DESC:TECHNICAL FIELD
[001] The embodiments herein generally relate to throttle position sensors in vehicles and more particularly, but not exclusively to mounting arrangement of non contact type throttle position sensors in vehicles.

BACKGROUND
[001] Generally, vehicles such as tractors or other similar vehicles incorporates a throttle position sensor for sensing the position of a hand operated throttle lever and/or foot operated throttle pedal and accordingly provides an output signal to an engine control unit (ECU) based on which various factors like air-fuel mixing ratio, exhaust gas re-circulation to an engine of the vehicle are controlled in order to meet emission norms.
[002] Conventional contact type throttle position sensor mounting arrangement in the vehicle includes a bracket, a throttle position sensor rod linkage and a throttle position sensor lever. The bracket is used for mounting the throttle position sensor. One end of the throttle position sensor rod linkage is connected to a fuel injection pump lever and the other end of the throttle position sensor rod linkage is connected to the throttle position sensor lever. The throttle position sensor rod linkage is used for pulling the throttle position sensor lever. The throttle position sensor lever is used for actuating/controlling the contact type throttle position sensor. In operation, the hand operated throttle lever or the foot operated throttle pedal is operated by a driver/operator to pull the fuel injection pump lever through various linkages to pull the throttle position sensor lever through the throttle position sensor rod linkage for actuating the contact type throttle position sensor and the contact type throttle position sensor detects the position of the hand operated throttle lever or the foot operated throttle pedal based on the movement of the fuel injection pump lever and accordingly provides the output signal to the engine control unit (ECU). However, the aforementioned contact type throttle position sensor mounting arrangement is subjected to reduced life of the throttle position sensor due to vibrations, and play in the throttle position sensor rod linkage causes zero setting error of the throttle position sensor thereby decreasing the throttle position sensing accuracy of the throttle position sensor which in turn leads to flow fluctuation in exhaust gas recirculation to the engine ultimately leading to more emissions.
[003] Further, the contact type throttle position sensor operates at a lower band (less degree of rotation) due to the aforementioned mounting arrangement and hence has less resolution (variable/inaccurate output signal values to ECU).
[004] Therefore, there exists a need for a non-contact type throttle position sensor mounting arrangement in a vehicle, which obviates the aforementioned drawbacks.

OBJECTS
[005] The principle object of an embodiment of this invention is to provide a fuel injection pump assembly for a vehicle, which comprises a non contact type throttle position sensor that has better life and high accuracy for sensing position of a throttle means of the vehicle.
[006] Another object of an embodiment of this invention is to provide a fuel injection pump assembly for a vehicle, which eliminates zero setting error of the non contact type throttle position sensor.
[007] Another object of an embodiment of this invention is to provide a fuel injection pump assembly for a vehicle, which comprises a non contact type throttle position sensor that has better resolution.
[008] Yet another object of an embodiment of this invention is to provide a fuel injection pump assembly for a vehicle, which provides flexibility in varying the electric span of the non contact type throttle position sensor for different fuel injection pump lever angles.
[009] 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 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 FIGURES
[0010] The embodiments of this 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:
[0011] FIG. 1 depicts a perspective view of a fuel injection pump assembly for a vehicle, according to an embodiment of the invention as disclosed herein;
[0012] FIG. 2 depicts an exploded view of the fuel injection pump assembly, according to an embodiment of the invention as disclosed herein;
[0013] FIG. 3 depicts another perspective view of the fuel injection pump assembly, according to an embodiment of the invention as disclosed herein; and
[0014] FIG. 4 depicts a perspective view of a sensor of the fuel injection pump assembly, according to an embodiment of the invention as disclosed herein.

DETAILED DESCRIPTION
[0015] 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.
[0016] The embodiments herein achieve a fuel injection pump assembly for a vehicle, which comprises a non contact type throttle position sensor that has better life and high accuracy for sensing position of a throttle means of the vehicle. Further, embodiments herein achieve a fuel injection pump assembly for a vehicle, which eliminates zero setting error of the non contact type throttle position sensor. Referring now to the drawings, and more particularly to FIG. 1 through 4, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.
[0017] FIG. 1 depicts a perspective view of a fuel injection pump assembly 100 for a vehicle, according to an embodiment of the invention as disclosed herein. In an embodiment, vehicle (not shown) includes a fuel injection pump assembly 100 (as shown in fig. 1, fig. 2 and fig. 3), an engine control unit (ECU) (not shown), an exhaust gas re-circulation (EGR) valve (not shown), an engine (not shown) and a throttle means (not shown).
[0018] The fuel injection pump assembly 100 is used for supplying a fuel to the engine (not shown). In an embodiment, the fuel injection pump assembly 100 includes a sensor 102 (as shown in fig. 1, fig. 2 and fig. 4), a bracket 104 (as shown in fig. 1, fig. 2 and fig. 3), a fuel injection pump lever 106 (as shown in fig. 1, fig. 2 fig. 3), a housing H (as shown in fig. 1, fig. 2 and fig. 3), a throttle valve (not shown) and may include other standard components used in standard fuel injection pump.
[0019] In an embodiment, the sensor 102 is a non-contact type hall IC (integrated circuit) based electro-magnetic sensor. In an embodiment, the sensor 102 is used for sensing/detecting the position of the throttle means (not shown) of the vehicle and accordingly provides an output signal to the engine control unit (not shown) of the vehicle. It is also within the scope of the invention to provide the fuel injection pump assembly 100 with any other type of sensors for detecting the position of the throttle means (not shown) of the vehicle. In an embodiment, a longitudinal axis of the sensor 102 is co-axial (concentric) to a longitudinal axis of the throttle valve (not shown). In an embodiment, the sensor 102 includes a portion 102a (as shown in fig. 2 and fig. 4) and may include other standard components used in standard non-contact type hall IC (integrated circuit) based electro-magnetic sensor. In an embodiment, the portion 102a of the sensor 102 is in direct contact with a portion 106a (as shown in fig. 2) of the fuel injection pump lever 106. In an embodiment, the portion 102a of the sensor 102 is movably connected to the portion 106a of the fuel injection pump lever 106. In an embodiment, the portion 102a of the sensor 102 is configured to be turned (rotated) by the fuel injection pump lever 106 on engagement of the throttle means (not shown) of the vehicle and the sensor 102 detects the position of the throttle means (not shown) based on the movement (angular displacement) of the fuel injection pump lever 106 and accordingly provides the output signal to the engine control unit (ECU) of the vehicle for regulating exhaust gas flow to the engine (not shown).
[0020] In an embodiment, the bracket 104 is used for mounting the sensor 102. The bracket 104 is fastened to the housing H. It is also within the scope of the invention to connect the bracket 104 to the housing H by riveting, adhesive bonding or by providing any other means. In an embodiment, the bracket 104 includes an opening 104a (as shown in fig. 3) and a plurality of sensor opening 104b (as shown in fig. 3). In an embodiment, the opening 104a of the bracket 104 enables passage of the portion 102a of the sensor 102 therethrough thereby facilitating connection/assembling of the portion 102a of the sensor 102 to portion 106a of the fuel injection pump lever 106 and also to facilitate movement of the portion 102a of the sensor 102 in relation to the movement (angular displacement) of the fuel injection pump lever 106 on engagement of the throttle means (not shown). In an embodiment, the plurality of sensor openings 104b of the bracket 104 is used for receiving corresponding plurality of fasteners (not shown) therein to secure the sensor 102 to the bracket 104 thereby securing the sensor 102 to the housing H of the fuel injection pump assembly 100. It is also within the scope of the invention to connect the sensor 102 to the bracket 104/housing H by riveting, adhesive bonding or by providing any other means.
[0021] The fuel injection pump lever 106 is used for controlling the throttle valve (not shown) of the fuel injection pump assembly 100 on engagement of the throttle means (not shown). The fuel injection pump lever 106 is pulled (indirectly pulled by throttle means through linkages) by the throttle means (not shown) to turn the portion 102a of the sensor 102 and the sensor 102 detects the position of the throttle means (not shown) based on the movement (angular displacement) of the fuel injection pump lever 106 and accordingly provides the output signal to the engine control unit (ECU) of the vehicle. In an embodiment, the fuel injection pump lever 106 includes a portion 106a (as shown in fig. 2) having an opening 106b (as shown in fig. 2) adapted to receive the portion 102a of the sensor 102.
[0022] The throttle valve (not shown) is controlled by the fuel injection pump lever 106 for regulating the flow of fuel to the engine (not shown).
[0023] The engine control unit (not shown) receives the output signal from the sensor 102 and accordingly controls the exhaust gas re-circulation (EGR) valve (not shown) to regulate the flow of exhaust gas to the engine (not shown).
[0024] The exhaust gas re-circulation (EGR) valve (not shown) is used for regulating the flow of exhaust gas to the engine (not shown).
[0025] The engine (not shown) receives required exhaust gas from the exhaust gas re-circulation (EGR) valve (not shown) on activation of the exhaust gas re-circulation (EGR) valve by the engine control unit (not shown).
[0026] The throttle means (not shown) is operated by driver or operator for providing acceleration to the vehicle. In an embodiment, the throttle means (not shown) is at least one of a hand operated throttle lever and a foot operated throttle pedal of the vehicle.
[0027] The arrangement of sensor 102 in the aforementioned fuel injection pump assembly 100 provides better life for the sensor 102, enables the sensor 102 to have high accuracy for sensing/detecting the position of the throttle means (not shown) of the vehicle, flexibility in varying the electric span of the sensor 102 for different angles of the fuel injection pump lever 106. Further, the aforementioned fuel injection pump assembly 100 eliminates zero setting error of the sensor 102.
[0028] 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:CLAIMS
We claim,
1. A fuel injection pump assembly 100 for a vehicle, said fuel injection pump assembly 100 comprising:
a sensor 102 having a portion 102a;
a bracket 104 adapted for mounting said sensor 102; and
a fuel injection pump lever 106 having a portion 106a defining an opening 106b adapted to receive the portion 102a of said sensor 102,
wherein
the portion 102a of said sensor 102 is in direct contact with the portion 106a of said fuel injection pump lever 106;
the portion 102a of said sensor 102 adapted to be movably connected to the portion 106a of said fuel injection pump lever 106;
the portion 102a of said sensor 106 configured to be turned by said fuel injection pump lever 106 on engagement of a throttle means of the vehicle; and said sensor 102 detects a position of the throttle means based on the movement of said fuel injection pump lever 106 and accordingly provides an output signal to an engine control unit (ECU) of the vehicle.
2. The fuel injection pump assembly 100 as claimed in claim 1, wherein said sensor 102 is a non-contact type hall IC based electro-magnetic sensor.
3. The fuel injection pump assembly 100 as claimed in claim 1, wherein the throttle means is at least one of a hand operated throttle lever and a foot operated throttle pedal of the vehicle.