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
CN102259648AActive Publication Date: 2011-11-30SINO TRUK JINAN POWER
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SINO TRUK JINAN POWER
Publication Date
2011-11-30

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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.
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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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