ELECTRONIC CONTROL DEVICE AND METHOD FOR DETERMINING WHETHER ELECTRONIC CONTROL DEVICE IS ABNORMAL OR NORMAL

WIPO Patent Application WO/2018/155084

A1

The present invention achieves a compact electronic control device which does not require complex circuity and which has an abnormality detection circuit by which a cost increase can be minimized when applied not only to a direct-injection injector drive circuit but also to other types of drive circuits. A current detection unit 9 is provided with a current detection resistor 91, a differential amplifier 92, and a current detection part 93. A current detected by the current detection part 93 is supplied to an abnormality/normality determination part 17. The combined resistance value of a diagnostic current drive circuit 7 and the current detection resistor 91 is higher than the resistance value of an injector drive circuit 3. A fuel injection signal 4 is input to an input end of a logic circuit 6, and a fuel cut signal is input to a negative input end of the logic circuit 6. An output end of the logic circuit 6 is connected to the gate of the injector drive circuit 3. An output signal 4 from a fuel injection signal output part 14 is supplied to the gate of the diagnostic current drive circuit 7 via a switch 8.

WO/2014/072099	VALVE FOR METERING FLUID
JP6414022	Fuel injection controller and fuel injection system
JPS61261653	FUEL SUPPLY DEVICE

SUGIYAMA YASUSHI (JP)
ARATA ATSUSHI (JP)
SHIMA YASUO (JP)
DOI MASAHIRO (JP)

PCT/JP2018/002636

August 30, 2018

January 29, 2018

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HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

F02M51/00; B60R16/02; F02D41/20; F02D41/22

JP2016108984A	2016-06-20
JP2013024080A	2013-02-04
JP2003113732A	2003-04-18
JP2002324710A	2002-11-08

TODA Yuji (JP)

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