oil circulation system as defined in claim 1;
filling the oil tank with oil;
operating the gear oil pump to circulate the oil through the engine oil passages at a pressure of 8 Kgf/cm²;
monitoring the oil pressure using pressure gauges;
ensuring the oil circulates through all engine passages for a duration of 5 minutes;
returning the oil to the oil tank.
6. The method as claimed in claim 5, further comprising the step of filtering the oil using a magnetic oil filter to remove metallic particles during the circulation process.
7. The method as claimed in claim 5, further comprising the step of regulating the oil flow using an oil flow control valve to ensure consistent pressure and flow throughout the engine passages.
8. The method as claimed in claim 5, further comprising the step of draining the oil from the system using a drain cock after the testing is completed.
9. The oil circulation system as claimed in claim 1, wherein the pressure relay valves are configured to automatically adjust the oil pressure to maintain a constant pressure of 8 Kgf/cm² throughout the testing process.

Dated this 31st day of January 2025.

Saravanan Gopalan
Registered Patent Agent
(INPA – 3249)