Method for controlling a vehicle propulsion unit comprising a continuously variable transmission

摘要

The method involves generating control signals in the form of command and state signals for the drive engine (1) and transmission (2), whereby a desired gradient for the gear ratio is defined. The desired acceleration or driven revolution rate gradient is computed from the drive lever setting and instantaneous vehicle speed using a characteristic field. A desired gear setting is derived from the desired acceleration and current engine speed. A limited desired gear setting is derived from the desired gear setting so that the engine speed does not fall below a value that is a function of the position of the engine power setting element. The transmission is adjusted accordingly and the drive parameter for the power control element is derived directly from the drive lever setting.