| 摘要 |
The temperature of an internal combustion engine is controlled in accordance with engine operating conditions such as engine load and speed by controlling the temperature of a working fluid or fluids of the engine, such as engine intake air, engine cooling water and lubricating oil. To do this there are provided fluid temperature sensing means, engine condition detecting means, a control unit to produce a control signal and means for regulating the working fluid temperature in response to the control signal so as to bring the sensed working fluid temperature closer to a predetermined reference temperature which is set as being a function of engine operating conditions. Preferably the temperature control is operated in such a manner that the working fluid temperature is high at low engine load and low at high engine load.
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