SYSTEMS AND METHODS FOR INJECTING GASEOUS FUEL DURING AN EXHAUST STROKE TO REDUCE TURBO LAG

摘要

Methods and systems are provided for injecting and combusting an amount of gaseous fuel during an exhaust stroke of a cylinder combustion event in order to reduce turbo lag and reduce a duration of time required for an exhaust catalyst to light-off during transient events. In one example, when an increase in torque demand is greater than a threshold, a first amount of gaseous fuel may be combusted during a compression stroke of a cylinder combustion event and a second amount of gaseous fuel may be combusted during an exhaust stroke of the combustion event. The second amount may be adjusted based on the increase in torque demand.

主权项

1. An engine method, comprising:
during an increase in torque demand greater than a threshold, spark igniting a first amount of gaseous fuel during a compression stroke of a cylinder combustion event; and spark igniting a second amount of the gaseous fuel during an exhaust stroke of the cylinder combustion event.