Patent ID: 9636973
Date: 2017-05-02
CPC Classifications: B60H,F01N,F01P,F02D,F02M,F02N,F02P,Y02T

Claim:
1. A method for heating a vehicle cabin comprising: closing an exhaust throttle while diverting at least a portion of throttled exhaust gas through an exhaust gas recirculation (EGR) cooler coupled upstream of the throttle, the throttle coupled downstream of an exhaust catalyst; transferring heat from the EGR cooler to a heater core to provide heat to the vehicle cabin; while a temperature of the exhaust catalyst is below a threshold temperature and while the exhaust throttle is closed, retarding spark ignition timing; and while diverting exhaust gas through the EGR cooler, generating vacuum by flowing gas through an ejector.