WATER-COOLING APPARATUS FOR ENGINE

• US 20150053777A1
• Filed: 12/25/2012
• Published: 02/26/2015
• Est. Priority Date: 01/17/2012
• Status: Abandoned Application

• Current Assignee: Calsonic Kansei Corporation
• Original Assignee: Calsonic Kansei Corporation
• Inventors: Iwasaki, Mitsuru
• Application Number:
  US14/371,650
• Publication Number:
  US 20150053777A1
• Time in Patent Office: Days
• US Class Current: 236/34.5
• CPC Class Codes: F01P 2007/146 using valves
• CPC Class Codes: F01P 7/16 by thermostatic control
• CPC Class Codes: F01P 7/165 characterised by systems with two or more loops

Abstract

A water-cooling apparatus for cooling an engine includes a radiator for cooling coolant, a first flow passage connected with the engine, a second flow passage branched from the first flow passage and connected with the radiator, a third flow passage whose one end is connected with the radiator and whose another end is connected with the first flow passage at a downstream from the branched point of the second flow passage, a regulating valve on the first flow passage for regulating a flow volume of the coolant in the radiator, and a pump on the first flow passage for circulating the coolant through the engine and/or the radiator. The regulating valve is configured to flows the coolant from the radiator to the first flow passage when it is opened. The apparatus has a simple circulation flow path, and thereby appropriate cooling can be done by regulating the flow volume.

Claims

1. A water-cooling apparatus for an engine that cools an internal combustion engine by cooling water, the apparatus comprising:

a radiator that cools the cooling water by heat-exchanging between the cooling water and air;

a first flow passage that flows the cooling water to the engine;

a second flow passage that is branched from the first flow passage and flows the cooling water to the radiator;

a third flow passage that flows the cooling water flowing from the radiator to the first flow passage at a downstream from a branched point of the second flow passage from the first flow passage;

a regulating valve that is disposed on the first flow passage and regulates a flow volume of the cooling water flowing through the radiator; and

a pump that is disposed on the first flow passage and circulates the cooling water through the engine and/or the radiator, wherein

the regulating valve is configured to flows the cooling water flowing from the radiator to the first flow passage when opened.

2. The water-cooling apparatus for an engine according to claim 1, wherein,

in a case where temperature of the cooling water that brings most appropriate combustion efficiency in a high-load state of the engine is defined as a first temperature,

when temperature of the cooling water in the engine is equal-to or higher-than the first temperature, the regulating valve closes a flow path through the second flow passage, the radiator and the third flow passage.

3. The water-cooling apparatus for an engine according to claim 1, wherein

the pump is an electrical pump operable independently from operations of the engine.

4. The water-cooling apparatus for an engine according to claim 1, wherein,

in a case where temperature of the cooling water that brings most appropriate combustion efficiency in a high-load state of the engine is defined as a first temperature, and temperature of the cooling water that brings most appropriate combustion efficiency in a low-load state of the engine is defined as a second temperature higher than the first temperature,

when temperature of the cooling water in the engine is equal-to or higher-than the first temperature and a change of a throttle position for adjusting an intake air volume to the engine is small, the regulating valve regulates a flow volume of the cooling water to a flow path through the second flow passage the radiator and the third flow passage so that the temperature of the cooling water is regulated to be the second temperature.

5. The water-cooling apparatus for an engine according to claim 1, wherein

in a case where temperature of the cooling water that brings most appropriate combustion efficiency in a high-load state of the engine is defined as a first temperature,

when temperature of the cooling water in the engine is equal-to or higher-than the first temperature and a change of a throttle position for adjusting an intake air volume to the engine is large, the regulating valve increases a flow volume of the cooling water to a flow path through the second flow passage the radiator and the third flow passage.

6. The water-cooling apparatus for an engine according to claim 1, wherein

the engine is inclined with an exhaust side thereof faced downward.