US 2012/0072093 A1 · Apparatus and Method for Controlling Fuel Injection of Internal Combustion Engine

Abstract

The present invention relates to a fuel injection control apparatus for controlling fuel injection and a method therefor in an engine having first and second intake passages provided with first and second fuel injection valves, respectively. Fuel injection modes using the two injection valves include an alternative injection mode in which the first and second fuel injection valves are alternately operated every predetermined number of cycles and a combined injection mode in which both the first and second fuel injection valves are used for each cycle. Then, the combined injection mode is selected in a full load range. In a partial load range, the alternative injection mode is selected in a cold state and the combined injection mode is selected after warm-up. Accordingly, it is possible to reduce an equilibrium amount of adhering fuel to an inner wall of an intake passage.

Claims20

Dependent claims

A fuel injection control apparatus for controlling fuel injection with a first fuel injection valve and a second fuel injection valve in an internal combustion engine including a first intake passage provided with the first fuel injection valve, and a second intake passage provided with the second fuel injection valve, for each cylinder, comprising:

a first unit which controls fuel injection with the first fuel injection valve and the second fuel injection valve in accordance with an alternative injection mode in which the first fuel injection valve and the second fuel injection valve are alternately switched every predetermined number of cycles as a fuel injection valve to be used for fuel injection.

A fuel injection control method for controlling fuel injection with a first fuel injection valve and a second fuel injection valve in an internal combustion engine including a first intake passage provided with the first fuel injection valve, and a second intake passage provided with the second fuel injection valve, for each cylinder, comprising the steps of:

detecting an operating condition of the internal combustion engine;
selecting a fuel injection mode from either an alternative injection mode in which the first fuel injection valve and the second fuel injection valve are alternately switched every predetermined number of cycles, as a fuel injection valve to be used for fuel injection or a combined injection mode in which fuel is injected to the internal combustion engine by using both the first fuel injection valve and the second fuel injection valve for each cycle, in accordance with the operating condition of the internal combustion engine;
and
controlling fuel injection with the first fuel injection valve and the second fuel injection valve in accordance with the selected fuel injection mode.

1 more element

Dependencies are inferred from the claim text.

Apparatus and Method for Controlling Fuel Injection of Internal Combustion Engine

Life of this patent

Apparatus and Method for Controlling Fuel Injection of Internal Combustion Engine

Life of this patent

Abstract

Claims20