Patent ID: 9714624
Date: 2017-07-25
CPC Classifications: F02B,F02D,Y02T

Claim:
1. An engine system, comprising: an engine including at least one cylinder having a side wall; a nozzle disposed on the side wall and configured to selectively inject a gaseous fuel into the at least one cylinder of the engine; an intake port defined by the side wall and configured to direct air for combustion into the at least one cylinder; a first exhaust valve and a second exhaust valve associated with the at least one cylinder and configured to direct exhaust from the at least one cylinder to an atmosphere surrounding the engine, the second exhaust valve being located closer to the nozzle than the first exhaust valve; and a controller operatively coupled to the first exhaust valve and the second exhaust valve, the controller being configured to close the first exhaust valve at a first timing and close the second exhaust valve at a second timing, the second timing occurring after the first timing during one cycle of the at least one cylinder.