Patent ID: 9181822
Filing Date: 2015-11-10
Classification: F01L,F02D,Y02T

Abstract:
1. A variably operated valve system for a multi-cylinder internal combustion engine, the internal combustion engine having a plurality of cylinders, comprising: a pair of intake valves and a pair of or a single exhaust valve disposed for each of the cylinders; a first valve stop mechanism configured to switch between a valve operation state in which one of the pair of intake valves from among the pair of intake valves of a part of the cylinders is operated to be open or closed and a valve stopped state in which a valve open-or-closure operation of the one of the pair of intake valves is stopped; and a second valve stop mechanism configured to switch between a valve operation state in which the other of the pair of intake valves from among the pair of intake valves of the part of the cylinders is operated to be open or closed and the valve stopped state in which the valve open-or-closure operation is stopped, wherein the first valve stop mechanism is configured to be in the valve operation state when a switching energy is supplied and to be in the valve stopped state when a supply of the switching energy is stopped and the second valve stop mechanism is configured to be in the valve stopped state when the switching energy is supplied and to be in the valve operation state when the supply of the switching energy is stopped, wherein, during a start of the engine, the supply of the switching energy to the first valve stop mechanism and the second valve stop mechanism is stopped.