Two-cycle engine

Details Two-cycle engine Two-cycle engine

2001-03-20

2003-07-15

Yuen, Henry C. (Department: 3747)

Internal-combustion engines

Two-cycle

Rear compression

C123S0730AE, C123S0730CA

Reexamination Certificate

active

06591793

ABSTRACT:

TECHNICAL FIELD
This invention concerns 2-cycle engines that are fitted to brush cutters, backpack power sprayers, etc., and in particular concerns 2-cycle engines which realize a reduction in total hydrocarbons (THC).
BACKGROUND OF THE INVENTION
With 2-cycle engines fitted to brush cutters or backpack power sprayers, etc., an air-fuel mixture in the crankcase is introduced into the combustion chamber through transfer ports when there is scavenging, and while the combustion chamber is scavenged the combustion chamber is filled.
With conventional 2-cycle engines, air-fuel mixture introduced into the combustion chamber through transfer ports is not left in the combustion chamber, but rather, the mixture is purged out through the outlet port and released into the atmosphere as un-burnt gas, making it a cause of air pollution.
SUMMARY OF THE INVENTION
The purpose of this invention is to provide the 2-cycle engine that can effectively reduce the amount of air-fuel mixture purged out through the outlet port.


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