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A method for controlling the speed limit of amt vehicles

A control method and vehicle controller technology, applied in the field of speed limit control of AMT vehicles, can solve problems such as difficulty in achieving vehicle speed control effects, affecting the life of the brake system, and unsafe operation, so as to reduce labor intensity, improve safety, The effect of avoiding dangerous accidents

Active Publication Date: 2011-11-30
SINO TRUK JINAN POWER
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  • Summary
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AI Technical Summary

Problems solved by technology

Generally, the safe speed is set very low. It is generally difficult to achieve accurate speed control effect through conventional braking devices, and it also greatly affects the life of the braking system. In addition, the driver has no extra energy to Control the speed of the vehicle, the operation is unsafe, and the labor intensity is also increased

Method used

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  • A method for controlling the speed limit of amt vehicles
  • A method for controlling the speed limit of amt vehicles
  • A method for controlling the speed limit of amt vehicles

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Embodiment Construction

[0020] Such as figure 1 , 2 Shown, the control method of AMT vehicle type speed limit of the present invention, concrete steps are as follows:

[0021] a. The automatic transmission control unit TCU receives the current gear, engine speed and clutch slip rate signals detected by the sensor, and sends the above signals and the determined transmission chain combination state signal to the vehicle controller VCU, the vehicle The controller VCU simultaneously judges whether a special operation signal is received, if not, proceed to normal driving, and if so, proceed to step b;

[0022] b. The vehicle controller VCU calculates the maximum allowable gear and the maximum limit of the engine speed, and sends a command signal to the electronic control unit ECU in real time to detect whether the current gear is higher than the maximum allowable gear. If so, Go to step c, if not, go to step d;

[0023] c. The vehicle controller VCU sends a request for a gear shift command, reducing th...

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Abstract

The invention discloses a control method for speed limit of an AMT (Automatic Mechanical Transmission) type vehicle. The control method comprises the following steps that: a. an automatic TCU (Transmission Control Unit) receives a current gear signal, an engine revolution speed signal and a clutch slip ratio signal detected by a sensor, and transmits the signals and a determined driving chain combination state signal to a VCU (Vehicle Control Unit); b. the VCU calculates a maximum gear allowed to be switched and a maximum limit value of the engine revolution speed, real time transmits a command signal to an ECU (Electronic Control Unit) and detects whether the current gear is higher than the allowed maximum gear; c. the VCU transmits a gear-switching request command and reduces the current gear to be the allowed maximum gear; d. the ECU regulating a rail pressure and a fuel injection quantity according to the maximum limit value of the engine revolution speed so as to regulating the engine revolution speed to be lower than the maximum limit value; and e. a vehicle regularly runs. The invention has the beneficial effects of largely reducing the labor strength when effectively improving the safety of a driver.

Description

technical field [0001] The invention belongs to the technical field of a heavy-duty vehicle common rail engine speed control system and an automatic transmission control system, and in particular relates to a speed limit control method for an AMT vehicle. Background technique [0002] At present, there are many AMT (Automatic Mechanical Transmission) heavy-duty vehicles on the market, which should be used in airports, oil depots and other occasions, and the maximum speed is required to be controlled within a safe range during operation. Generally, the safe speed is set very low. It is generally difficult to achieve accurate speed control effect through conventional braking devices, and it also greatly affects the life of the braking system. In addition, the driver has no extra energy to Control the speed of the vehicle, the operation is unsafe, and the labor intensity has also been improved. Contents of the invention [0003] In order to solve the above technical deficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/00B60W10/10B60W10/06
Inventor 赵玉超郭鹏
Owner SINO TRUK JINAN POWER
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