Title:
WAX TYPE THERMOSTAT FOR VEHICULAR ENGINE WITH HIGH COOLING EFFICIENCY
Document Type and Number:
Japanese Patent JP3203360
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain wax type thermostat with high cooling efficiency which can reduce an upper limit of temperature of cooling water of a vehicular engine from the conventional value of 123°C to 81°C or lower by interlocking with a cooling fan switch.
SOLUTION: Thickness of a side wall of a center hole of an elastic sealing spool 5 engaged with a rod 2 is extremely thinned. A spring constant of a return spring 13 is reduced to half by dispensing with a jiggle valve mechanism. An operation temperature range of a thermostat is concentrated on a state shifting area where wax 7 is changed from solid to liquid. An upper limit of water temperature is lowered to 81°C or lower by interlocking a cooling fan switch. A conventional flow amount of cooling water is doubled by the use of 50% of self potential or less.
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Inventors:
Yoshikazu Kuze
Application Number:
JP21953198A
Publication Date:
August 27, 2001
Filing Date:
June 30, 1998
Export Citation:
Assignee:
Yoshikazu Kuze
International Classes:
F01P7/16; F16K31/68; (IPC1-7): F16K31/68; F01P7/16
Domestic Patent References:
| JP2217680A | ||||
| JP7127533A | ||||
| JP882217A | ||||
| JP988597A |