公开(公告)号：US3903855A

公开(公告)日：1975-09-09

申请号：US40158873

申请日：1973-09-28

Applicant: GEN MOTORS CORP

Inventor： KLAKULAK THOMAS J ,  KLOMP EDWARD D

IPC: F01L1/28 ,  F01L9/02

CPC classification number: F01L1/28 ,  F01L9/02

Abstract: An intake valve structure for use in an internal combustion engine wherein a conventional intake poppet valve operable in the normal manner slidably carries an auxiliary intake valve in the form of a tubular poppet valve which is normally spring-biased into closed position upstream of the intake poppet valve but which can be opened by differential pressure existing between the intake manifold and the cylinder with which this intake valve structure cooperates during the time interval when the intake poppet valve is open.