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Control method of automobile starting for manual transmission

A manual transmission and car starting technology, which is applied in engine control, machine/engine, mechanical equipment, etc., can solve the problems of heavy vehicle weight, easy flameout, and inability to recognize driver's intention in advance, so as to ensure smooth start, The effect of preventing flameout at start

Active Publication Date: 2012-06-27
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

The disadvantage of this control method is that the increase of engine torque is only considered before the engine is about to turn off, and the driver's intention cannot be recognized in advance. Small, but the weight of the vehicle is often very large, it is more necessary to identify the driver's starting intention in advance, so as to increase the engine torque in advance to overcome the starting inertia

Method used

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  • Control method of automobile starting for manual transmission
  • Control method of automobile starting for manual transmission
  • Control method of automobile starting for manual transmission

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Embodiment Construction

[0019] The present invention is characterized in that: the ECU collects the clutch displacement signal according to the clutch stroke sensor to identify the starting intention, and before the clutch is engaged, the engine throttle, the engine speed, and the engine torque are increased step by step, and the steps are as follows:

[0020] In the first step, the driver stepped on the clutch to completely disengage the clutch, and the clutch displacement reached 100%; the ECU increased the engine speed from idle speed to about 900rpm, and was ready to start; the ECU controlled the engine throttle to increase by 2%, and the engine torque was basically maintained constant;

[0021] In the second step, the driver is releasing the clutch and preparing to start, so that the clutch is completely disengaged to half engaged, and the clutch displacement reaches 72%; the ECU stabilizes the engine speed at about 900rpm, which has ensured the smooth start; at the same time, the ECU controls th...

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Abstract

The invention discloses a control method of automobile starting for a manual transmission, which is characterized in that an electronic control unit (ECU) collects clutch displacement signals to identify starting intension according to a clutch stroke sensor and adds an engine throttle valve, and increases the speed of an engine and the torque of the engine step by step before the clutch engages. The steps are as follows: first step, a driver presses a clutch to enable the clutch to be completely separated, and the torque of the engine is fundamentally kept unchanged; second step, the driver is loosening the clutch to be about to start the automobile and enables the clutch to change from complete separation to half engagement, and the torque of the engine gradually increases; and third step, the driver completely loosens the clutch to finish starting the automobile and enables the clutch to be completely engaged, and the torque of the engine recovers normal control logic. By means of the method, rotating speed and torque of the engine can be increased in advance before half engagement of the clutch so that starting stability is ensured, and starting flameout is avoided.

Description

technical field [0001] The invention relates to a control method for an automobile transmission system, in particular to a control method for starting a manual transmission automobile. technical background [0002] The starting condition of a manual transmission vehicle varies with the load, road conditions, weather conditions, and driver proficiency, that is, the clutch control is a control system with multiple control objectives and multiple influencing factors. With the increasing application of turbocharging technology in automobiles, although the torque of the engine is significantly increased, it also increases the workload of the manual transmission. At the same time, the relatively lower torque at low speeds sometimes makes it more difficult to start Therefore, the service life of the parts will also be reduced, especially when the clutch is started on a slope with a trailer, the temperature of the clutch will be too high, especially for small-displacement gasoline e...

Claims

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Application Information

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IPC IPC(8): F02D11/00
Inventor 姜凤翔韩涌波黄利华
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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