Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1985-10-25
1986-09-23
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
73116, F02M 5100
Patent
active
046128948
ABSTRACT:
An engine control system has a heater and a temperature measuring element with a temperature-resistance characteristic. The heater and element are provided in the intake pipe of an engine. Heating, which initiated by a start pulse signal generated by an engine control unit in synchronism with engine rotation is supplied to the heater through a transistor. When the heater temperature has reached a reference temperature preset in accordance with the intake air temperature measured by the element, a comparator generates an output to deenergize the heater. The period of supplying the heating power is represented by a pulse signal from a flip-flop. This pulse signal is supplied as an airflow measurement signal to the engine control unit. The engine control unit calculates the basic fuel injection quantity and determines if the starting of the pulse signal received by the control unit falls within a predetermined period from the starting of the start pulse signal. If the starting has fallen outside the predetermined period, the output signal is considered to have been generated in response to a noise signal. In this case, a normal output signal next to the output signal generated in response to the noise signal is corrected.
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Akiyoma Susumu
Ina Katsuhiro
Ito Katsunori
Kinugawa Masumi
Satoh Yoshihisa
Nelli Raymond A.
Nippondenso Co. Ltd.
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