Patent Number: 7,100,550

Title: Two-stroke engine transfer ports

Abstract: A two-stroke internal combustion engine including a cylinder; and a piston movably mounted in the cylinder. The cylinder includes an exhaust port and transfer ports. The transfer ports include a first pair of the transfer ports disposed closer to the exhaust port than a second pair of the transfer ports which are disposed further away from the exhaust port. The first pair of transfer ports are angled relative to each other at a first angle of about 70.degree. to about 85.degree. and the second pair of transfer ports are angled relative to each other at a second angle of about 120.degree. to about 150.degree.. Directional discharge of scavenged air out of the transfer ports 10 establishes a flow path for the scavenged air to minimize losses of the fresh unburned fuel into the exhaust port.

Inventors: Sheldon; John D. (Anderson, SC), Navinahally; Nagesh S. (Anderson, SC)

Assignee: Homelite Technologies, Ltd.

International Classification: F02B 75/02 (20060101)

Expiration Date: 9/05/02018