Patent ID: 7657365
Filing Date: 2010-02-02
Classification: F02B,F02D

Abstract:
1. A fuel injection quantity control system for a general-purpose engine having a control unit controlling an amount of fuel injected by a fuel injection valve into an intake passage, in accordance with an operation of throttle operating means that sets an opening degree of a throttle valve by manual operation, the control unit correcting the amount of fuel injected by the fuel injection valve toward an increased side when an acceleration state resulting from operation of the throttle operating means occurs, the control unit comprising: detection means for detecting an index representing the opening degree of the throttle valve; acceleration state determining means for making a determination on the acceleration state based on a change in a value detected by the detection means; and acceleration correction means for correcting the amount of fuel injected by the fuel injection valve toward the increased side, when the acceleration state determining means determines that the acceleration state is present, wherein when an increase in the value detected by the detection means is a predetermined value or more within a first predetermined time period, the acceleration state determining means determines that the acceleration state is present, and then inputs a signal inducing fuel-amount-increase correction to the acceleration correction means, and when the state where an amount of change in the value detected by the detection means reaches a predetermined value or more in either of increasing or decreasing direction within a first predetermined time period continuously occurs a predetermined number of times or more before a second predetermined time period expires on each state, the determination of the acceleration state is stopped until a third predetermined time period passes.