| 摘要 |
PURPOSE:To perform accurate control, by changing the frequency division ratio for an air flow sensor for drive pulses to injectors, depending on the output from the air flow sensor and the degree of opening of a throttle, to secure a period of non-driving of the injectors. CONSTITUTION:The outputs from an intake temperature sensor 9, a throttle sensor 10 and a water temperature sensor 11 are entered into the central processing unit 16 of a controller 12 through an A/D converter 14. The output from an air flow sensor 8 is entered into the central processing unit 16 through a counter 15 and entered into a frequency divider 19. A signal from the frequency divider 19 is supplied to injectors 6, 7 through a drive circuit 20 to control the air-fuel ratio. The frequency division ratio for the air flow sensor 8 is changed depending on the output from the air flow sensor and the degree of opening of a throttle, which is detected by a throttle sensor 10 and corresponds to the rotational frequency of an engine.
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