Patent ID: 7658170
Filing Date: 2010-02-09
Classification: F02B,F02D

Abstract:
1. A stratified scavenging two-cycle engine comprising: a cylinder defining a cylinder air passage and a scavenging passage; an air cleaner for providing pure air; an air passage system that delivers pure air from the air cleaner to the scavenging passage through an air passage; a carburetor comprising an air valve that regulates the air passage and that is closable to thereby close the air passage; and an auxiliary air passage system that delivers pure air from the air cleaner to the scavenging passage through an auxiliary air passage while the air valve is completely closed or minimally open for idling; wherein the auxiliary air passage system includes a pipe that is attached to connect the air cleaner and the cylinder to extend along an outside of the carburetor, and the pipe directly intercommunicates a downstream side of the air cleaner and the cylinder air passage.