Internal-combustion engines – Cooling – With vapor generation and/or condensing
Patent
1986-02-07
1987-05-26
Cuchlinski, Jr., William A.
Internal-combustion engines
Cooling
With vapor generation and/or condensing
123 4127, 165 41, F01P 322
Patent
active
046676260
ABSTRACT:
In order to avoid the need to provide auxiliary pumps and the like to obviate cavitation problems in the coolant return pump and the coolant jacket of an evaporative cooling type engine cooling system, a heater circulation pump which circulates heated coolant through a cabin heating circuit is selectively connected with a reservoir in which liquid coolant is stored and energized to pump fresh relatively cool coolant into the coolant jacket in the event that the normal coolant return pump is sensed as operating continuously for more than a predetermined period of time and thus ensure that the level of coolant in the coolant jacket is maintained at an appropriate level. Upon a positive pressure developing in the system a valve upstream of the coolant return pump is opened and hot coolant is displaced out to the reservoir. When a negative pressure develops the aforementioned valve is opened and fresh cool coolant from the reservoir is inducted into the system upstream of the pump to alleviate pump cavitation.
REFERENCES:
patent: 2844129 (1958-07-01), Beck, Jr. et al.
patent: 4367699 (1983-01-01), Evans
patent: 4508264 (1985-04-01), Takeda et al.
patent: 4563983 (1986-01-01), Hayashi et al.
Hayashi Yoshimasa
Hirano Yoshinori
Cuchlinski Jr. William A.
Nissan Motor Co,. Ltd.
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