Engine system and gas fuel combustion method
AssigneeYanmar Holdings Co., Ltd.
InventorsYusuke Honda, Kazuteru Toshinaga
Life of this patent
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Abstract
The present disclosure describes an engine system that can achieve at least one of the followings: suppressing of generating of nitrogen oxides and suppressing of remaining of uncombusted hydrocarbons. The engine system has a combustion chamber to which air and a gas fuel are supplied, and is configured to combust the gas fuel. The engine system includes a liquid fuel injecting unit, and a control unit. The liquid fuel injecting unit is configured to inject a liquid fuel thereby to ignite the gas fuel. The control unit is configured to control the liquid fuel injecting unit. The control unit is configured to control the liquid fuel injecting unit so that injection of the liquid fuel is performed after a flame propagation after ignition of the gas fuel is ended.
Claims20
An engine system that has a combustion chamber to which air and a gas fuel are supplied, and the engine system being configured to combust the gas fuel, the engine system comprising:
- a liquid fuel injecting unit configured to inject a liquid fuel into the combustion chamber;
- and
- a control unit configured to control the liquid fuel injecting unit, and
- wherein the control unit is configured to control the liquid fuel injecting unit to perform:
- a first injection of the liquid fuel in association with ignition of the gas fuel, and
- a second injection of the liquid fuel after a crank angle is equal to ten degrees.
A gas fuel combustion method in an engine in which air and a gas fuel are supplied to a combustion chamber, the gas fuel combustion method comprising:
- injecting a liquid fuel into the combustion chamber to enable ignition of the gas fuel;
- and
- performing an injection of the liquid fuel after a crank angle is equal to ten degrees based on ignition of the gas fuel.
An engine system comprising:
- a liquid fuel injection unit configured to inject a liquid fuel into a combustion chamber;
- and
- a control unit configured to, during a single combustion cycle:
- control the introduction of supply air and a gas fuel to the combustion chamber;
- control the liquid fuel injection unit to perform a first injection of the liquid fuel;
- and
- control the liquid fuel injection unit to perform, subsequent to the first injection, a second injection of the liquid fuel at a crank angle of greater than or equal to 10 degrees.
Dependencies are inferred from the claim text.