The invention relates to deceleration cylinder shut-off in a hybrid vehicle. Methods and arrangements for transitioning an engine between a deceleration cylinder shut-off (DCCO) state and an operating state are described. In one aspect, transitions from DCCO begin with reactivating cylinders to pump air to reduce pressure in the intake manifold prior to firing any cylinders. In another aspect, transitions from DCCO involve the use of an air pumping jump fire mode of operation. After the manifold pressure has been reduced, the engine may transition to a cylinder deactivation jump fire mode of operation or other suitable mode of operation. In yet another aspect, a method of transitioning to DCCO using a skip fire method is described. In this aspect, the fraction of the duty cycle that is ignited is gradually reduced to a threshold ignition fraction. Then, after the threshold firing fraction is reached, all of the working chambers are deactivated.
本发明涉及一种混合动力车辆中减速气缸切断。描述了用于使发动机在减速气缸切断(DCCO)状态与操作状态之间过渡的方法和布置。在一方面,从DCCO的过渡开始于再启用气缸以泵送空气,从而在对任何气缸点火之前减小该进气歧管中的压力。在另一方面,从DCCO的过渡涉及空气泵送跳转点火操作模式的使用。在该歧管压力已经被减小之后,该发动机可以过渡到气缸停用跳转点火操作模式或其他适当的操作模式。在又另一方面,描述了一种使用跳转点火方法过渡到DCCO的方法。在这一方面,工作周期的被点火的分率逐渐降低至阈值点火分率。然后,在达到该阈值点火分率之后,停用所有这些工作室。
Deceleration cylinder shut-off in hybrid vehicle
混合动力车辆中减速气缸切断
2022-06-21
Patent
Electronic Resource
Chinese
IPC: | F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein / F02N STARTING OF COMBUSTION ENGINES , Anlassen von Brennkraftmaschinen |
Deceleration fuel shut off scheduling based on vehicle parameters
European Patent Office | 2015
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