Method and system for controlling an engine during tunneling operation

摘要

Various methods and systems are provided for an engine in a vehicle, the engine having an intake and an exhaust. In one example, a method includes determining the vehicle is under tunneling operation in response to one or more of an intake gas constituent and an exhaust gas constituent. The method further comprises adjusting one or more operating parameters in response to the determination of tunneling operation.

主权项

1. A method for controlling an engine in a vehicle via an electronic device, the engine having an intake and an exhaust, comprising:
determining if the vehicle is under tunneling operation in response to an intake gas constituent; if tunneling operation is not confirmed, adjusting an engine exhaust gas recirculation amount in response to exhaust nitrogen oxide concentration; and if tunneling operation is confirmed, adjusting the engine exhaust gas recirculation amount to zero percent.