Fuel control apparatus for internal combustion engine
An apparatus for use with an internal combustion engine is described including a throttle valve situated in an induction passage connected through an intake manifold to cylinders, comprising: means for controlling the amount of fuel supplied to the engine at a position upstream of the intake manifold; sensor means sensitive to a condition of the engine for producing a sensor signal indicative of the engine condition; a control circuit responsive to the sensor signal for determining a value corresponding to a setting of the means for controlling the amount of fuel to the engine. The control circuit includes means for determining a first value corresponding to the amount o fuel supplied to the engine based upon engine load and speed, means responsive to a demand for engine acceleration for determining a second value corresponding to the amount of supplemental fuel supplied to the engine, means for measuring a first time period during which the throttle valve remains at angles greater than a predetermined value, means for measuring a second time period after the throttle valve closes to the predetermined angle until a demand for engine acceleration occurs again, means for decreasing the second value when the first time period (T1) is greater than a predetermined value (T1) and the second time period is less than a predetermined value, and means for summing the first and second values to calculate the value corresponding to a setting of the means for controlling the amount of fuel to the engine; and means for converting the calculated value into a setting of the means for controlling the amount of fuel to the engine.
- Assignee:
- Nissan Motor Co., Limited
- Patent Number(s):
- US 4706632
- OSTI ID:
- 5850627
- Resource Relation:
- Patent File Date: Filed date 27 Oct 1986
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fuel/air mixture supply system with additional air supply
Air-fuel ratio control apparatus for internal combustion engines