Title:
ENGINE COOLING DEVICE
Document Type and Number:
Japanese Patent JPH02153219
Kind Code:
A
Abstract:
PURPOSE:To decrease a coolant temperature even when a high boiling point coolant is used so as to keep lubrication of a piston system well by using a control valve which can be changed over in accordance with engine speed and circulating the coolant through a radiator when the engine works at low speed. CONSTITUTION:A cooling system 19 consists of radiator circulation routes 7, 11-16 connected to a radiator 2 and by-pass routes 9, 10 branched therefrom and by-passing the radiator 2. In this case, the first change-over valve 4 to make a coolant flow through the circulation routes 7, 11-13, 16 when the coolant temperature goes up higher than a preset upper limit value is provided in the cooling system 19. Additionally, the second change-over valve 5 to make the coolant flow through the by-pass route 9 when the coolant temperature goes down below a preset lower limit value is provided. Furthermore, a control valve 6 is provided to make the coolant flow through the circulation routes 7, 11-15 when the coolant temperature is between the preset upper limit value and the preset lower limit value and the engine 1 is driven at low speed and to make the coolant flow through the by-pass route 10 when the engine 1 is driven at high speed.
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Inventors:
FUSE TAKU
TERAUCHI SEIJI
KURISU TORU
NOMURA KAZUMASA
TERAUCHI SEIJI
KURISU TORU
NOMURA KAZUMASA
Application Number:
JP30422688A
Publication Date:
June 12, 1990
Filing Date:
December 02, 1988
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
F01P7/16; (IPC1-7): F01P7/16
Attorney, Agent or Firm:
Kensuke Isshiki (1 person outside)