Vehicle drivetrain comprising engine, brakes and transmission, and associated control method

摘要

A braking signal produced by the driver operating a brake pedal (21) is converted into a desired braking moment and a motor traction moment set value is determined according to the braking moment. The gear ratio of an automatic transmission (4) is automatically set according to the engine traction moment set value, using a gear change characteristic. The characteristic curves are set taking account of the minimum engine moment.