Patent ID: 8055433
Filing Date: 2011-11-08
Classification: F02D

Abstract:
1. A fuel injection control device for continuously correcting an injection amount for an engine based on a sensed throttle opening, said fuel injection control device comprising: an electronic control unit operatively connected to a plurality of sensors in an internal combustion engine, said plurality of sensors including a throttle position sensor; a basic-injection-use map stored in a recordable data storage medium for deriving a basic injection amount corresponding to a sensed throttle opening; and an additional-injection-use map stored in a recordable data storage medium for deriving an additional injection amount corresponding to said sensed throttle opening; wherein said fuel injection control device is configured to divide each engine cycle into a predetermined number of stages; said predetermined number of stages comprising a first calculation stage for calculating the basic injection amount; and a second calculation stage provided after the first calculation stage; wherein said first and second calculation stages are set in each engine cycle; wherein said fuel injection control device is operated such that: a first injection amount is obtained by applying a throttle opening measured in the first calculation stage to the additional-injection-use map; a second injection amount is obtained by applying a throttle opening measured in the second calculation stage to the additional-injection-use map; said first injection amount and said second injection amount are compared with each other; and wherein when the second injection amount is greater than the first injection amount, an additional fuel injection with an amount independent from the basic injection amount is performed based on a calculated injection amount obtained by subtracting the first injection amount from the second injection amount; and when the first injection amount is greater than the second injection amount, the basic injection amount from the first calculation stage is corrected.