External characteristic curve adjusting system and method of engine on automated mechanical transmission (AMT) vehicle type and vehicle

Abstract

The invention provides an external characteristic curve adjusting system and method of an engine on an automated mechanical transmission (AMT) vehicle type and a vehicle. An ABS module provides a vehicle speed signal to a finished vehicle electronic control unit; the finished vehicle electronic control unit analyses the travelled distance of a vehicle according to the vehicle speed signal transmitted by the ABS module; an electronic control unit module of the engine obtains the travelled distance of the vehicle, a preset engine external characteristic curve chart is inquired, a current correction factor of the engine is obtained, and the maximum torque of the engine under the current rotation speed is calculated based on a universal characteristic curve of the engine; according to the current maximum torque of the engine, an automatic transmission judges whether the maximum torque output by the engine can meet the current traveling driving force of the vehicle; and the gear calculatedby the automatic transmission is made more reasonable. In this way, controlled output over the automatic transmission can be achieved based on the actual capacity of the engine, and the current gear,speed per hour and the output torque of the engine are met.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine external characteristic curve adjustment system, method and vehicle on an AMT vehicle. Background technique [0002] AMT is the abbreviation of automatic mechanical transmission, which is the mainstream transmission technology in the field of commercial vehicles in the world. It can automatically calculate and change into the appropriate gear according to information such as vehicle speed, vehicle weight, engine horsepower and accelerator pedal, thus greatly reducing the driver's work intensity. [0003] The external characteristic curve of the engine illustrates the capability of the engine and is a very important input signal in AMT calculation. Under the same circumstances, the more accurate the external characteristic curve of the engine is, the more reasonable the gear calculated by AMT will be. However, during its life cycle, with the continuous use of users, th...

AI Technical Summary

Problems solved by technology

However, during its life cycle, with the continuous use of users, the engine is constantly worn out, and its actual capacity is also constantly declining.

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