The invention provides a method and a system for engine idle speed control. Methods and systems are provided for improving fuel economy by opportunistically lowering engine idle speed below a base idle speed when electrical loads are not present. A hydraulic brake pressure is increased when the idle speed is raised, in anticipation of vehicle propulsion. The brake pressure counteracts any creep torque and unintended vehicle acceleration resulting from the rising engine idle speed.

    本公开提供了“用于发动机怠速控制的方法和系统”。提供了用于通过在不存在电负载时将发动机怠速转速机会性地降低到低于基本怠速转速来改善燃料经济性的方法和系统。在预期到车辆推进的情况下,当所述怠速转速提高时,液压制动压力会增加。所述制动压力可以抵消任何由于所述发动机怠速转速的上升而引起的蠕行扭矩和非预期的车辆加速度。


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    Title :

    Method and system for engine idle speed control


    Additional title:

    用于发动机怠速控制的方法和系统


    Contributors:

    Publication date :

    2020-06-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    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



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