Patent ID: 6347608
Filing Date: 2002-02-19
Classification: F02N,Y02T

Abstract:
A control apparatus for an internal combustion engine installed in a vehicle equipped with a brake booster that boosts a brake operating force by using a negative pressure, the control apparatus comprising:a pressure detector that detects a pressure in the brake booster; and a controller that: (i) automatically stops the internal combustion engine when a predetermined stop condition is met, and automatically starts the internal combustion engine when a predetermined start condition is met; (ii) performs at least one of (a) output of a warning and (b) execution of an engine restart operation, when the pressure detected by the pressure detector exceeds a reference value while the internal combustion engine is automatically stopped; and (iii) changes the reference value in accordance with an atmospheric pressure, wherein the controller: estimates a first pressure value that corresponds to an atmospheric pressure around the vehicle; determines a second pressure value based on the estimated first pressure value; and changes the reference value based on the determined second pressure value.