Abstract: An apparatus for controlling the feed of the oil discharged from an oil pump in an internal combustion engine having an oil pump which feeds lubricating oil to the engine by an oil delivery pipe and which feeds working oil to a hydraulic actuator for controlling valve timings of the engine by a branch pipe connected to the oil delivery pipe, comprising valve means in said oil delivery pipe downstream of the connection between the oil delivery pipe and the branch pipe, which opens in accordance with the delivery pressure of the discharged oil to control the amount of the lubricating oil flowing therethrough.

Abstract: An internal combustion engine comprising a main combustion chamber and a subsidiary combustion chamber having a spark plug. The subsidiary combustion chamber comprising a restricted opening, a first chamber and a second chamber, said chambers being interconnected by the restricted opening. The first chamber has at least two connecting passages communicating the main combustion chamber and the first chamber. One of the connecting passages is directed to the intake valve. The spark gap of the spark plug is located in the first chamber.