Systems and methods for controlling ignition energy during exhaust stroke combustion of gaseous fuel to reduce turbo lag

摘要

Methods and systems are provided for adjusting ignition energy of the spark required for combustion of gaseous fuel injected during an exhaust stroke of a cylinder combustion event to reduce turbo lag. In one example, a method includes combusting a first amount of gaseous fuel during a compression stroke of a cylinder combustion event using a first ignition energy and combusting a second amount of gaseous fuel during an exhaust stroke of the cylinder combustion event using a second ignition energy, the second ignition energy lower than the first ignition energy. The second ignition energy may be adjusted based on in-cylinder pressure and cylinder load.

主权项

1. A system for an engine, comprising:
an engine cylinder; a fuel injector coupled to the engine cylinder; a spark plug coupled to the engine cylinder, the spark plug including an ignition coil; and a controller with computer-readable instructions for injecting liquefied petroleum gas (LPG) into the engine cylinder with the fuel injector during an exhaust stroke of a cylinder combustion event and igniting the injected LPG by striking the ignition coil one or more times to deliver a spark to the engine cylinder during the exhaust stroke.