CN103253270A - Method and device for lightening pause during shifting up - Google Patents

Abstract

The invention belongs to the technical field of pause prevention during gear combination, and particularly relates to a method and a device for lightening pause during shifting up. The method comprises the following steps that (1) a controller detects the current gear m and the running speed v when an automobile runs; (2) the controller calculates the required rotating speed n of an engine when the automobile is kept at the running speed v and at the gear m+1; (3) the controller receives separation signals of the engine and a speed changer; (4) the controller controls the rotating speed of the engine at the rotating speed n, and enables the engine to be kept at the rotating speed n for t seconds; (5) a driver engages the gear m+1 or the gear m-1 in t seconds. According to the method and the device for lightening the pause during shifting up, after the driver steps on the clutch, the rotating speed of the engine is controlled at the required rotating speed n of the engine when the automobile put into the gear m+1 is kept at the running speed v. As the rotating speed of the engine is also the rotating speed n at the moment, the rotating speed difference between the rotating speed of the engine and the rotating speed of an intermediate shaft, and the problem of the pause during shifting up is resolved.

Description

A method and device for alleviating car shakiness when upshifting

technical field

The invention belongs to the technical field of preventing overhanging when gears are combined, and in particular relates to a method and device for alleviating overhanging when upshifting.

Background technique

The general steps for shifting gears in a manual transmission car are as follows:

Step 1: step on the clutch and release the accelerator, and the car enters the idling state at this time;

Step 2: Engage in the desired gear;

Step 3: Lift the clutch and refuel.

Manual transmission models generally have different degrees of shifting and shaking when upshifting. This kind of shaking is caused by the speed difference between the engine and the intermediate shaft before and after the clutch is engaged during the upshift.

This towering car affects the driving comfort of the whole vehicle and reduces the running quality of the whole vehicle.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a method and device for alleviating the overhanging during upshifting, so as to solve the overhanging during upshifting.

In order to achieve the above object, the present invention provides the following technical solutions:

A method for mitigating car shrugging during upshifts, the method comprising the steps of:

Step 1: The controller detects the gear position m and the driving speed v when the car is running;

Step 2: The controller calculates the speed n of the engine required to keep the car at the driving speed v at the gear position m+1;

Step 3: The controller receives the engine and transmission separation signal;

Step 4: The controller controls the speed of the engine to speed n, and keeps the engine at the speed n for t seconds;

Step 5: The driver shifts into the gear position m+1 or gear position m-1 within the t seconds.

Preferably, in Step 5, the controller controls the engine to enter the idling state after the t second.

Preferably, the controller is an engine management system.

Preferably, when the car is in gear m-1, the engine speed required to keep the car at the driving speed v is the speed w, and the engine speed when the car is idling is the speed y;

The difference between the rotational speed w and the rotational speed n is smaller than the difference between the rotational speed w and the rotational speed y.

The present invention also provides a device for mitigating the bumping of the car when upshifting, and the device includes the following units:

Detection unit: detect the in-shift gear position m and the driving speed v when the car is running;

Calculation unit: calculate the speed n of the engine required to keep the car at the driving speed v when the gear is m+1;

Receiving unit: receive the engine and transmission separation signal;

The control unit: controls the engine speed to a speed n, and keeps the engine at the speed n for a time of t seconds.

Embodiments of the present invention at least have the following technical effects:

1) The present invention controls the engine speed n after the driver steps on the clutch to the gear position m+1, and the car is kept at the required engine speed n at the driving speed v; At this time, the speed of the intermediate shaft is speed n, and since the speed of the engine is also speed n at this time, the speed difference between the engine speed and the speed of the intermediate shaft is reduced, and the problem of shrugging when upshifting is solved.

2) The present invention controls the engine speed n after the driver steps on the clutch to the speed n of the engine required for the car to maintain the speed v when the car is in gear m+1; Function, the speed of the intermediate shaft at this time is the speed w, because the gear position m-1 is smaller than the gear position m+1, so the speed w is greater than the speed n at this time;

If the difference between the rotational speed w and the rotational speed n is smaller than the difference between the rotational speed w and the rotational speed y, then the present invention can also alleviate the problem of shunting when downshifting.

Description of drawings

Fig. 1 is the schematic diagram that transmission transmits engine power;

Fig. 2 is a flow chart of the steps of shifting operation when the embodiment of the method of the present invention is in gear position m;

Fig. 3 is a flow chart of the steps of shifting operation in gear position n according to the method embodiment of the present invention;

Fig. 4 is the flow chart of the steps of shifting operation in fifth gear according to the method embodiment of the present invention;

The numbers in the figure are as follows:

100-shift lever;

201-shaft ring, 202-shift fork;

300-power input shaft;

400-power output shaft;

500-intermediate shaft;

601-driving gear, 602-driven gear;

700 - Drive wheels.

The same reference numerals indicate similar or corresponding features or functions throughout the drawings

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, specific embodiments will be described in detail below with reference to the accompanying drawings.

As shown in Figure 1, the shift lever 100 drives the shift fork 202 and the collar 201 to move left and right, so that the collar 201 engages with a driven gear 602; in this way, the power provided by the engine passes through the power input shaft 300 and the driving gear 601 in sequence 1. The driven gear 602 transmits power to the power output shaft 400, and the power output shaft 400 transmits power to the differential (not shown in the figure). The driving gear 601 is fixedly connected with the intermediate shaft 500 , and the drive wheel 700 is fixedly connected with the power input shaft 300 .

An embodiment of the present invention provides a method for alleviating a car crash during an upshift, the method comprising the following steps:

Step 1: The controller detects the gear position m and the driving speed v when the car is running;

Step 2: The controller calculates the speed n of the engine required to keep the car at the driving speed v at the gear position m+1;

Step 3: The controller receives the engine and transmission separation signal;

Step 4: The controller controls the speed of the engine to speed n, and keeps the engine at the speed n for t seconds;

Step 5: The driver shifts into the gear position m+1 or gear position m-1 within the t seconds. The present invention controls the engine speed n after the driver steps on the clutch to the gear position m+1, and the car maintains the engine speed n required by the driving speed v; Function, at this time the speed of the intermediate shaft is speed n, and since the speed of the engine is also speed n at this time, the speed difference between the engine speed and the speed of the intermediate shaft is reduced, and the problem of shrugging when upshifting is solved.

Specifically, please refer to Fig. 2 and Fig. 3 . In Fig. 2 and Fig. 3, the engaged gear m is not the highest gear, and the gear n is the highest gear. The "new current gear" in Fig. 3 can be neutral gear or gear n-1.

As a preferred solution, in step five of this embodiment, the controller controls the engine to enter the idling state after the t second.

Fig. 4 is a flow chart of the steps of shifting operation in the fifth gear according to the method embodiment of the present invention. In FIG. 4, the time t seconds is 2 seconds, and in other embodiments, t can be set according to needs.

Assumptions:

The driving speed v is 60kph;

In order to maintain the above driving speed v, the speed of the engine in different gears is as follows:

Second gear: 4000 rpm;

Third gear: 3500 rpm;

Fourth gear: 3000 rpm;

Fifth gear: 2600 rpm;

Sixth gear: 2000 rpm;

The rotational speed y is 800 rpm when idling.

As shown in Figure 4, when the shift position m is the fifth gear, the speed n is 2000 rpm when the speed n is the sixth gear; and the speed w is 3000 rpm when the speed w is the fourth gear.

As shown in Figure 4, the controller detects that the gear m in gear when the car is running is the fifth gear, and the driving speed v is 60kph; the controller calculates the engine required to keep the car at the driving speed v of 60kph when the car is in gear six. The rotational speed n of the engine is 2000 rpm; after the driver steps on the clutch, the controller receives a signal to separate the engine from the transmission; the controller controls the rotational speed of the engine to 2000 rpm, and keeps the rotational speed of 2000 rpm for 2 seconds; within 2 seconds, the driver Hang into the sixth gear or the fourth gear, the specific analysis is as follows:

Upgrading to sixth gear: If the car is upgraded to sixth gear with the existing technology, the engine speed will be reduced to 800 rpm when idling after stepping on the clutch and releasing the accelerator, and the 500 rpm of the intermediate shaft is 2000 rpm when the sixth gear is used, a difference of 1200 Turn; If control automobile with the method of the present invention and be promoted to six gears, then the engine speed is 2000 revolutions when the sixth gears, and the countershaft speed is 2000 revolutions, and the difference is 0 revolutions, thereby eliminating the car problem when upshifting;

Downgrade to fourth gear: If the car is downgraded to fourth gear with the existing technology, the engine speed will be reduced to 800 rpm when idling after stepping on the clutch and releasing the accelerator, and the 500 rpm of the intermediate shaft is 3000 rpm when the fourth gear is used, with a difference of 2200 Turn; if control automobile with the present invention down to four gears, then the engine speed is 2000 revolutions when the sixth gear, and the intermediate shaft speed is 3000 revolutions when the fourth gears, a difference of 1000 revolutions, can also slow down the car when downshifting question.

As a preferred solution, the controller of the present invention is an engine management system EMS. The EMS calculates the required air-fuel mixture ratio and the ignition advance angle of the engine based on the input data from various sensors, and then combines the corresponding control methods to directly control the fuel supply and fuel injection timing of the engine under various working conditions. Timing, high-voltage ignition timing, etc., to achieve different engine speeds, engine torque outputs, and other working states of accessory systems.

In addition, as can be seen from Fig. 1, the present invention chooses to control the engine speed to eliminate the speed difference between the engine and the intermediate shaft, because the shift lever 100, the collar 201, the shift fork 202, the power input shaft 300, and the power output shaft 400 , intermediate shaft 500, driving gear 601, and driven gear 602 are all pure mechanical parts, which cannot be accurately controlled.

The present invention also provides a device for mitigating the bumping of the car when upshifting, and the device includes the following units:

Detection unit: detect the in-shift gear position m and the driving speed v when the car is running;

Calculation unit: calculate the speed n of the engine required to keep the car at the driving speed v when the gear is m+1;

Receiving unit: receive the engine and transmission separation signal;

The control unit: controls the engine speed to a speed n, and keeps the engine at the speed n for a time of t seconds.

The above detection unit, calculation unit, receiving unit and control unit are all integrated in the controller, that is, the engine management system described in this embodiment.

It can be seen from the above that the embodiments of the present invention have the following advantages:

1) The present invention controls the engine speed n after the driver steps on the clutch to the gear position m+1, and the car maintains the engine speed n required by the driving speed v; At this time, the speed of the intermediate shaft is speed n, and since the speed of the engine is also speed n at this time, the speed difference between the engine speed and the speed of the intermediate shaft is reduced, and the problem of shrugging when upshifting is solved. That is, the engine is stabilized at the target speed in advance, making the combination of gears smoother and effectively improving the comfort of gear shifting.

2) The present invention controls the engine speed n after the driver steps on the clutch to the speed n of the engine required for the car to maintain the speed v when the car is in gear m+1; Function, the speed of the intermediate shaft at this time is the speed w, because the gear position m-1 is smaller than the gear position m+1, so the speed w is greater than the speed n at this time;

If the difference between the rotational speed w and the rotational speed n is smaller than the difference between the rotational speed w and the rotational speed y, then the present invention can also alleviate the problem of shunting when downshifting.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (5)

1. a method of alarmming car when alleviating upshift is characterized in that this method comprises the steps:

Step 1: when controller detects running car at engage a gear position m and the speed of a motor vehicle v that is expert at;

Step 2: controller calculating automobile when gear m+1 remains on the rotation speed n of the required driving engine of the fast v of driving;

Step 3: controller receives driving engine and change-speed box separation signal;

Step 4: controller is controlled to be rotation speed n with the rotating speed of driving engine, and driving engine is kept the time t second of described rotation speed n;

Step 5: described t in second chaufeur hang into gear m+1 or gear m-1.

2. method according to claim 1 is characterized in that:

In step 5, surpass described t second control control driving engine and enter the idling motoring condition.

3. method according to claim 1 is characterized in that:

Described controller is engine management system.

4. method according to claim 1 is characterized in that:

To remain on the rotating speed of driving fast v required driving engine be rotating speed w to automobile when gear m-1, and the engine speed of automobile when idling is travelled is rotating speed y;

The difference of described rotating speed w and rotation speed n is poor less than rotating speed w and rotating speed y's.

5. device of alarmming car when alleviating upshift is characterized in that this device comprises as lower unit:

Detecting unit: when detecting running car at engage a gear position m and the speed of a motor vehicle v that is expert at;

Calculating unit: calculating automobile when gear m+1 remains on the rotation speed n of the required driving engine of the fast v of driving;

Receiving element: receive driving engine and change-speed box separation signal;

Control unit: the rotating speed of driving engine is controlled to be rotation speed n, and driving engine is kept the time t second of described rotation speed n.

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