Patent ID: 9228538
Filing Date: 2016-01-05
CPC Classification: F02B,F02D,F02M,Y02T

Claim Text:
1. An internal combustion engine, comprising: a turbo charger having a turbine provided in an exhaust passage; a waste gate valve capable of performing opening and closing control of a bypass passage that bypasses the turbine; an EGR valve capable of performing opening and closing control of an EGR passage that connects the exhaust passage provided upstream of the turbine and an intake passage; a plurality of actuators that include the waste gate valve, and a controller programmed to: set operation amounts of the plurality of actuators that include the waste gate valve, the EGR valve and a throttle valve provided in the intake passage, and influence an EGR amount, in response to a change of an operator request, wherein the operation amounts are related actuator positions; estimate a time transition of the EGR amount in a case in which operations of the plurality of actuators are simultaneously started based on an EGR amount correlation value at each time point, in accordance with the set operation amounts of the plurality of actuators, wherein the EGR amount correlation value is calculated by multiplying a pressure difference value by an opening area of the EGR valve, wherein the pressure difference value is obtained by subtracting intake pressure from a back pressure corresponding to opening and closing conditions of the waste gate valve; determine an establishment of a determination condition that the EGR amount becomes larger than an allowable value in the time transition; when the determination condition is not established, simultaneously start the operation of the plurality of actuators; and when the determination condition is established, start operations of one or more actuators decreasing the EGR amount included in the plurality of actuators, then after the operations of the one or more actuators are completed, start operations of the other actuators increasing the EGR amount included in the plurality of actuators.