Automatic engine stop and start system

摘要

An automatic engine stop and start system is disclosed which comprises a break system having a break booster for assisting a breaking operation of a driver by using a negative pressure generated by an engine or an apparatus driven by the engine. Furthermore, the automatic engine stop and start system comprises a controller for instructing automatic stopping or automatic starting of the engine under establishment of a predetermined condition of the engine based on an input signal. Also a downward road detecting means is provided for detecting that a vehicle runs on a downward road, wherein the controller prohibits the engine from being stopped in running on the downward road.