Patent ID: 8014932
Filing Date: 2011-09-06
Classification: F02D,F02M,Y02T

Abstract:
1. A fuel injection controller for an internal combustion engine that is applied to an accumulator type fuel injection system including an accumulation container for accumulating and holding high-pressure fuel, a fuel pump for pressure-feeding a fuel to the accumulation container, and fuel injectors for injecting the high-pressure fuel accumulated in the accumulation container, the fuel injection controller comprising: first pressure detecting means that sequentially detects a first fuel pressure varied when the fuel injector injects the fuel; second pressure detecting means that sequentially detects a second fuel pressure varied when the fuel pump pressure-feeds the fuel; injection pressure computing means that corrects the first fuel pressure based on the second fuel pressure that is detected concurrently with the first fuel pressure when the fuel injector injects the fuel, thereby computing an injection pressure; and injection characteristic computing means that computes an injection characteristic by the fuel injector on the basis of the injection pressure computed by the injection pressure computing means, wherein the first pressure detecting means detects the first fuel pressure downstream of a fuel outlet of the accumulation container in a fuel passage from the accumulation container to an injection port of the fuel injector, and the second pressure detecting means detects the second fuel pressure downstream of the fuel outlet of the accumulation container in a fuel passage from the accumulation container to an injection port of another fuel injector.