selbsttaetig schaltendes gearbox with a variable umschaltpunkt

摘要

An automatic transmission system in which the factor related to the load on the engine such as the degree of depression of the accelerator pedal, the negative pressure in the air intake pipe or the slippage of the torque converter and the factor related to the revolution of the engine such as the velocity of air flow into the engine or the number of revolutions of the input shaft of the transmission are the main factors for determining the speed changing point, and speed changing instructions are issued by an electrical control device including a logical operation circuit and transistor relay circuit. In the system, the settings such as the slip ratio of the torque converter, the vehicle speed and the number of revolutions of the engine for determining the speed changing point are changed over by switch means which is manipulated as is desired.