Methods and systems are provided for improving combustion events during cold-starts of a vehicle engine, where the cold-start events include start/stop events. In one example, a method comprises spinning the engine in a reverse direction in response to an engine pull-down event where a temperature of an intake manifold of the engine is below a threshold, to heat the intake manifold by drawing exhaust system heat to the intake manifold. In this way, combustion may be improved in response to requests to start the engine, which may reduce undesired emissions and which may improve fuel economy.
Systems and methods for heating a vehicle intake manifold during stop/start events
2018-12-04
Patent
Electronic Resource
English
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / F02N STARTING OF COMBUSTION ENGINES , Anlassen von Brennkraftmaschinen |
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