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EXHAUST THROTTLING FOR CABIN HEATING

  • US 20160339764A1
  • Filed: 08/02/2016
  • Published: 11/24/2016
  • Est. Priority Date: 11/05/2013
  • Status: Active Grant
First Claim
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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.

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