EGR CONTROLLER FOR DIESEL ENGINE

摘要

PURPOSE:To improve the accuracy of EGR control by performing the EGR control while compensating the rotation, cooling water temperature or lubricant oil temperature and absolute pressure in a suction pipe. CONSTITUTION:In order to achieve EGR corresponding to the rotary angle of a fuel measuring rotary shaft, a regulating valve 4 will control the negative pressure. The original negative pressure is fed by a vacuum pump 6. Under the operational condition such as low rotation, low water temperature or absolute pressure in a low suction pipe, factors matching to said condition is determined and it is calculted in a calculating circuit 7 to control the atmosphere conducting ratio of an electromagnetic valve 2 thus to reduce the lift of EGR valve 1. Consequently EGR is reduced.