CN101508243B

CN101508243B - Electric accelerator pedal for vehicle

Info

Publication number: CN101508243B
Application number: CN2008100441992A
Authority: CN
Inventors: 过于成; 王慕昊; 焦兴军; 彭禹
Original assignee: United Automotive Electronic Systems Co Ltd
Current assignee: United Automotive Electronic Systems Co Ltd
Priority date: 2008-12-25
Filing date: 2008-12-25
Publication date: 2012-11-07
Anticipated expiration: 2028-12-25
Also published as: CN101508243A

Abstract

The invention discloses an electronic accelerator pedal. The tail end of a pedal arm is provided with a force lag generating mechanism which comprises a base, two friction elements, a spring support and a spring; the two friction elements are arranged on two sides of the base, the spring support is arranged in an open slot at the upper end of the base, and the upper end face of the spring support is provided with a spring retainer which is arranged between a spring retainer of the spring support and a second spring retainer on a shell; and the lower end of the spring support is a wedge with a wide upper part and a narrow lower part, and two inclined planes at the lower end of the wedge are contacted with the end faces of the friction elements. The electronic accelerator pedal can generate good force lag effect and has good cost effectiveness.

Description

Electric accelerator pedal for vehicle

Technical field

The present invention relates to the engine system of automobile, particularly relate to a kind of efp that is applicable to various vehicles.

Background technology

Mostly existing traditional Das Gaspedal is to be connected on the fuel sub-system of driving engine through backguy, directly controls valve opening through backguy.Based on the theory of drive-by-wire (drive-by-wire), substituting traditional stay-supported pedal with efp is the development tendency of automotive field from now on.In the acceleration pedal of electronic type completely, the application site sensor reflects accelerator pedal position, and sends position signal to throttle controller.Sensor-based Das Gaspedal is specially adapted to electronic control system, and accelerator pedal position is a variable in the engine controlled variable.

For the friction force between backguy and its protecting sleeve; This driving sensation that the driver generally likes traditional stay-supported pedal to give; So the novel electronic Das Gaspedal should design corresponding mechanism and produce this friction force, make the driver that same driving sensation arranged.For example people's such as wortmann United States Patent(USP) No. 6360631 has been announced a pedal gear, and this mechanism is a kind of plunger tpe assembly that can produce lag effect.

But in general, present efp, have plenty of does not have power bradytoia life structure at all, can not fully produce power residual effect fruit, and the driving sensation of traditional mechanical stay-supported pedal can't be provided; Though the strong bradytoia life structure that has, the structure relative complex, parts are many, and cost benefit is poor.Therefore, need a kind ofly can provide good power residual effect to answer now, good cost-benefit new design is arranged again.

Summary of the invention

The technical matters that the present invention will solve provides a kind of efp, can produce good power residual effect and should possess good cost benefit again.

For solving the problems of the technologies described above; Efp of the present invention comprises: housing, pedal arm, rotating shaft and sensor assembly; Said pedal arm is installed on the housing through rotating shaft; And can drive rotating shaft and rotate synchronously, said sensor assembly is connected with rotating shaft, and the brush arm that drives sensor assembly during the rotating shaft rotation rotates synchronously;

Wherein: also comprise the power bradytoia life structure of the tail end that is arranged on pedal arm, this power bradytoia life structure comprises that pedestal, two friction elements, springs support and spring;

The pedestal of hollow is positioned at the tail end of pedal arm, respectively opens a friction element support slot in the both sides of pedestal, and friction element is separately positioned in the friction element support slot, and the outer face that exposes is a friction face; The upper surface that is positioned at pedestal is provided with an open slot, and said spring supports and is arranged in the open slot, and the supported by springs upper surface is provided with the spring location, and spring is positioned between second spring location on supported by springs spring location and the housing; The supported by springs lower end is a wedge shape wide at the top and narrow at the bottom, and two inclined-planes of this wedge shape lower end contact with the end face of friction element.

Efp of the present invention owing to adopted later-model power bradytoia life structure, thereby has reduced the quantity of assembly on the whole on the basis of realizing its signal transfer function fully; The structure of the life of power bradytoia simultaneously structure is simplified and effectively; Therefore, can effectively increase the benefit cost-cutting.

Efp of the present invention, under the effect of spring, spring supports two friction elements is released along the friction element support slot laterally, is following the motion of pedal arm, produces force of sliding friction between friction element and the housing sidewall, produces power residual effect fruit.Pedal arm is positioned at diverse location, and the pressure that spring produces is different, and the suffered outward thrust of friction element is also different, and therefore this power bradytoia becomes mechanism to have adaptation function and power to stagnate and change with the pedal arm position is different.

Efp of the present invention changes the pedal anglec of rotation through trampling, and then the output various signals, and reflection driver's driving intention is applicable to especially manned vehicle of various vehicles.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation:

Fig. 1 is efp one example structure figure of the present invention;

Fig. 2 is the cutaway view of efp shown in Figure 1;

Fig. 3 is the part-structure scheme drawing of power bradytoia life structure in the efp shown in Figure 1;

Fig. 4 is the cutaway view of power bradytoia life structure in the efp shown in Figure 1;

Fig. 5 is rotating shaft and sensor assembly bonded assembly structural representation;

Fig. 6 is sensor assembly and rotating shaft bonded assembly structural representation.

The specific embodiment

Referring to Fig. 1, shown in 2, efp of the present invention comprises that housing 1, pedal arm 5, spring 2, spring support 3, two friction elements 4, rotating shaft 6 and sensor assemblies 7.

The front end of said housing 1 has an opening 16, and left and right sides wall is provided with axis hole 17.The afterbody of pedal arm 5 is provided with a shaft hole 18.Pedal arm 5 is inserted housings 1 from the opening of housing 1 16, and left and right directions is spacing by housing 1 inwall, again rotating shaft 6 is penetrated the axis hole 17 of housing 1 and the shaft hole 18 of pedal arm 5, makes pedal arm 5 be installed in the housing 1 and can rotate.Said rotating shaft 6 can be adopted stepped shaft, at this moment can only rotating shaft 6 be inserted from a side opening 16 of housing 1 pedal arm 5 is installed.Via rotating shaft 6 radial locations, pedal arm 5 rotates with the axle center of rotating shaft 6, and drives rotating shaft 6 and rotate synchronously, and the displacement with pedal arm 5 passes to sensor assembly 7 thus, exports corresponding electric signal.

Referring to shown in Figure 2, the upper end side that pedal arm 5 is positioned on the shaft hole 18 has first confined planes 51, and has second confined planes 12 on these first confined planes, 51 corresponding housings 1.Under the state of nature, first confined planes 51 contacts with second confined planes 12, guarantees the idle position of pedal arm 5.

The left side below that pedal arm 5 is positioned at shaft hole 18 has the 3rd confined planes 52, and has the 4th confined planes 13 on the 3rd confined planes 52 corresponding housings 1.When pushes pedals arm 5 made its rotation, the 3rd confined planes 52 on the pedal arm 5 finally contacted with the 4th confined planes 13 of housing 1, and this is the mechanical stop of pedal arm 5.

Pedal arm 5 can rotate at idle position and wide-open throttling position, and its maximum anglec of rotation can regulate through the position that changes the 3rd confined planes 52 on the pedal arm 5, and then changes the rotating distance of pedal arm 5.

In conjunction with Fig. 3, shown in 4, the life of power bradytoia in the present invention structure is positioned at the tail end of pedal arm 5, and this power bradytoia life structure comprises that pedestal 53, two friction elements 4, springs support 3 and spring 2.

The pedestal 53 of hollow is positioned at the tail end (being positioned at the right side side of Fig. 1,2 shaft holes 18) of pedal arm 5.Respectively open a friction element support slot 54 in the both sides of pedestal 53.Friction element 4 is that one one side is the column hexahedron on cambered surface or inclined-plane 41, is placed on respectively in the friction element support slot 54.Its cambered surface or inclined-plane 41 be towards the inboard of friction element support slot 54 when friction element 4 was arranged in the friction element support slot 54, and the outer face 42 that exposes (face relative with cambered surface or inclined-plane 41) is friction face.The upper surface that is positioned at pedestal 53 is provided with an open slot 55, and this open slot 55 communicates with friction element support slot 54.Spring supports 3 and is arranged in the open slot 55, and the upper surface of spring support 3 is provided with spring location 31, and spring 2 is positioned between the spring location 31 and second spring location 13 on the housing 1 of spring support 3.

It is that wedge shape wide at the top and narrow at the bottom is (for example shown in Figure 3 that spring supports 3 lower end; This wedge shape lower end has wide vertical both ends of the surface; Inwardly be formed slopely two symmetrical inclined-planes in the below along these wide vertical both ends of the surface; Stretch the narrow vertical both ends of the surface of formation along this two inclined-plane to the lower edge), two inclined-planes 32 of this wedge property lower end contact with the cambered surface or the inclined-plane 41 of friction element 4.

During state of nature,, force friction element 4 outwards to move along the groove 54 of pedestal 53 because the pressure that spring 2 provides makes spring support 3 be in the trend that moves downward.The friction face 42 of friction element 4 contacts with the inwall 11 of housing 1, and receives inwall 11 spacing of housing 1.The pressure of 2 pairs of springs supports 3 of spring is converted into the pressure of the inwall 11 of 4 pairs of housings 1 of friction element with fixing ratio thus.When 4 motions of pedal arm 5 rotating band dynamic friction elements, then 11 of the inwalls of the friction face 42 of friction element 4 and housing 1 produce kinetic force of friction.The position of pedal arm 5 is different, and spring 2 deformation are different, and spring is supported 3 positive pressure difference, cause the pressure difference of the inwall 11 of 4 pairs of housings 1 of friction element, so friction force is different.So follow the power residual effect fruit that pedal arm 5 diverse locations change, and friction element 4 can outwards move in the groove 54 of pedestal 53, has certain conciliation function certainly.

Confirm at the material of friction element 4 and housing 1, under the spring 2 unmodified prerequisites, can be through changing the effect that degree of dip that spring supports two inclined-planes 32 of 3 wedge shape lower end comes change power to stagnate.In tolerance interval, two inclined-planes 32 are big more with the angle of level, and the power of generation stagnates big more.

Sensor assembly 7 is connected with rotating shaft 6.Referring to shown in Figure 6, a side of said rotating shaft 6 is provided with the coupling end with sensor assembly 7, and this coupling end is a plectrum structure 61.For example this plectrum structure 61 is for having the outward extending round platform in a side end face along rotating shaft 6, extends to form two ears along the bilateral symmetry of this round platform to both sides.Referring to shown in Figure 5, the brush arm of sensor assembly 7 (rotor) coupling end is and said plectrum structure 61 corresponding groove structures 71 that the plectrum structure 61 of rotating shaft 6 is positioned at the groove structure 71 of brush arm again.The brush arm that when rotating shaft 6 rotations, drives sensor assembly 7 rotates synchronously, but rotating shaft 6 shake radially is to not influence of brush arm.

Sensor assembly 7 is made up of elements such as brush arm, brush, pcb board and shells.The displacement of pedal arm 5 is delivered to sensor assembly 7 through rotating shaft 6, and brush arm drives the brush motion, causes the variation of electric signal in the sensor assembly 7, the signal that makes 5 displacements of sensor assembly 7 output reflection pedal arms.The signal of sensor assembly 7 outputs is sent to control unit, and then the aperture of control throttle gate.

More than through the specific embodiment the present invention has been done detailed explanation, but these are not to be construed as limiting the invention.Those skilled in the art also can make some distortion and improvement under the situation that does not break away from the principle of the invention, these also should be regarded as protection scope of the present invention.

Claims

1. efp; Comprise housing, pedal arm, rotating shaft and sensor assembly, said pedal arm is installed on the housing through rotating shaft, and can drive rotating shaft and rotate synchronously; Said sensor assembly is connected with rotating shaft, and the brush arm that drives sensor assembly during the rotating shaft rotation rotates synchronously;

It is characterized in that: also comprise the power bradytoia life structure of the tail end that is arranged on pedal arm, this power bradytoia life structure comprises that pedestal, two friction elements, springs support and spring;

2. efp as claimed in claim 1 is characterized in that: said friction element is the hexahedron of column, and it is cambered surface or inclined-plane with the end face that two inclined-planes of spring supports wedge lower end contact.

3. according to claim 1 or claim 2 efp; It is characterized in that: said supported by springs wedge shape lower end does; Have wide vertical both ends of the surface and narrow vertical both ends of the surface in the supported by springs lower end, connect by two inclined-planes between wide vertical both ends of the surface and the narrow vertical both ends of the surface.

4. according to claim 1 or claim 2 efp; It is characterized in that: said power bradytoia life structure is through changing into the side direction thrust pressure to friction element with spring to supported by springs pressure; Pressure changes along with the position difference of pedal arm; Friction element outer face and inner walls friction, and then produce variable friction force.

5. efp as claimed in claim 1 is characterized in that: said pedal arm can rotate at idle position and wide-open throttling position.

6. efp as claimed in claim 1 is characterized in that: said rotating shaft is a stepped shaft.

7. efp as claimed in claim 1; It is characterized in that: a side of said rotating shaft is provided with and sensor assembly bonded assembly plectrum structure; Sensor assembly is provided with and the corresponding groove structure of said plectrum structure, and the plectrum structure of rotating shaft is positioned at the groove structure of sensor assembly.