Patent ID: 9255534
Filing Date: 2016-02-09
CPC Classification: F02B,F02D,Y02T

Claim Text:
1. A control device for an internal combustion engine with a turbo-supercharger including a variable valve mechanism comprising: an exhaust combustion controller configured to increase energy for rotating a turbine of the turbo-supercharger by burning mixture gas of exhaust gas and scavenging gas at an upstream side of the turbo-supercharger; a temperature estimating controller configured to estimate the temperature of an exhaust catalyst provided in an exhaust passage; a scavenging amount setting controller configured to set a scavenging amount based on an upper limit temperature of the exhaust catalyst and an estimated temperature of the exhaust catalyst; a variable valve controller configured to control the duration of a valve overlap period according to the scavenging amount, an emission estimating controller configured to estimate a NOx emission amount exhausted from the internal combustion engine to the exhaust passage; wherein the scavenging amount setting controller is further configured to calculate the scavenging amount based on an estimated value of the NOx emission amount and set the smaller one of the scavenging amount based on the estimated value of the NOx emission amount and the scavenging amount calculated based on the upper limit temperature of the exhaust catalyst and the estimated temperature of the exhaust catalyst as the scavenging amount.