Violent running preventive device of engine idle
专利汇可以提供Violent running preventive device of engine idle专利检索，专利查询，专利分析的服务。并且PURPOSE:To prevent the violent running of an idle speed controller, by providing a means which forces an engine speed to be decreased when abnormalities of a program and an idle speed and a throttle valve in its openng not more than a fixed degree are simultaneously caused. CONSTITUTION:A watch dog timer circuit (WDT) 20 observing the action of a central processing unit (CPU) is connected to a terminal 12 of the CPU10 in a microcomputer, generating a low level output when the CPU is abnormal. This output is input to a reset terminal of the CPU10 through an inverter and a NOR gate 1, while further input to an NAND gate 3 through a inverter 2. Detection values of an engine speed detector circuit 40, outputting a high level for an engine speed not lower than a prescribed value, and a low limit switch LLSW, outputting a high level for a throttle valve opening not larger than a fixed degree, are further input to the NAND gate 3, and when an output S becomes a low level, a thinned-out ignition circuit 60 is operated.，下面是Violent running preventive device of engine idle专利的具体信息内容。
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