Two-stroke internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 21, 2009
Grant Date -
May 1, 2008
app pub date -
Oct 26, 2007
filing date -
Oct 27, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A cylinder bore (4) of a two-stroke internal combustion engine (1) has first scavenging ports (12) and second scavenging ports (13) inside. The first scavenging ports (12) are nearer to an exhaust port (11) of the engine (1) than the second scavenging ports (13). In each scavenging stroke, the second scavenging ports (13) are opened earlier than the first scavenging ports (12) and introduce fuel-free air (A) from the second scavenging ports (13) into a combustion chamber (6). The first scavenging ports (12) are opened later and introduce an air-fuel mixture (M) pre-compressed in a crank chamber (8) into the same combustion chamber (6). Thus, harmful substances contained in exhaust gas discharged from the engine (1) are reduced.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2007 Application Filing Year
- F02B Class
- 865 Applications Filed
- 446 Patents Issued To-Date
- 51.57 % Issued To-Date
