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    • 2. 发明公开
    • Temperature control system for internal combustion engine
    • 用于内燃发动机的温度控制装置。
    • EP0156078A1
    • 1985-10-02
    • EP84309109.1
    • 1984-12-27
    • BORG-WARNER CORPORATION
    • Sturges, Fred Deahl
    • F01P7/16F01P7/04B60H1/32
    • B60H1/3205B60H1/00764F01P7/044F01P7/16F01P2025/04F01P2025/13F01P2025/40F01P2070/06F01P2070/08
    • @ When additional heat exchangers, such as oil coolers (11) and turbocharged air coolers (12), are mounted in front of or within the normal coolant heat exchanger or radiator (10) of an internal combustion engine, a variable speed fan drive (14) may be employed to blow air through all of the heat exchangers to cool the various fluids flowing through those heat exchangers. Since the different fluids usually have different desired operating temperature ranges for optimum engine performance, controlling the variable speed fan drive (14) only in response to the temperature ofthe engine coolant can result in overheating of at least one of the other fluids. This is avoided by temperature sensing (16,31,37) the different fluids and effectively determining which one of them has the highest relative temperature in its operating range. The fan drive is then controlled in response to the sensed temperature of that particular fluid. In this way, all of the fluids will be maintained within their desired operating temperature ranges. If the condenser (13) of an air conditioning system is also positioned in front of the engine coolant radiator (10), the compressor discharge pressure in the system may be monitored (66) and if it exceeds a preset maximum allowable level the fan is automatically driven atfull speed to maximize the air pulled in through the condenser, and of course through all of the other heat exchangers, to quickly decrease the refrigerant temperature and thus the discharge pressure.
    • 5. 发明公开
    • Engine temperature control system
    • 用于内燃发动机的温度控制装置。
    • EP0154090A1
    • 1985-09-11
    • EP84308625.7
    • 1984-12-12
    • BORG-WARNER CORPORATION
    • Spokas, Romas BalysSturges, Fred Deahl
    • F01P7/16F01P7/04B60H1/32
    • F01P7/044F01P7/048F01P7/12F01P7/16F01P2070/08
    • The operating temperature of an internal combustion engine is maintained within desired limits by employing a single coolant temperature sensor (10) for controlling and coordinating the operation of three different temperature control devices (45, 46, 47) for the engine coolant. When the sensed coolant temperature is in a relatively low range a flow control valve (45) controls the amount of coolant diverted from the engine jacket to a radiator (48) to dissipate heat absorbed by the coolant from the engine. If the coolant temperature exceeds that low range, even though the control valve (45) is fully open and all of the coolant is circulated through the radiator (48), the sensor (10) then effects the opening of radiator shutters (46) to cause ram air to impinge on the radiator (48) to increase the cooling of the coolant. If the temperature still continues to rise after the shutters (46) are fully open, the coolant sensor (10) causes operation of a variable speed fan drive (47) to blow a sufficient amount of air through the radiator (48) to cool the coolant back down to the desired operating range. Such sequential operation of the three control devices (45,46,47) provides close temperature control within a relatively narrow range despite wide variations of external conditions and load on the engine, resulting in higher efficiency and longer engine life.