Back to results
US 4,391,243 AGranted
Method and apparatus of supplying fuel in electronic control fuel injection engine
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorHironori Bessho
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorHironori Bessho
Estimating the term…
Fuel is cut off in the deceleration of a vehicle to improve efficiency of fuel consumption. Rotational speed of an engine in the resumption of fuel supply in the completion of the fuel cut-off is set to a value smaller than that otherwise set when a brake device is operated or the vehicle speed is higher than a predetermined value. While the torque of the engine varies abruptly to produce impact when the fuel cut-off is completed, passengers have a slight feeling of impact while the vehicle is being braked and travelling with high speed. Thus, while the feeling of impact is reduced, a period of fuel cut-off is increased to improve further the efficiency of fuel consumption and others.
A fuel supply method for an electronic control fuel injection engine in which a fuel injection valve is operated by electric signals to control an amount of fuel supply from the fuel injection valve to an intake system, characterized in that, when a brake device is operated or vehicle speed is higher than a predetermined value, the rotational speed of the engine with the fuel cut-off being completed in the deceleration of the vehicle and the fuel supply being resumed is set to a value smaller than that otherwise set.
An apparatus for supplying fuel to an electronic control fuel injection engine in which a fuel injection valve is operated by electric signals to control an amount of fuel supply from the fuel injection valve to an intake system, characterized in that said apparatus comprises a first detecting means for detecting the operation of a brake device, a second detecting means for detecting vehicle speed, a comparator means for comparing the rotational speed of the engine with a reference value to allow the fuel injection valve to be operated when the rotational speed of the engine is lower than the reference value and a control means for receiving detecting signals from the first and second detecting means to set thereby the reference value of the comparator means lower than that set otherwise when the brake device is operated or the vehicle speed is higher than a predetermined value.
Dependencies are inferred from the claim text.