DUAL-FUEL ENGINE HAVING EXTENDED VALVE OPENING

摘要

A method of operating a dual-fuel engine having a combustion chamber and at least one valve associated with the combustion chamber is disclosed. The method may include moving the at least one valve from a flow blocking position to a flow passing position during a power stroke of the dual-fuel engine, and injecting gaseous fuel into the combustion chamber. The method may also include selectively holding the at least one valve between the flow blocking position and the flow passing position during at least a portion of a compression stroke of the dual-fuel engine after an end of injection of the gaseous fuel, and releasing the at least one valve and allowing the at least one valve to move to the flow blocking position during the compression stroke. The method may further include injecting liquid fuel into the combustion chamber to ignite the gaseous fuel.

主权项

1. A method of operating a dual-fuel engine having a combustion chamber and at least one valve associated with the combustion chamber, the method comprising:
moving the at least one valve from a flow blocking position to a flow passing position during a power stroke of the engine; injecting gaseous fuel into the combustion chamber; selectively holding the at least one valve between the flow blocking position and the flow passing position during at least a portion of a compression stroke of the engine after an end of injection of the gaseous fuel; releasing the at least one valve and allowing the at least one valve to move to the flow blocking position during the compression stroke; and injecting liquid fuel into the combustion chamber to ignite the gaseous fuel after the at least one valve is at the flow blocking position during the compression stroke.