초록 ▼

A temperature control system is provided for an internal combustion engine having an engine block, a water pump, and an exhaust manifold and a radiator. The system includes a first sensor for sensing an engine operation parameter indicative of engine oil temperature and provides an engine operation

A temperature control system is provided for an internal combustion engine having an engine block, a water pump, and an exhaust manifold and a radiator. The system includes a first sensor for sensing an engine operation parameter indicative of engine oil temperature and provides an engine operation parameter signal indicative thereof. A second sensor senses an ambient condition and provides an ambient condition signal indicative of the ambient condition. An exhaust heat assembly is positioned adjacent to the exhaust manifold and is adapted for receiving a flow of temperature control fluid. The exhaust heat assembly permits heat conduction from the exhaust manifold to the temperature control fluid. A first control valve controls flow of temperature control fluid between the engine and radiator. A second control valve controls flow of temperature control fluid between the engine and the exhaust heat assembly. An engine computer controls the actuation of the control valves based on (i) a comparison of the engine operation parameter signal to a first engine temperature threshold value and (ii) a comparison of the engine operation parameter signal and the ambient condition signal to a set of predetermined values which have an ambient condition component and an engine operation parameter component. Methods for controlling the temperature of the temperature control fluid are also described.

대표청구항 ▼

[ I claim:] [1.] A temperature control system for an internal combustion engine having an engine block, a water pump, and an exhaust manifold, the temperature control system controlling flow of temperature control fluid through the engine, the temperature control system comprising:a first sensor for

[ I claim:] [1.] A temperature control system for an internal combustion engine having an engine block, a water pump, and an exhaust manifold, the temperature control system controlling flow of temperature control fluid through the engine, the temperature control system comprising:a first sensor for sensing an engine operation parameter which is indicative of the temperature of the engine oil and for providing an engine operation parameter signal indicative thereof;a second sensor for sensing an ambient condition and for providing an ambient condition signal indicative thereof;an exhaust heat assembly positioned adjacent to the exhaust manifold adapted for receiving a flow of temperature control fluid, the exhaust heat assembly permitting heat from the exhaust manifold to be conducted to the temperature control fluid;a first control valve for controlling flow of temperature control fluid between the engine and a radiator, the first control valve having a first position wherein flow of temperature control fluid between the engine and the radiator is inhibited, and a second position wherein flow of temperature control fluid between the engine and the radiator is permitted;a second control valve for controlling flow of temperature control fluid between the engine and the exhaust heat assembly, the second control valve having a first position wherein flow of temperature control fluid between the engine and the exhaust heat assembly is inhibited, and a second position wherein flow of temperature control fluid between the engine and the exhaust heat assembly is permitted; andan engine computer for controlling the actuation of the control valves between their first and second positions, the engine computer receiving the engine operation parameter signal and the ambient condition signal, the engine computer comparing the engine operation parameter signal to a first engine temperature threshold value and controlling the actuation of the first control valve as a function of that comparison, and the engine computer comparing the engine operation parameter signal and the ambient condition signal to a set of predetermined values having an ambient condition component and an engine operation parameter component, the engine computer controlling the actuation of the second control valve as a function of that comparison.