Engine speed controller for a vehicle

摘要

A vehicular engine speed controller for keeping the engine speed constant while preventing the overrunning of the engine. The vehicle includes a propeller shaft connected to driving wheels and a torsional damper for connecting the propeller shaft with the engine drive shaft. The controller comprises a detector for detecting a value corresponding to engine speed, and an injection control device for controlling injectors, based on the detected value from the detector. The control device stores a first and second determining values (Da and Db). The control device halts fuel supply from the injector when the detected value exceeds the first value (Da), and resumes fuel supply when the detected value becomes below the second value (Db). The control device further causes the injector to execute the resumption and halt of fuel injection at least one time, when the detected value is changed to a smaller value than the first value (Da) from a larger value than the first value (Da), thereby extinguishing the torsional energy accumulated in the torsional member. The engine speed is not affected by the torsional damper.