Patent ID: 7261067
Filing Date: 2007-08-28
Classification: F01P,F02D,Y02T

Abstract:
1. A thermostat monitoring system, comprising: a coolant temperature detection element for detecting the coolant temperature; an intake air temperature detection element for detecting the temperature of ambient air introduced into combustion chambers; an intake air amount detection element for detecting the amount of intake air; an engine speed detection member for detecting the engine speed; a blower switch for detecting a selected contacting point for driving a blower motor; and a control unit for calculating a primary modeled coolant temperature and an auxiliary modeled coolant temperature based on information detected by the coolant temperature detection element, the intake air temperature detection element, the intake air amount detection element, the engine speed detection element, and the blower switch, and for monitoring using the primary modeled coolant temperature and the auxiliary modeled coolant temperature to determine whether a thermostat is in a stuck-open state.