DESC:TECHNICAL FIELD
[001] The embodiments herein generally relate to throttle control mechanism in vehicles and more particularly, but not exclusively to throttle control mechanism facilitating push type actuation of fuel injection pump in vehicles.

BACKGROUND
[002] Generally, work vehicles such as tractors or other similar vehicles include a foot operated throttle pedal (hereinafter throttle pedal) and a hand operated throttle lever (hereinafter throttle lever) for providing acceleration to the vehicle. Conventional throttle control mechanism includes a throttle pedal and a throttle lever that are connected to a shaft of the cross shaft assembly through linkages/cables. In operation, the throttle pedal or the throttle lever is pushed or pulled by the driver/operator to turn the shaft of the cross shaft assembly through linkages and the shaft of the cross shaft assembly turns a linkage thereby pulling a connecting rod to pull a lever of the fuel injection pump (hereinafter FIP) to provide fuel to an engine of the vehicle. Pulling of the lever of the FIP causes fuel seepage at the FIP, which is undesirable and may also have other adverse effects associated thereof. Further, the pulling of FIP lever causes wear and tear of parts in FIP thereby reducing the life of the FIP. Further, the aforementioned mechanism is subjected to less response, friction between linkages and vibrations leading to mechanical failure of the linkages.
[003] Therefore, there exists a need for a throttle control mechanism in a vehicle, which obviates the aforementioned drawbacks.

OBJECTS

[004] The principal object of an embodiment of this invention is to provide a throttle control mechanism for a vehicle, which facilitates push type actuation of a fuel injection pump (FIP).
[005] Another object of an embodiment of this invention is to provide a throttle control mechanism for a vehicle, which facilitates effective motion transfer to FIP and better response during throttling.
[006] Yet another object of an embodiment of this invention is to provide a throttle control mechanism for a vehicle, which facilitates smooth operation of mechanical linkages thereof.
[007] 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
[008] 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:
[009] FIG. 1 depicts a perspective view of a throttle control mechanism for a vehicle, according to an embodiment of the invention as disclosed herein;
[0010] FIG. 2 depicts a perspective view of a clevis of the throttle control mechanism, according to an embodiment of the invention as disclosed herein;
[0011] FIG. 3 depicts a perspective view of a mounting bracket of the throttle control mechanism, according to an embodiment of the invention as disclosed herein; and
[0012] FIG. 4 depicts a perspective view of a plunger of the throttle control mechanism, according to an embodiment of the invention as disclosed herein.

DETAILED DESCRIPTION
[0013] 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.
[0014] The embodiments herein achieve a throttle control mechanism for a vehicle, which facilitates push type actuation of a fuel injection pump (FIP). Further embodiments herein achieve a throttle control mechanism for a vehicle, which facilitates effective motion transfer to FIP and better response during throttling. 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.
[0015] FIG. 1 depicts a perspective view of a throttle control mechanism 100 for a vehicle, according to an embodiment of the invention as disclosed herein. In an embodiment, the vehicle (not shown) includes a throttle control mechanism 100, a fuel feed unit F and may include other standard components/systems as present in standard vehicle. In an embodiment, the throttle control mechanism 100 includes a throttle means 102, a cross shaft connecting rod 104, a cross shaft assembly 106, at least one clevis 108 (as shown in fig. 1 and fig. 2), a mounting bracket 110 (as shown in fig. 1 and fig. 3), at least one plunger 112 (as shown in fig. 1 and fig. 4), a connecting rod 114, a plurality of locking pins (not shown), a plurality of washers (not shown), a plurality of locking elements (not shown), a throttle lever cable (not shown), a cable turn link (not shown), a linkage element (not shown), a link support pin (not shown) and may include other standard components as present in standard throttle pedal/lever mechanism.
[0016] In an embodiment, the throttle means 102 includes a foot operated throttle pedal 102p (hereinafter called as ‘throttle pedal’) and a hand operated throttle lever (hereinafter called as ‘throttle lever’), (not shown).
[0017] The throttle pedal 102p is pushed by a driver driving the vehicle to provide acceleration to vehicle. The throttle pedal 102p is connected to a shaft 106s of the cross shaft assembly 106 through the cross shaft connecting rod 104 and the linkage element (not shown).
[0018] The throttle lever (not shown) is pushed or pulled by the driver driving the vehicle to provide acceleration to the vehicle. The throttle lever (not shown) is connected to the shaft 106s of the cross shaft assembly 106 through the throttle lever cable (not shown) and the cable turn link (not shown). One end of the throttle lever cable (not shown) is connected to the throttle lever (not shown) and the other end of the throttle lever cable (not shown) is connected to the cable turn link (not shown). The cable turn link (not shown) is connected to the shaft 106s of the cross shaft assembly 106.
[0019] The cross shaft connecting rod 104 includes a first end 104a and a second end 104b. The first end 104a of the cross shaft connecting rod 104 is connected to the throttle pedal 102p through linkages (not shown). The second end 104b of the cross shaft connecting rod 104 is connected to the shaft 106s of the cross shaft assembly 106 through the linkage element (not shown).
[0020] The cross shaft assembly 106 includes a shaft 106s and may include other standard components/elements as present in standard cross shaft assembly. The shaft 106s of the cross shaft assembly 106 is actuated by the throttle pedal 102p and the throttle lever (not shown) through the cross shaft connecting rod 104 and the throttle lever cable (not shown) respectively. One end of the shaft 106s of the cross shaft assembly 106 is used for mounting the linkage element (not shown) that is connected to the cross shaft connecting rod 104, and the cable turn link (not shown) that is connected to the throttle lever cable (not shown). The other end of the shaft 106s of the cross shaft assembly 106 is used for mounting the clevis 108.
[0021] In an embodiment, the clevis 108 is used to facilitate the push type actuation of the fuel feed unit F. In an embodiment, the clevis 108 includes a first portion 108a (as shown in fig. 2) and a second portion 108b (as shown in fig. 2). In an embodiment, the first portion 108a of the clevis 108 is connected to corresponding portion (not shown) of the shaft 106s of the cross shaft assembly 106 by welding. It is also within the scope of the invention to connect the first portion 108a of the clevis 108 to the shaft 106s of the cross shaft assembly 106 by any other means. In an embodiment, the first portion 108a includes an opening 108c (as shown in fig. 2) adapted to receive the shaft 106s of the cross shaft assembly 106 thereby facilitating the mounting of the clevis 108 to the shaft 106s of the cross shaft assembly 106. In an embodiment, the second portion 108b of the clevis 108 is configured to engage a first portion 112a (as shown in fig. 4) of the plunger 112. In an embodiment, the second portion 108b of the clevis 108 includes an opening 108d (as shown in fig. 2) adapted to receive the locking pin (not shown) thereby engaging the second portion 108b of the clevis 108 to the first portion 112a of the plunger 112. In an embodiment, the opening 108d of the second portion 108b of the clevis 108 is adapted to support/assist the movable motion of the plunger 112 in relation to the movement of the clevis 108 on engagement of the throttle means 102 (at least one of the throttle pedal 102p and the throttle lever). In an embodiment, the opening 108d of the second portion 108b of the clevis 108 is at least an oblong hole. However, it is also within the scope of the invention to provide the second portion 108b of the clevis 108 with any other type of opening or slot or hole without otherwise deterring the intended function of the opening 108d of the second portion 108b of the clevis 108 as can be deduced from the description.
[0022] In an embodiment, the mounting bracket 110 is used for mounting the plunger 112. In an embodiment, the mounting bracket 110 includes a first portion 110a (as shown in fig. 3) and a second portion 110b (as shown in fig. 3). In an embodiment, the mounting bracket 110 is a L shaped bracket. It is also within the scope of the invention to provide any other type of mounting bracket irrespective of shape and size. In an embodiment, the first portion 110a of the mounting bracket 110 includes a protrusion 110c (as shown in fig. 3) having a seating portion 110d (as shown in fig. 3) and an opening 110e (as shown in fig. 3). The protrusion 110c of the first portion 110a is adapted to receive a portion of an intermediate portion 112c (as shown in fig. 4) of the plunger 112 followed by the washer (not shown). The seating portion 110d of the protrusion 110c of the first portion 110a is adapted to provide seating for the intermediate portion 112c of the plunger 112 thereby mounting the plunger 112 to the mounting bracket 110. The opening 110e of the protrusion 110c of the first portion 110a is used to receive the locking element (not shown) that engages the washer (not shown) thereby allowing the plunger 112 to engage the mounting bracket 110. In an embodiment, the second portion 110b extends from the first portion 110a of the mounting bracket 110 substantially transverse to a longitudinal plane of the first portion 110a of the mounting bracket 110. In an embodiment, the second portion 110b of the mounting bracket 110 includes an opening 110f (as shown in fig. 3) adapted to receive a fastener (not shown) therein to secure the mounting bracket 110 to a transmission housing (not shown) of the vehicle. It is also within the scope of the invention to connect the mounting bracket 110 to the transmission housing (not shown) by using any other means.
[0023] In an embodiment, the plunger 112 is used push the connecting rod 114 on engagement of the throttle means 102 (at least one of the throttle pedal 102p and the throttle lever). In an embodiment, the plunger 112 includes a first portion 112a (as shown in fig. 4), a second portion 112b (as shown in fig. 4) and an intermediate portion 112c (as shown in fig. 4). In an embodiment, the first portion 112a of the plunger 112 is movably connected to the second portion 108b of the clevis 108 through the opening 108d of the second portion 108b of the clevis 108. In an embodiment, the first portion 112a of the plunger 112 includes an opening 112d (as shown in fig. 4) adapted to receive the locking pin (not shown) therethrough to provide the locking pin (not shown) to the opening 108d of the second portion 108 of the clevis 108 thereby engaging the plunger 112 to the clevis 108. It is also within the scope of the invention to provide the locking pin (not shown) as an integral part of the first portion 112a of the plunger 112. In an embodiment, the second portion 112b of the plunger 112 is connected to the connecting rod 114 through the link support pin (not shown). In an embodiment, the second portion 112b of the plunger 112 includes an opening 112e (as shown in fig. 4) adapted to receive a portion (not shown) of the link support pin (not shown) thereby connecting the plunger 112 to the connecting rod 114. In an embodiment, the intermediate portion 112c of the plunger 112 is between the first portion 112a and the second portion 112b of the plunger 112. In an embodiment, the intermediate portion 112c of the plunger 112 is pivotably connected to the mounting bracket 110 i.e., the intermediate portion 112c of the plunger 112 is pivotably connected to the first portion 110a of the mounting bracket 110. In an embodiment, the intermediate portion 110c of the plunger 112 includes an opening 112e (as shown in fig. 4) adapted to be received by the protrusion 110c of the first portion 110a of the mounting bracket 110.
[0024] The connecting rod 114 is used to push the lever L (as shown in fig. 1) of the fuel feed unit F on engagement of the throttle means 102 (at least one of the throttle pedal 102p and the throttle lever). The connecting rod 114 includes a first end 114a and a second end 114b. The first end 114a of the connecting rod 114 is connected to the plunger 112 through the link support pin (not shown). The second end 114b of the connecting rod 114 is connected to the lever L of the fuel feed unit F.
[0025] The plurality of locking pins (not shown) includes one locking pin (not shown) which is used to engage the first portion 112a of the plunger 112 to the second portion 108b of the clevis 108 and another locking pin (not shown) which is used to engage the intermediate portion 112c of the plunger 112 to the first portion 110a of the mounting bracket 110. The locking pin (which engages the plunger 112 to the clevis 108) receives washers at both the ends and includes locking element receiving portion (not shown) at both the ends to receive corresponding locking elements therein to facilitate the movable motion between the clevis 108 and the plunger 112.
[0026] The plurality of washers (not shown) includes at least two washers which are received by the locking pin (not shown) that is engaging the clevis 108 and the plunger 112, and another washer (not shown) which is received by the protrusion 110c of the first portion 110a of the mounting bracket 110.
[0027] The plurality of locking elements (not shown) includes at least two locking elements (not shown) which are received by corresponding openings (not shown) of the locking pin (not shown) that engages the clevis 108 and the plunger 112, and another locking element (not shown) that is received by the opening 110e of the protrusion 110c of the mounting bracket 110.
[0028] The fuel feed unit F is used to supply fuel to an engine (not shown) of the vehicle on engagement of the throttle means 102 (at least one of the throttle pedal 102p and the throttle lever). The fuel feed unit F is at least a fuel injection pump. It is also within the scope of the invention to practice/implement the aforementioned components of the throttle control mechanism 100 to actuate any other type of fuel supplying unit.
[0029] The working of the throttle control mechanism 100 is as follows. As and when, the driver pushes the throttle pedal 102p to provide acceleration to the vehicle (not shown), the cross shaft connecting rod 104 is pulled by the throttle pedal 102p due to angular displacement of the throttle pedal 102p. The pulling of cross shaft connecting rod 104 turns the linkage element (not shown) in anti-clockwise direction thereby turning the shaft 106s of the cross shaft assembly 106. The shaft 106s of the cross shaft assembly 106 (the shaft 106s turns in anti-clockwise direction) turns the clevis 108 in anti-clockwise direction which causes the plunger 112 to turn in clockwise direction thereby pushing the connecting rod 114 to push the lever L of the fuel feed unit F to inject fuel into the engine (not shown) thereby providing acceleration to the vehicle. Similarly, as and when, the throttle lever (not shown) is pushed/pulled by the driver to provide acceleration to the vehicle (not shown), the throttle lever cable (not shown) is pulled by the throttle lever (not shown) due to angular displacement of the throttle lever (not shown). The pulling of throttle lever cable (not shown) turns the cable turn link (not shown) in anti-clockwise direction thereby turning the shaft 106s of the cross shaft assembly 106. The shaft 106s of the cross shaft assembly 106 (the shaft 106s turns in anti-clockwise direction) turns the clevis 108 in anti-clockwise direction which causes the plunger 112 to turn in clockwise direction thereby pushing the connecting rod 114 to push the lever L of the fuel feed unit F to inject fuel into the engine (not shown) thereby providing acceleration to the vehicle. Therefore, a throttle control mechanism 100 enabling push type actuation of a fuel feed unit F (fuel injecting pump) is provided for a vehicle.
[0030] 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 throttle control mechanism 100 for a vehicle, said mechanism 100 comprising:
a clevis 108 having a first portion 108a connected to a shaft 106s of a cross shaft assembly 106 and a second portion 108b defining an opening 108d;
a mounting bracket 110; and
at least one plunger 112 having a first portion 112a movably connected to the second portion 108b through the opening 108d of said clevis 108, a second portion 112b connected to a connecting rod 114 adapted to be connected to a lever L of a fuel feed unit F and an intermediate portion 112c between the first portion 112a and the second portion 112b, the intermediate portion 112c pivotably connected to said mounting bracket 110,
wherein
turning the shaft 106s of the cross shaft assembly 106 turns said clevis 108, and said clevis 108 turns said plunger 112 thereby pushing the connecting rod 114 to push the lever L of the fuel feed unit F on engagement of a throttle means 102 of the vehicle.
2. The throttle control mechanism 100 as claimed in claim 1, wherein the throttle means 102 is at least one of a foot operated throttle pedal 102p and a hand operated throttle lever of the vehicle.
3. The throttle control mechanism 100 as claimed in claim 1, wherein the fuel feed unit F is at least a fuel injection pump.
4. The throttle control mechanism 100 as claimed in claim 1, wherein said mounting bracket 110 is connected to a transmission housing of the vehicle.
5. The throttle control mechanism 100 as claimed in claim 1, wherein the opening 108d of the second portion 108b of said clevis 108 is at least an oblong hole.