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Coolant circulation system for engine

A circulation system and coolant technology, applied in engine cooling, coolant flow control, liquid cooling, etc.

Active Publication Date: 2015-03-25
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Also, in the case where the block flow rate decreases during engine warming operation, when the coolant is distributed to the various heat exchangers from the block passages, the coolant may not be distributed to the heat exchangers at a desired flow rate.

Method used

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  • Coolant circulation system for engine
  • Coolant circulation system for engine
  • Coolant circulation system for engine

Examples

Experimental program
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Embodiment Construction

[0025] Exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0026] exist figure 1 In the coolant circulation system of the exemplary embodiment shown in , the coolant discharged from the pump 10 flows through water jackets respectively provided in the cylinder block portion 21 and the cylinder head portion 22 of the engine 20 . The water jacket provided in the cylinder block portion 21 is a cylinder block passage 21a, and the water jacket provided in the cylinder head portion 22 is a cylinder head passage 22a. like figure 1 As shown, the cylinder block passage 21a and the cylinder head passage 22a are connected parallel to each other. Cylinder block portion 21 houses pistons therein, and cylinder head portion 22 defines combustion chambers of engine 20 .

[0027] The coolant flowing out of the cylinder block passage 21 a and the cylinder head passage 22 a flows into the radiator 40 through the control valve u...

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Abstract

A coolant circulation system for an engine includes a cylinder block passage and a cylinder head passage, which are provided respectively in a cylinder block portion and a cylinder head portion of the engine. These two passages serve as passages through which a coolant flows to cool the cylinder block portion and the cylinder head portion. The cylinder block passage and the cylinder head passage are connected in parallel to each other. The coolant circulation system further includes a first heat exchanger connected to the cylinder block passage, a second heat exchanger connected to the cylinder head passage, a radiator connected to both the cylinder block passage and the cylinder head passage, and a control unit capable of controlling flow rates of the coolant flowing through the cylinder block passage and the cylinder head passage respectively.

Description

technical field [0001] The present disclosure relates to a coolant circulation system in which coolant flows through a block portion and a head portion of an engine to cool the engine. Background technique [0002] For example, when the engine is heated, it is preferable to rapidly increase the lubricating oil temperature for the engine so as to reduce the friction loss between the cylinder block portion of the engine and the piston. In this case, increasing the temperature of the cylinder block portion (cylinder block temperature) may take precedence over increasing the temperature of the cylinder head portion of the engine having the combustion chamber (cylinder head temperature). Therefore, friction loss can be effectively reduced. [0003] In the circulation system described in Patent Document 1 (JP6-193443A), a block portion of an engine has block passages through which coolant flows, and a cylinder head portion of the engine has head passages through which coolant flo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01P7/16
CPCF01P7/16F01P7/167F01P2060/08F01P2060/16F01P2003/027F01P2060/04
Inventor 宫川雅志
Owner DENSO CORP
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