Patent ID: 6925987
Filing Date: 2005-08-09
Classification: F02D,G01L,Y02T

Abstract:
1. A control apparatus for a multi-cylinder in-cylinder injection type internal combustion engine which operates each fuel injector based on a fuel injection timing at each cylinder and makes a knock determination of each cylinder based on an output signal from a knock sensor during a knock determination period corresponding to each cylinder, the control apparatus comprising: a determining device that determines whether mechanical noise produced by operation of the fuel injector at a second cylinder rides on the output signal from the knock sensor during the knock determination period corresponding to a first cylinder based on the fuel injection timing at the second cylinder and the knock determination period corresponding to the first cylinder; and a setting device that sets the knock determination period corresponding to the first cylinder in accordance with a fuel injection timing at a second cylinder based on a determination result from the determining device so as to avoid a case in which the mechanical noise produced from operation of the fuel injector at the second cylinder rides on the output signal from the knock sensor during the knock determination period corresponding to the first cylinder.