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    • 10. 发明授权
    • Procedure and control unit to diagnose a secondary air system
    • 诊断二次空气系统的程序和控制单元
    • US07562565B2
    • 2009-07-21
    • US11800259
    • 2007-05-04
    • Detlef HeinrichDierk RommelMartin SchaefflerAndreas Beer
    • Detlef HeinrichDierk RommelMartin SchaefflerAndreas Beer
    • G01M15/04
    • F01N3/32F01N3/22F01N11/00F01N2550/14Y02T10/20Y02T10/47
    • A procedure is introduced to test the functional capability of a secondary air system of an internal combustion engine, wherein values of a pressure are acquired, which arises in the secondary air system between the secondary air pump and a secondary air flow cross section, which can be controlled, when the secondary air pump is activated and the actuation of the secondary air flow cross section is increased; in that a measurement for the pressure is developed from the acquired values and is compared with a set point value, and the functional capability of the secondary air system is assessed as a function of a result of the comparison. The procedure characterizes itself in such a way, that in a secondary air system, whose secondary air flow cross section is controlled by two secondary air valves, wherein one of the two secondary air valves is actuated to close, while the other one of the two secondary air valves is actuated to open, and the assessment of the functional capability for a section of the secondary air system occurs in the section, in which the secondary air valve actuated to open is disposed. In addition a control unit is introduced, which controls the sequence of such a procedure.
    • 引入了一种程序来测试内燃机的二次空气系统的功能能力,其中获得了在二次空气泵和二次空气流横截面之间的二次空气系统中产生的压力值,其可以 当二次空气泵被激活并且二次空气流动横截面的致动增加时被控制; 因为从所获取的值中产生压力的测量值并与设定值进行比较,并且根据比较结果来评估二次空气系统的功能能力。 该程序以这样的方式表征:在二次空气系统中,其二次空气流横截面由两个二次空气阀控制,其中两个二次空气阀中的一个被致动以关闭,而另一个 辅助空气阀被致动以打开,并且对于二次空气系统的一部分的功能能力的评估发生在其中设置致动打开的二次空气阀的部分中。 另外还引入了一个控制单元,用于控制这种程序的顺序。