| 摘要 |
PURPOSE:In an operation range where the engine load is small, a hydraulic circuit is automatically set into the hydraulic circuit in neutral state, and the engine is operated by using a portion of cylinders. CONSTITUTION:The apparatus is equipped with a vehicle-speed switch 18 for detecting the stop of a car, an accelerator switch 19 for detecting non-operation of an accelerator pedal, a selecting lever switch 22 for detecting the position of a selecting lever, and an automatic transmission. Said automatic transmission is equipped with a selector valve 31 in a hydraulic circuit for feeding oil pressure to the frictional element of a gear train in a travelling range. When the vehicle-speed switch 18 and the accelerator switch 19 operate, and the selecting lever switch 22 detects a travelling range, said selector valve 31 operates to drain the oil pressure in said hydraulic circuit and cut fuel feeding to a portion of cylinders. The constitution described above allows the fuel to a portion of cylinders to be cut in low load operation range, and the operation by a portion of cylinders is performed. |
