FUEL INJECTION ADVANCE ANGLE MEASURING DEVICE OF DIESEL ENGINE

摘要

PURPOSE:To perform correct injection control by determining a correction signal correcting the output deley due to a filtering means removing noises from a needle valve lift signal sent from a lift sensor responding to the action of a fuel injection valve and correcting an injection advance angle value with this signal. CONSTITUTION:A lift sensor 11 generating a needle valve lift signal in response to the lift action of the needle valve of a fuel injection valve and a reference angle detecting means 12 generating a reference angle signal every time the crank shaft of an engine reaches a predetermined reference angle position are provided. After a noise component is removed by a filtering means, the needle valve lift signal of the lift sensor 11 is fed to a delay correcting means 14 and an advance angle value calculating means 15 together with the reference angle signal. A correction signal correcting the output delay of the needle valve lift signal is generated by the delay correcting means 14, and an injection advance angle value is calculated by the advance angle calculating means 15 based on the correcting signal, needle valve lift signal, and reference angle signal.