Cooling system for vehicle
First Claim
1. A cooling system for a vehicle configured so as to vary draft volume to the radiator through which engine cooling medium is circulated in accordance with operating conditions of the engine, comprising:
- a plurality of motor fans for air cooling the radiator,sensor means for sensing the temperature of the cooling medium at both the inlet and outlet sides of the radiator, andan operational mode control means, responsive to the outputs of said sensor means, for selectively controlling a plurality of operational modes programmed to selectively supply power to each of said plurality of motor-fans in order to optimize draft volume to the radiator, thereby enabling fine adjustment of draft volume to the radiator in order to effect a desired cooling of the engine;
wherein said operational modes include a parallel drive mode for parallely providing power to each of said plurality of motor-fans, a serial drive mode for serially providing power thereto, a parallel drive mode for providing power to less than all of said plurality of motor-fans, and an OFF mode for disconnecting all said plurality of motor-fans from the power source; and
wherein said operational mode control means selectively controls the control mode of the system according to the Table
space="preserve" listing-type="tabular">______________________________________ Conditions 1 2 3 4 5 6 7 8 ______________________________________ air OFF o o o o conditioner switch ON o o o o Temper- up to o o o o ature of T.sub.1 water from above o o o o radiator T.sub.1 Temper- up to o o o o ature of T.sub.2 water into above o o o o radiator T.sub.2 driving OFF LO MI HI LO LO HI HI mode of motor- fans ______________________________________ wherein T2 is greater than T1, HI indicates a parallel drive mode, MI indicates a partial drive mode, LO indicates a serial drive mode and OFF indicates an OFF mode.
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Accused Products
Abstract
A cooling system for a vehicle is configured so as to adjust draft volume to the radiator through which engine cooling water is circulated on the basis of the engine operating condition e.g. the temperature of engine cooling water. The cooling system comprises a plurality of motor-fans for cooling the radiator, engine cooling water sensor means provided at radiator hoses, and operational mode control means responsive to the sensor means to selectively control operational modes including a parallel drive mode, a serial drive mode, a partial or single drive mode and an OFF mode. Thus, a desired power supply control for motor-fans is carried out in accordance with an operational mode selected by the operational mode control means, thereby enabling to finely adjust draft volume to effect a desired cooling of the engine.
29 Citations
4 Claims
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1. A cooling system for a vehicle configured so as to vary draft volume to the radiator through which engine cooling medium is circulated in accordance with operating conditions of the engine, comprising:
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a plurality of motor fans for air cooling the radiator, sensor means for sensing the temperature of the cooling medium at both the inlet and outlet sides of the radiator, and an operational mode control means, responsive to the outputs of said sensor means, for selectively controlling a plurality of operational modes programmed to selectively supply power to each of said plurality of motor-fans in order to optimize draft volume to the radiator, thereby enabling fine adjustment of draft volume to the radiator in order to effect a desired cooling of the engine; wherein said operational modes include a parallel drive mode for parallely providing power to each of said plurality of motor-fans, a serial drive mode for serially providing power thereto, a parallel drive mode for providing power to less than all of said plurality of motor-fans, and an OFF mode for disconnecting all said plurality of motor-fans from the power source; and wherein said operational mode control means selectively controls the control mode of the system according to the Table
space="preserve" listing-type="tabular">______________________________________ Conditions 1 2 3 4 5 6 7 8 ______________________________________ air OFF o o o o conditioner switch ON o o o o Temper- up to o o o o ature of T.sub.1 water from above o o o o radiator T.sub.1 Temper- up to o o o o ature of T.sub.2 water into above o o o o radiator T.sub.2 driving OFF LO MI HI LO LO HI HI mode of motor- fans ______________________________________wherein T2 is greater than T1, HI indicates a parallel drive mode, MI indicates a partial drive mode, LO indicates a serial drive mode and OFF indicates an OFF mode. - View Dependent Claims (2, 3, 4)
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Specification