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FOUR STROKE ENGINE, HANDHELD WORK APPARATUS HAVING A FOUR STROKE ENGINE, AND METHOD FOR OPERATING A FOUR STROKE ENGINE
FOUR STROKE ENGINE, HANDHELD WORK APPARATUS HAVING A FOUR STROKE ENGINE, AND METHOD FOR OPERATING A FOUR STROKE ENGINE
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机译:四冲程发动机,具有四冲程发动机的手持式工作装置以及用于操作四冲程发动机的方法
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摘要
A mixture-lubricated four stroke engine has a cylinder in which a combustion chamber is formed. The combustion chamber is delimited by a piston which is mounted movably in the cylinder. The engine has an intake channel which discharges into the combustion chamber via an inlet opening controlled by an inlet valve. A mixture formation unit includes at least one fuel opening which discharges into the intake channel. For the lubrication of the crankcase interior, a flow connection connects the intake channel to the crankcase interior via a connecting opening which discharges into the intake channel downstream of the mixture formation unit. The fuel quantity is controlled by a fuel valve. A control unit is configured to activate the fuel valve in a manner dependent on the position of the crankshaft such that the fuel valve is opened at least also during a part of the compression stroke.
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