CN104764614B - Automobile driving mode emission testing method - Google Patents

Abstract

The invention discloses an emission test method of an automobile working condition method. During the test, the automobile is located in a test environment chamber and is in an overhead state, and the test environment chamber provides temperature environment simulation; then, according to the test standard, the accelerator pedal of the vehicle is stepped on so that the wheels accelerate to After testing the standard speed, stabilize the speed at the same speed and maintain it according to the test standard for a period of time, and then check whether the exhaust emission of the vehicle reaches the standard; it is characterized in that the throttle control device of the vehicle working condition method of the mechanical structure is obtained in advance, and the device is used Installed on the test vehicle to replace manual stepping on the accelerator pedal to control. The state-of-the-art emission test of the present invention can replace the manual stepping on the gas pedal to ensure the stability of gas pedal control, improve the test accuracy, and ensure the integrity of the test vehicle. And it has the advantages of simple implementation, convenient, fast, stable and reliable operation.

Description

A kind of test method of vehicle operating condition method emission

technical field

The invention relates to the technical field of automobile emission tests, in particular to an emission test method of an automobile working condition method.

Background technique

Before the automobile is produced and leaves the factory, it is necessary to carry out the emission test of the vehicle operating condition method to check whether the engine emission can meet the requirements when the vehicle is in different environments. During the emission test of the vehicle working condition method, the vehicle is located in the test environment chamber and is in an overhead state, and the test environment chamber provides different temperature environment simulations. Then it is necessary to depress the accelerator pedal of the vehicle to accelerate the wheels to a certain speed, then stabilize at a certain speed and maintain it for a certain period of time.

In the prior art, the vehicle operating condition method emission test generally relies on manual operation to step on the gas pedal, but if the gas pedal is manually stepped on for a long time, the pedaling stability will be poor, the applied force will fluctuate greatly, and errors will occur. Especially when the test environment cabin is used for high temperature environment simulation, it is particularly serious. Accurate data is required in the data collection of the vehicle research and development process, and unstable operation will lead to inaccurate data collection. Therefore, it is extremely difficult to step on the accelerator completely manually, and the vehicle speed will be restarted if there is a fluctuation in the maintenance process. Sometimes trial and error is required, labor-intensive, laborious and distorted test data.

my country's patent application number 200920095038.6 once disclosed a mechanical control device for gas pedal, which is made up of a screw mandrel, a fixed nut and an adjustment knob. The fixed nut is installed on the screw mandrel, and the adjustment knob is installed at the end of the screw mandrel. There is a linear relationship between the number of rotations of the adjusting knob and the stroke of the screw rod, and the opening of the throttle can be precisely controlled by changing the number of rotations of the adjustment knob.

In the device of the above-mentioned patent, the control of the accelerator pedal can be realized by the cooperation of the screw and the nut, but the device is installed on the chassis dynamometer of the whole vehicle and cannot be directly used in the interior of the vehicle. The structure of the vehicle itself cannot be damaged, so the device cannot be directly used in the vehicle's working condition emission test.

Contents of the invention

Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: how to provide a vehicle operating condition method emission test method that can ensure the stability of throttle control, improve the test accuracy, and ensure the integrity of the test vehicle.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solution: in the solution, the direction is described based on the state of use of the device.

A vehicle emission test method based on the working condition method. During the test, the vehicle is located in the test environment chamber and is in an overhead state. The test environment chamber provides temperature environment simulation; then according to the test standard, the vehicle accelerator pedal is stepped on to accelerate the wheels to the test standard speed. , stabilize at the same speed and maintain it for a period of time according to the test standard, and then check whether the exhaust emission of the vehicle reaches the standard; it is characterized in that the throttle control device of the vehicle working condition method emission test with the following structure is obtained in advance, and the device is installed on the test vehicle It replaces manual stepping on the accelerator pedal to control;

The throttle control device for the emission test of the automobile working condition method includes a throttle adjustment screw and a throttle adjustment nut that are threaded together, and also includes a horizontally arranged bottom plate and a bottom plate fixing device for fixing the bottom plate. The throttle adjustment nut is slanted The fixed support is arranged above one end of the base plate, and a long throttle plate is arranged under the throttle adjusting nut. The lower end of the throttle plate is rotatably arranged on the upper surface of the base plate. The force-applying end of the pedal, the lower end of the accelerator adjusting screw rod is set directly against the upper surface of the accelerator pressing plate and can be used to press the accelerator pressing plate;

The bottom plate fixing device includes a four-bar linkage mechanism formed by hinged ends of four connecting rods. A pair of opposite corners of the four-bar linkage mechanism form abutting ends for abutting against the driver's seat and the driver's console of the car. The rod mechanism is provided with an angle adjustment structure for controlling the diagonal opening and closing angles, thereby being able to adjust the distance between the two abutting ends. The four-bar linkage mechanism is also provided with a pressing screw rod, which is set vertically as a whole and It is rotatably fitted in a compression nut fixed on the four-bar linkage mechanism, and the lower end of the compression screw is used to bear against the bottom plate and achieve compression and fixation;

During the test, first fit the bottom plate to the position behind the accelerator pedal on the bottom surface of the test vehicle cockpit, and make the upper end of the accelerator pressure plate overlap the accelerator pedal; then use the four-bar linkage to align the two abutting ends of the vehicle The driver's seat and the driver's console, then adjust the diagonal opening and closing angle of the four-bar linkage mechanism by the angle adjustment structure, and then control the opening of the abutting end so that the four-bar linkage mechanism is tightly fixed between the driver's seat and the driver's console, and then adjust the pressure Tighten the screw so that the lower end of the screw sticks downward against the bottom plate and realize the compression and fixation of the bottom plate; after fixing the bottom plate, turn the throttle adjustment screw to make it move downward and exert force on the accelerator pressure plate downwards, through which the accelerator pedal Press it down to the required angle, and then you can carry out the working condition method emission test. In this way, it can replace the manual stepping on the gas pedal to ensure the stability of gas pedal control and improve the test accuracy.

In this way, the present invention adopts a mechanical structure instead of manually realizing the action of stepping on the accelerator to ensure the stability of the accelerator control and improve the test accuracy. Among them, the accelerator pressure plate connected with the lower end and the bottom plate is set to apply force to the accelerator pedal, which can better simulate the effect of human foot pedaling (the human foot pedaling the accelerator is also the heel ground as the fulcrum, and the toe is rotated downward to step on the accelerator pedal to apply force), Guarantee the reliability of the test. At the same time, the bottom plate fixing device adopted is used to fix the bottom plate during the test. It has the advantages of simple structure, very convenient and fast completion of the bottom plate fixing operation, good fixing effect, and no damage to the structure of the vehicle itself.

As an optimization, a return spring for upwardly urging the accelerator press plate is provided between the lower surface of the accelerator press plate and the bottom plate. In this way, after the test is completed, the throttle adjustment screw rod is removed, and the throttle pressure plate can be reset better.

As an optimization, the accelerator press plate has a lower half section arranged obliquely and an upper half section bent downward, and the upper end of the accelerator press plate is bent upward as a whole to form the force application end. Wherein, the lower end of the throttle adjustment screw rod is set directly against the lower half of the throttle pressure plate. In this way, it is more convenient for the transmission of force and the force applied by simulating the pedaling of human feet. Changing the direction of force application and the torque direction of the lever is also conducive to more accurate fine-tuning of the throttle adjustment screw, improving the accuracy of the control and adjustment of the opening and closing degree of the accelerator pedal, and improving the pedaling stability. reliability and detection reliability.

As an optimization, the upper end of the throttle adjustment screw is also provided with a throttle adjustment screw turntable, and the throttle adjustment screw turntable is fixed on the upper end of the throttle adjustment screw by the inner cross connecting rod. This is more convenient to apply force to rotate the throttle adjustment screw to adjust its up and down position to complete the test process.

Further, a compression screw turntable is fixed vertically on the upper end of the compression screw. This makes it easy to rotate the compression screw to adjust the applied force.

As an optimization, the angle adjustment structure includes an angle adjustment screw rod, which has two connection points for connecting with different connecting rods in the four-bar linkage mechanism, and the angle adjustment screw rod on one of the connection points The connecting rod at this place is rotatable and axially limited. An angle adjustment nut is arranged on the connecting rod at the other connection point. The angle adjustment screw rod is rotatably fitted in the angle adjustment nut. The angle adjustment nut can Rotatably mounted on the corresponding connecting rod.

In this way, during the test, the diagonal opening and closing angle of the four-bar linkage mechanism can be adjusted only by rotating the angle adjustment screw to make the position between the two connection points closer or farther away, so as to realize the adjustment between the two abutting ends. distance adjustment. Therefore, it has the advantages of simple structure, convenient and fast operation, reliable adjustment and control, etc.

Further, the angle adjusting screw rod is arranged vertically as a whole, and the upper end extends upwards out of a four-bar linkage mechanism, and an angle adjusting screw screw turntable is fixed vertically at the end. In this way, it is more convenient to adjust the applied force.

As an optimization, the four-bar linkage mechanism is arranged vertically, and each link is composed of a pair of vertically spaced splints connected by hinge shafts at both ends. The compression nut, angle adjustment nut, compression screw and angle The adjusting screw rods are clamped in the splint. In this way, the overall structure of the four-bar linkage mechanism is more stable and reliable, the applied force is more balanced and stable, and the test stability and reliability are improved.

As an optimization, among the pair of abutting ends, the abutting end used to abut against the driver's seat of the car is provided with an L-shaped driver's seat abutment plate with the inner corner facing outwards, which is used for abutting against the driver's seat of the car A plate-shaped driver's platform abutment plate is provided at the end of the driver's seat, and the respective backs of the driver's seat abutment plate and the driver's platform abutment plate are rotatably connected to the hinge shaft of the corresponding abutment end by an outwardly protruding lug seat. In this way, the stress between the two abutting ends, the driver's seat and the driver's platform is more convenient, and the reliability and stability of fixing are greatly improved.

Further, an abutting seat is also provided on the bottom plate, the upper end of the abutting seat is provided with an insertion hole for inserting the lower end of the pressing screw rod, and the lower end of the abutting seat is arranged horizontally and perpendicularly to the direction of the plane where the four-bar linkage mechanism is located. The rotating shaft is rotatably installed on a pair of lug seats on the base plate. In this way, when the front and rear positions of the bottom plate can be flexibly adjusted or the inclination angle of the pressing screw rod is different, the rotation of the abutting seat can be used to ensure that the pressing screw rod is exerting force on the insertion hole, and it can be stably pressed in after being converted by the abutting seat. On the bottom plate, it is possible to stably and reliably press and fix the bottom plate even when the opening and closing angles of the four-bar linkage mechanism are different for different models.

To sum up, in the state-of-the-art emission test of the present invention, it can replace manual stepping on the accelerator, ensure the stability of the accelerator control, improve the test accuracy, and ensure the integrity of the test vehicle. And it has the advantages of simple implementation, convenient, fast, stable and reliable operation.

Description of drawings

Fig. 1 is the structure schematic diagram of the throttle control device of the automobile operating condition method emission test adopted when the present invention is implemented.

Fig. 2 is a schematic diagram of the use state of the device shown in Fig. 1 .

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings.

During the specific implementation: a method of emission test of automobile working condition method. During the test, the automobile is located in the test environment cabin and is in an overhead state. The test environment cabin provides temperature environment simulation; After testing the standard speed, stabilize the speed at the same speed and maintain it according to the test standard for a period of time, and then check whether the exhaust emission of the vehicle reaches the standard; its characteristic is that the throttle control device of the vehicle working condition method with the following structure is obtained in advance, and the device is used Installed on the test vehicle instead of manually stepping on the accelerator pedal to control;

The vehicle working condition method emission test throttle control device, as shown in Figure 1 and Figure 2 during specific implementation, includes a throttle adjustment screw 1 and a throttle adjustment nut 2 that are threaded with each other, wherein it also includes a horizontally arranged bottom plate 3 And the base plate fixing device for fixing the base plate 3, the throttle adjustment nut 2 is obliquely fixedly supported above one end of the base plate, and a long strip-shaped throttle pressure plate 4 is arranged below the throttle adjustment nut 2, and the lower end of the throttle pressure plate 4 is rotatable. It is arranged on the upper surface of the bottom plate 3, and the upper end of the accelerator pressure plate 4 extends out of the bottom plate obliquely forward as a whole and forms a force application end 5 for contacting the accelerator pedal. Tighten the throttle pressure plate 4.

In this way, the accelerator pressure plate that is connected to the lower end and the bottom plate is arranged to apply force to the accelerator pedal, which can better simulate the effect of human feet stepping on the accelerator (the human foot steps on the accelerator and also uses the heel as the fulcrum, and turns downwards to step on the accelerator pedal to apply force). Guarantee the reliability of the test.

Wherein, between the lower surface of the accelerator press plate 4 and the bottom plate, a return spring 6 for exerting force upward on the accelerator press plate is arranged. In this way, after the test is completed, the throttle adjustment screw rod is removed, and the throttle pressure plate can be reset better.

Wherein, the accelerator pressing plate 4 has a lower half section arranged obliquely and an upper half section bent downward, and the upper end of the accelerator pressing plate 4 is bent upwards as a whole to form the force applying end 5 . Wherein, the lower end of the throttle adjustment screw rod is set directly against the lower half of the throttle pressure plate. In this way, it is more convenient for the transmission of force and the force applied by simulating the pedaling of human feet. Changing the direction of force application and the torque direction of the lever is also conducive to more accurate fine-tuning of the throttle adjustment screw, improving the accuracy of the control and adjustment of the opening and closing degree of the accelerator pedal, and improving the pedaling stability. reliability and detection reliability.

Wherein, the upper end of the throttle adjustment screw rod 1 is also provided with a throttle adjustment screw rod turntable 7, and the throttle adjustment screw rod turntable 7 is fixed on the upper end of the throttle adjustment screw rod 1 by the inner cross connecting rod. This is more convenient to apply force to rotate the throttle adjustment screw to adjust its up and down position to complete the test process.

Wherein, the bottom plate fixing device includes a four-bar linkage mechanism 8 formed by hinged ends of four connecting rods, and a pair of opposite corners of the four-bar linkage mechanism 8 are formed to abut against the driver's seat 9 and the driver's platform 10. At the abutment end, the four-bar linkage mechanism is provided with an angle adjustment structure for controlling the diagonal opening and closing angle and thereby can adjust the distance between the two abutment ends. The four-bar linkage mechanism is also provided with a compression screw 11, the compression wire The rod 11 is arranged vertically as a whole and is rotatably fitted in a compression nut 12 fixed on the four-bar linkage mechanism. The lower end of the compression screw 11 is used to bear against the bottom plate 3 and realize compression and fixation.

In this way, the utility model has the advantages of simple structure, very convenient and rapid completion of the bottom plate fixing operation, good fixing effect, and no damage to the structure of the vehicle itself.

Wherein, the upper end of the pressing screw is vertically fixed with a pressing screw turntable 13 . This makes it easy to rotate the compression screw to adjust the applied force.

Wherein, the angle adjustment structure includes an angle adjustment screw rod 14, and there are two connection points for connecting with different connecting rods in the four-bar linkage mechanism on the angle adjustment screw rod 14, and the angle adjustment wire on one of the connection points The rod and the connecting rod at this place are rotatable and axially limited connections (in this embodiment, the connection point is located at the lower end of the angle adjustment screw rod, and a circle of radial bosses can be set at the lower end of the angle adjustment screw rod. The boss is rotatably matched in a mounting groove of the four-bar linkage mechanism to realize the axial limit), and the connecting rod at the other connection point is provided with an angle adjustment nut 15, and the angle adjustment screw rod 14 is rotatably matched with Inside the angle adjusting nut 15, the angle adjusting nut 15 is rotatably installed on the corresponding connecting rod.

In this way, during the test, the diagonal opening and closing angle of the four-bar linkage mechanism can be adjusted only by rotating the angle adjustment screw to make the position between the two connection points closer or farther away, so as to realize the adjustment between the two abutting ends. distance adjustment. Therefore, it has the advantages of simple structure, convenient and fast operation, reliable adjustment and control, etc.

Wherein, the angle adjusting screw rod 14 is arranged vertically as a whole, and the upper end extends upwards to form a four-bar linkage mechanism, and an angle adjusting screw rod turntable 16 is fixed vertically at the end. In this way, it is more convenient to adjust the applied force.

Among them, the four-bar linkage mechanism 8 is arranged vertically, and each connecting rod is formed by connecting the two ends of a pair of splints 17 vertically spaced apart by hinge shafts. The compression nut 12, the angle adjustment nut 15, the compression wire Both the rod 11 and the angle adjusting screw 14 are clamped in the splint. In this way, the overall structure of the four-bar linkage mechanism is more stable and reliable, the applied force is more balanced and stable, and the stability and reliability of the test are improved.

Among them, among the pair of abutting ends, the abutting end for abutting against the driver's seat of the car is provided with an L-shaped driver's seat abutting plate 18 with the inner corner facing outwards, which is used for abutting against the driver's seat of the car. The end is provided with a plate-shaped driver's platform abutment plate 19, and the respective backs of the driver's seat abutment plate and the driver's platform abutment plate are rotatably connected to the hinge shaft of the corresponding abutment end by an outwardly protruding lug seat. In this way, the stress between the two abutting ends, the driver's seat and the driver's platform is more convenient, and the reliability and stability of fixing are greatly improved.

Wherein, the bottom plate 3 is also provided with an abutment seat 20, the upper end of the abutment seat 20 is provided with a socket hole for inserting the lower end of the pressing screw rod, and the lower end of the abutment seat 20 is horizontally perpendicular to the position of the four-bar linkage mechanism. The rotating shaft 21 arranged in the plane direction is rotatably installed on a pair of lug seats on the bottom plate 3 . In this way, when the front and rear positions of the bottom plate can be flexibly adjusted or the inclination angle of the pressing screw rod is different, the rotation of the abutting seat can be used to ensure that the pressing screw rod is exerting force on the insertion hole, and it can be stably pressed in after being converted by the abutting seat. On the bottom plate, it is possible to stably and reliably press and fix the bottom plate even when the opening and closing angles of the four-bar linkage mechanism are different for different models.

In this way, during the test, the bottom plate is first fitted to the position behind the accelerator pedal on the bottom surface of the test vehicle cockpit, and the upper end of the accelerator pressure plate is lapped on the accelerator pedal; Align the car driver's seat and the driver's platform, and then adjust the diagonal opening and closing angle of the four-bar linkage mechanism by the angle adjustment structure, and then control the opening of the abutting end so that the four-bar linkage mechanism is tightly fixed between the car driver's seat and the driver's platform, and then Adjust the screw rod to make its lower end against the bottom plate and realize the compression and fixation of the bottom plate; after fixing the bottom plate, turn the throttle adjustment screw to make it move downward and exert force on the throttle pressure plate downwards, through the throttle pressure plate Depress the accelerator pedal to the desired angle, and then perform the emission test of the working condition method. In this way, it can replace the manual stepping on the gas pedal to ensure the stability of gas pedal control and improve the test accuracy.

Claims (9)

1. A method of emission test of automobile working condition method. During the test, the automobile is located in the test environment cabin and is in an overhead state, and the test environment cabin provides temperature environment simulation; then according to the test standard, the vehicle accelerator pedal is stepped down to make the wheels accelerate to the test standard After the speed is stabilized at this speed and maintained for a period of time according to the test standard, then check whether the exhaust emission of the vehicle is up to the standard; it is characterized in that the vehicle operating condition method emission test throttle control device with the following structure is obtained in advance, and the device is installed on the Instead of manual stepping on the accelerator pedal control on the test vehicle; The throttle control device for the emission test of the automobile working condition method includes a throttle adjustment screw and a throttle adjustment nut that are threaded together, and also includes a horizontally arranged bottom plate and a bottom plate fixing device for fixing the bottom plate. The throttle adjustment nut is slanted The fixed support is arranged above one end of the base plate, and a long throttle plate is arranged under the throttle adjusting nut. The lower end of the throttle plate is rotatably arranged on the upper surface of the base plate. The force-applying end of the pedal, the lower end of the accelerator adjusting screw rod is set directly against the upper surface of the accelerator pressing plate and can be used to press the accelerator pressing plate; The bottom plate fixing device includes a four-bar linkage mechanism formed by hinged ends of four connecting rods. A pair of opposite corners of the four-bar linkage mechanism form abutting ends for abutting against the driver's seat and the driver's console of the car. The rod mechanism is provided with an angle adjustment structure for controlling the diagonal opening and closing angles, thereby being able to adjust the distance between the two abutting ends. The four-bar linkage mechanism is also provided with a pressing screw rod, which is set vertically as a whole and It is rotatably fitted in a compression nut fixed on the four-bar linkage mechanism, and the lower end of the compression screw is used to bear against the bottom plate and achieve compression and fixation; During the test, first fit the bottom plate to the position behind the accelerator pedal on the bottom surface of the test vehicle cockpit, and make the upper end of the accelerator pressure plate overlap the accelerator pedal; then use the four-bar linkage to align the two abutting ends of the vehicle The driver's seat and the driver's console, then adjust the diagonal opening and closing angle of the four-bar linkage mechanism by the angle adjustment structure, and then control the opening of the abutting end so that the four-bar linkage mechanism is tightly fixed between the driver's seat and the driver's console, and then adjust the pressure Tighten the screw so that the lower end of the screw sticks downward against the bottom plate and realize the compression and fixation of the bottom plate; after fixing the bottom plate, turn the throttle adjustment screw to make it move downward and exert force on the accelerator pressure plate downwards, through which the accelerator pedal Press it down to the required angle, and then you can carry out the working condition method emission test. 2. The emission test method according to the automobile working condition method according to claim 1, characterized in that, a return spring for exerting force upward on the accelerator press plate is arranged between the lower surface of the accelerator press plate and the bottom plate. 3. The automobile working condition method emission test method according to claim 1, characterized in that, the accelerator press plate has a lower half section which is arranged obliquely and an upper half section which is folded downward to be arranged, and the upper end of the accelerator press plate is The entire portion is bent upwards to form the force application end. 4. The automobile operating condition method emission test method as claimed in claim 1, characterized in that, the upper end of the throttle adjusting screw rod is also provided with a throttle adjusting screw rotating disc, and the throttle adjusting screw rotating disc is fixed by an internal cross connecting rod At the upper end of the throttle adjustment screw. 5 . The method of emission test according to claim 1 , wherein a compression screw turntable is fixed vertically on the upper end of the compression screw. 6 . 6. The automobile working condition method emission test method as claimed in claim 1, wherein the angle adjustment structure comprises an angle adjustment screw rod, and there are two angle adjustment screw rods for different angles from the four-bar linkage mechanism. The connection points where the connecting rods are connected, the angle adjustment screw on one of the connection points and the connecting rod at this point are rotatable and axially limited connections, and the connecting rod at the other connection point is provided with an angle adjustment nut. The angle adjustment screw rod is rotatably fitted in the angle adjustment nut, and the angle adjustment nut is rotatably installed on the corresponding connecting rod. 7. The emission test method of the automobile working condition method according to claim 6, characterized in that, the angle adjusting screw is arranged vertically as a whole and the upper end extends upwards out of a four-bar linkage and is fixed vertically at the end with a Angle adjustment screw turntable. 8. The automobile working condition method emission test method as claimed in claim 6, wherein the four-bar linkage is arranged vertically, and each connecting rod is connected by a pair of splints arranged at vertical intervals by a hinged shaft. Composition, the compression nut, the angle adjustment nut, the compression screw rod and the angle adjustment screw rod are all sandwiched in the splint. 9. The automobile working condition method emission test method according to claim 1, characterized in that, among the pair of abutting ends, the abutting end for abutting against the driver's seat of the vehicle is provided with an L-shaped inner corner facing outwards. The abutment plate of the driver's seat is provided with a plate-shaped abutment plate for the abutment of the driver's platform, and the backs of the abutment plate of the driver's seat and the abutment plate of the driver's platform are respectively leaned on a protruding The lug seat is rotatably connected to the hinge shaft corresponding to the abutting end.