CN201354010Y - Automobile accelerator pedal with pedal angle-displacement transducer - Google Patents

Abstract

The utility model relates to an automobile accelerator pedal with a pedal angle-displacement transducer, in particular to an electronic-injection automobile accelerator pedal with a non-contact type pedal angular-displacement transducer, which belongs to the automobile component. The electronic-injection automobile accelerator pedal is designed on the basis of a non-contact type rotational-angle displacement measurement principle, can accurately reflect the mechanical variable quantity by electronic data under severe environment and has more sensitive angle change reaction. The electronic-injection automobile accelerator pedal comprises a pedal and a bottom plate which are connected by an elastic-return hinge mechanism which is arranged at the roots of both the pedal and the bottom plate; and the middle parts of both the pedal and the bottom plate are provided with a pedal angle amplifying mechanism and an electromagnetic induction device, wherein the electromagnetic induction device is used for detecting the timely angle change of the pedal relative to the bottom plate. The utility model has simple structure, small volume, convenient installation, obvious oil saving effect, safe and reliable work and long service life and can improve the sensitivity of the electronic-injection automobile and ensure the balanced electronic-injection automobile driving.

Description

The transaxle pedal of pedal angular displacement transmitter

Technical field

The utility model relates to a kind of automobile component, the transaxle pedal that has contactless pedal angular displacement transmitter that uses on especially a kind of EFI formula automobile.

Background technology

At present, the detection of rotational displacement is widely used in industrial sector.Angular-motion transducer is applied on the transaxle pedal, valve opening that can the Control Engine unit; Be applied in and carry out the control of steering wheel shaft rotary corner on the steamer; Also can be applicable on the devices such as angle position control of heavy type or agricultural machinery.Adopt generally speaking and rotational angle is changed into straight-line displacement or corner by mechanical drive angle signal is changed into voltage signal to drive straight line resistor or potential device.Wherein the adoptable sensor of non-contact measurement rotational displacement has the Weight and disk type sensor, grating sensor, hall element sensor, magneto sensor sensor etc., should be able under-40 ℃ to+85 ℃ service conditions, work in ambient temperature in actual use, work life need reach action more than 1,000 ten thousand at least, but and long-term work under dust and the very big environment of vibration.

Yet existing EFI formula automobile all adopts potentiometric transducer to come the fuel charge of Control of Automobile.It mainly is made up of resistance film track, printed circuit board or ceramic substrate in the spraying, by the size of brush contact angle displacement signal.Because resistance value can change with ambient temperature, brush contact slides on resistance track, its work life is also limited, and the voltage of potential device output needs resistor to work under a very harsh working environment, the variation of ambient humidity can cause the data of debugging under factory's working environment, under running environment, can produce very big error, so that exceed the detection range of permission.Simultaneously, be sprayed on resistive layer on printed panel or the ceramic substrate and the continuous wearing and tearing between the brush, can influence the work life of potential device or sensor and the reliability that contacts, and dust, air humidity, parameters such as vibration also can increase the precision of electric noise and detection.If improve the problem of above-mentioned existence, designed potentiometric transducer no matter mechanically, selecting for use of material all can increase productive costs on the electric processing technology.And contactless angular-motion transducer is applied in the car acceleration, its maximum problem is because the corner of pedal is less, its survey precision can't satisfy operating needs, therefore, according to the knowledge of the applicant, domestic present edge does not see that non-contact measurement rotational displacement technology is applied to the Related product or the report that are used for the Control of Automobile fuel charge on the electro jet car comes out.

The utility model content

The purpose of this utility model provides a kind of non-contact measurement rotational displacement principle design of utilizing, can be under harsh environment with mechanical variable quantity exactly by electronic data reflection, and the transaxle pedal of the more sensitive pedal angular displacement transmitter of angle reacting condition.

The technical solution of the utility model is: comprise stretcher, base plate, stretcher links to each other by the elastic reset linkwork that is arranged on both roots with base plate, also is provided with pedal angle enlarger at the middle part of stretcher and base and detects the electromagnetic induction device of stretcher with respect to the timely angle variable quantity of base plate.

Described pedal angle enlarger comprises interconnective throttle axle, baffle plate one, baffle plate two, roller, retracing spring one, retracing spring two and attaching parts, and corresponding described roller is provided with the roller road on the base plate; Described electromagnetic induction device comprises magnet, permanent magnet, electronic cartridge, circuit card, programmable hall element; Electromagnetic induction device is arranged on the outside of baffle plate one, magnet, permanent magnet are fixedly connected on the outer end of throttle axle towards electronic cartridge, constitute the vestibule of a corresponding electronic cartridge, described programmable hall element is fixedly connected on the electronic cartridge, and stretches in the described vestibule.

The utility model can enlarge through mechanical device the rotational displacement of pedal angle with rotation angle range, and be converted to rotating field, varying in size according to different angles position magnetic-field intensity then, by the conversion sensor (programmable hall element) of magnetic field flux amount to voltage signal, the size of this converts magnetic field of noncontact measurement, sensor output signal is again after electronic circuit is handled and amplified, the required signal voltage of car engine control unit (being ECU or electric injection device) is satisfied in output, realizes the adjusting to the automobile fuel charge.The beneficial effects of the utility model are: 1, amplify the position by the mechanical type angular transposition, successfully the low-angle displacement with pedal is amplified to the value that satisfies the survey precision requirement, solved the utilization of contactless angular-motion transducer in car acceleration, can be electric injection device the voltage signal that meets the demands is provided.2, there are not wearing and tearing in noncontacting proximity sensor, is higher than prior art service life far away.3, simple in structure, volume is little, easy for installation.4, can improve the sensitivity of automobile electronic fuel oil jet device, make and drive more balance, have tangible oil-saving effect, and safe and reliable, the life-span is long.

Description of drawings

Fig. 1 is a structural representation of the present utility model

1 pedal among the figure, the 2nd, jump ring, the 3rd, major axis cover one, the 4th, pedal retracing spring, the 5th, major axis cover two, 6th, major axis, the 7th, jump ring one, 8th, packing ring one, 9th, pad, the 10th, packing ring two, 11st, cover, the 12nd, throttle axle, the 13rd, magnet, the 14th, permanent magnet, the 15th, electronic cartridge, the 16th, programmable hall element, the 17th, circuit card, the 18th, electronics lid, the 19th, screw, the 20th, base plate, the 21st, baffle plate one, the 22nd, retracing spring one, 23rd, reseting spring sleeve one, 24th, retracing spring two, the 25th, reseting spring sleeve two, the 26th, baffle plate two, 27th, roller, the 28th, rivet shaft.

Fig. 2 is the utility model mode of operation reference diagram

The specific embodiment

The utility model as shown in Figure 1, 2, comprise stretcher 1, base plate 20, stretcher 1 links to each other by the elastic reset linkwork that is arranged on both roots with base plate 20, also is provided with pedal angle enlarger and detects the electromagnetic induction device of stretcher with respect to the timely angle variable quantity of base plate at the middle part of stretcher 1 with base 20.

Pedal angle enlarger comprises interconnective throttle axle 12, baffle plate 1, baffle plate 2 26, roller 27, retracing spring 1, retracing spring 2 24 and attaching parts, and corresponding roller 27 is provided with the roller road on the base plate 20; Electromagnetic induction device comprises magnet 13, permanent magnet 14, electronic cartridge 15, circuit card 17, programmable hall element 16; Electromagnetic induction device is arranged on the outside of baffle plate 1, magnet 13, permanent magnet 14 are fixedly connected on the outer end of throttle axle 12 towards electronic cartridge 15, constitute the vestibule of a corresponding electronic cartridge 15, programmable hall element 16 is fixedly connected on the electronic cartridge 15, and stretches in the vestibule.

Contrast Fig. 1 further specifies the utility model below:

At first, be the mechanical action part.Pedal 1 and base plate 20 by jump ring 2, major axis overlap 1, pedal retracing spring 4, major axis overlap 25, major axis 6 is connected.The lower end of pedal 1 and base plate 20 all is sleeved on the major axis 6, and pedal spring 4 is sleeved on major axis and overlaps on one 3, and the two ends of pedal spring 4 offset with pedal 1 and pedal 20 respectively.Throttle axle 12 is rotatably connected on the side of pedal 1 by jump ring 1, packing ring 1, pad 9, packing ring 2 10, cover 11.It is corresponding with the electromagnetic induction device that is installed in the pedal another side that throttle axle 12 stretches out an end of pedal 1.

The pedal corner enlarger that is made as one with throttle axle 12 comprises baffle plate 1, retracing spring 1, reseting spring sleeve 1, retracing spring 2 24, reseting spring sleeve 2 25, baffle plate 2 26, roller 27, rivet shaft 28.One end of baffle plate 1, baffle plate 2 26 is installed on the throttle axle 12 and with throttle axle 12 and rotates synchronously, the other end of baffle plate 1, baffle plate 2 26 links to each other by rivet shaft 28, roller 27 is installed on the rivet shaft 28, on rivet shaft 28, the both sides of roller 27 are set with retracing spring 1, retracing spring 2 24, for guaranteeing the stability of retracing spring work, outside two retracing springs, also be provided with reseting spring sleeve 1, reseting spring sleeve 2 25.Roller 27 is corresponding with the roller road on the base plate 20.

In running condition as shown in Figure 2, pedal 1 is 18 ± 2 ° around the corner of major axis 6, and correspondingly baffle plate 1, baffle plate 2 26 drives angle a1-a2=56 ± 2 that throttle axles 12 rotate °.By amplification, improved the precision of acquisition of signal greatly to mechanical action.

Secondly, be the electromagnetic induction device part.Electromagnetic induction device is installed in the pedal another side, is positioned at the outside of baffle plate 1.It comprises magnet 13, permanent magnet 14, electronic cartridge 15, circuit card 17, programmable hall element 16; Wherein magnet 13, permanent magnet 14 are fixedly connected on the outer end of throttle axle 12 towards electronic cartridge 15, and magnet 13, permanent magnet 14 have the vestibule of a corresponding electronic cartridge 15, and programmable hall element 16 is fixedly connected on the electronic cartridge 15, and stretches in the vestibule.When magnet 13, permanent magnet 14 rotated together in company with throttle axle 12, the programmable hall element 16 that does not rotate can collect the variation of magnetic flow.

Groundwork principle of the present utility model is described at last, it is that the voltage signal that angular transposition when adopting the programmable hall sensor non-contactly the transaxle pedal move is converted to 0.375V～4.2V is exported, to satisfy the required EFI control signal voltage of car engine control unit (ECU).It comprises the following content:

The actuation range of A, transaxle pedal is about about 0 °～19 °, and in order to increase the dynamic range that is converted to rotating field, the way by machinery can expand 0 °～19 ° angular transposition to about 0 °～60 ° anglec of rotation.

The rotation of the angle of B, this amplification drives magnetizers 13 and permanent magnet 14 by throttle axle 12 and follows throttle axle 12 and rotate together, to produce one vertically and the left side of programmable hall element 16, the right rotating field.

C, in the rotating range on this rotating field plane to programmable hall element 16 programming, this induced field will change size and positive-negative polarity along with the rotation of permanent magnet.

D, use Hall element rotate the magnetic-field intensity that changes size and Orientation with this with permanent magnet and change voltage signal output into.If selected change of magnetic field strength scope drops on the linear work district of Hall element, then the voltage signal of being changed will be linear with the angle of rotating field.

The output signal of E, Hall element can produce the output voltage signal that satisfies engine control unit (ECU) EFI input request signal through the circuit adjustment.

F, circuit must satisfy low-power consumption, the requirement of great dynamic range and anti-power supply interfering signal.The making of circuit card should need the satisfied extremely interior requirement of limited bulk that is installed in simultaneously.

G, since ECU (engine control unit) require accelerator pedal when action simultaneously two independent but the synchronous degree of signal require to use two independently Hall element treatment circuits into ± 0.05V, to satisfy the requirement of ECU.

Programmable hall device 16 is at first gathered the voltage signal of initial magnetic field, exports the voltage (is 5 volts based on added operating voltage) as 2.5 volts, and the enhancing output voltage rising along with magnetic field enters the clamper district up to the programmable hall device; To export voltage less than 2.5 volts to reciprocal magnetic field hall device, along with reciprocal magnetic field increases, the output voltage of hall device drops to and enters the clamper district.The output signal of hall device exports ECU to via filter circuit.Level is handled the indication of electric signal and is made output signal level meet the requirement of ECU to the accelerator pedal output signal level.Because ECU (engine control unit) needs input two-way analog level signal, so side circuit has two sensors and two-way voltage treatment circuit.

Claims (2)

1, the transaxle pedal of pedal angular displacement transmitter, comprise stretcher, base plate, stretcher links to each other by the elastic reset linkwork that is arranged on both roots with base plate, it is characterized in that, also be provided with pedal angle enlarger at the middle part of stretcher and base and detect the electromagnetic induction device of stretcher with respect to the timely angle variable quantity of base plate.

2, the transaxle pedal of pedal angular displacement transmitter according to claim 1, it is characterized in that, described pedal angle enlarger comprises interconnective throttle axle, baffle plate one, baffle plate two, roller, retracing spring one, retracing spring two and attaching parts, and corresponding described roller is provided with the roller road on the base plate; Described electromagnetic induction device comprises magnet, permanent magnet, electronic cartridge, circuit card, programmable hall element; Electromagnetic induction device is arranged on the outside of baffle plate one, magnet, permanent magnet are fixedly connected on the outer end of throttle axle towards electronic cartridge, constitute the vestibule of a corresponding electronic cartridge, described programmable hall element is fixedly connected on the electronic cartridge, and stretches in the described vestibule.

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