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    • 3. 发明授权
    • Electronically controlled fuel injection system
    • US3991726A
    • 1976-11-16
    • US542001
    • 1975-01-17
    • Mitsuo KawaiShigehiko Ito
    • Mitsuo KawaiShigehiko Ito
    • F02D41/34F02B1/04F02D41/06F02B3/00
    • F02D41/068F02B1/04
    • There is provided an electronically controlled fuel injection system comprising a temperature fuel enrichment circuit for generating, in accordance with the output signal of an internal combustion engine temperature sensor, an output signal corresponding to a temperature fuel enrichment characteristic to provide the required fuel enrichment for cold operation, and fuel injection means for injecting an increased quantity of fuel in accordance with the output signal of the temperature fuel enrichment circuit. The system is additionally provided with a revolution compensation circuit for generating a revolution signal corresponding to the number of engine revolutions per minute for continuously decreasing the temperature fuel enrichment characteristic of the temperature fuel enrichment circuit in accordance with increase in the number of engine revolutions per minute. In this way, an improved fuel consumption characteristic is ensured during the warmup period and the underfeeding of fuel under the idling operation is eliminated, and moreover the fuel enrichment is smoothly accomplished to suit changes in the driving conditions of the vehicle.