| 摘要 |
<p>A fuel injection device for an internal combustion engine which injects fuel into an engine incorporating a plurality of cylinders using a single fuel injector. When fuel is injected from a single fuel injector into a plurality of cylinders synchronously with respective air intake strokes of the cylinders, a problem is encountered wherein the injected fuel is not uniformly distributed within the respective cylinders over the entire engine operating range due to delays resulting from feeding of fuel and operation of solenoid valves. For a four-cylinder engine in which air intake strokes are repeated in the sequence of first, third, fourth and second cylinders, a single fuel injector (202) is responsive to a control signal from a controller (500) to start injecting fuel once per respective cylinder when the first and fourth cylinders are at an intake stroke. The time at which fuel injection starts and the duration of the injection are calculated in response to signals indicative of the operating conditions of the engine, which signals are obtained from a hot wire sensor (116), a crank angle detector (314), a temperature sensor (316), and oxygen sensor (406), etc. via the CPU (502) and ROM (504) of the controller (500), and applied through an interface circuit (508) to the injector (202). The cylinder to be injected with the fuel from the injector (202) is altered from the first and fourth to second and third cylinders by a signal delivered by the CPU (502) in response to a signal from the oxygen sensor (406). </p> |
