Automatic engine stop-start system

摘要

An automatic engine stop-start system is applied to a vehicle engine (1) that is equipped with an automatic transmission (7). The automatic transmission (7) has a mechanical pump (9) driven by an engine (1), and an electromagnetic valve (23) for opening and closing a fluid path (21). The automatic transmission (7) further has a motor pump (17) for supplying pressurized fluid when the engine is automatically stopped, and a check valve 19 for preventing back flow to the motor pump 17. A controller (3) controls the valve (23) and the motor pump (17) so as to cut the fluid path (21) before the controller (3) automatically stops the engine (1).