Patent ID: 9002625
Filing Date: 2015-04-07
Classification: F02B,F02D,Y02T

Abstract:
1. A control device for an internal combustion engine equipped with a supercharger, comprising: operation state detection unit configured to detect an operation state of the internal combustion engine; overlap read unit configured to read a valve overlap period; collector pressure detection unit configured to detect a collector pressure; exhaust gas pressure estimation unit configured to estimate an exhaust gas pressure on an upstream side of the supercharger; and scavenging amount estimation unit configured to estimate a scavenging amount based on the operation state, the valve overlap period, the collector pressure, and the exhaust gas pressure, wherein the exhaust gas pressure estimation unit comprises: wherein the exhaust gas pressure estimation unit estimates the exhaust gas pressure by correcting an estimated value of the exhaust gas pressure in the steady operation state by an estimated value of the exhaust-gas-pressure-change amount in the transient operation state, and wherein the transient-exhaust-gas-pressure-variation amount estimation module estimates the exhaust-gas-pressure-change amount in the transient operation state by considering a pressure loss of the supercharger based on a change speed of an intake air amount or a throttle valve opening area.