COOLING WATER CONTROL VALVE APPARATUS

• US 20130221116A1
• Filed: 02/22/2013
• Published: 08/29/2013
• Est. Priority Date: 02/28/2012
• Status: Active Grant

• Current Assignee: Mikuni Corporation, Suzuki Motor Corporation
• Original Assignee: Mikuni Corporation, Suzuki Motor Corporation
• Inventors: Tsuchiya, Toru, Oikawa, Takumi, Daikuhara, Masayuki, Ogawa, Hiromasa, Teshi, Masaki
• Granted Patent: US 9,518,503 B2
• Time in Patent Office: Days
• US Class Current: 236/34.5
• CPC Class Codes: F01P 11/16 concerning coolant temperature F01P11/20 takes precedence
• CPC Class Codes: F01P 11/18 concerning coolant pressure, coolant flow, or liquid-coolant level
• CPC Class Codes: F01P 2003/027 Cooling cylinders and cylinder heads in parallel
• CPC Class Codes: F01P 2060/045 for transmissions
• CPC Class Codes: F01P 2060/18 Heater
• CPC Class Codes: F01P 7/14 the coolant being liquid
• CPC Class Codes: F01P 7/16 by thermostatic control
• CPC Class Codes: G05D 23/134 measuring the temperature of mixed fluid

Abstract

A cooling water control valve apparatus capable of independently controlling flow rates of cooling water in two lines with a single apparatus for cooling water control and capable of achieving cost reduction.

A cooling water control valve apparatus which adjusts a flow rate of cooling water for cooling an object to be cooled includes two inlet ports through which cooling water is introduced, an electrical control valve which is arranged at a first passage communicated with one of the inlet ports and which adjusts a flow rate of cooling water flowing through the first passage with electronic control, and a thermosensitive valve which is arranged at a second passage communicated with the other of inlet ports and which adjusts a flow rate of cooing water flowing through the second passage owing to displacement of a temperature detecting medium with temperature.

Claims

1. A cooling water control valve apparatus which adjusts a flow rate of cooling water for cooling an object to be cooled, comprising:

two inlet ports through which cooling water is introduced;

an electrical control valve which is arranged at a first passage communicated with one of the inlet ports and which adjusts a flow rate of cooling water flowing through the first passage with electronic control; and

a thermosensitive valve which is arranged at a second passage communicated with the other of inlet ports and which adjusts a flow rate of cooing water flowing through the second passage owing to displacement of a temperature detecting medium with temperature.

2. The cooling water control valve apparatus according to claim 1 to be used in an engine cooling system which includes a water jacket at a cylinder head side of an engine, a water jacket at a cylinder block side, and a circulation flow passage through which cooling water is circulated against a radiator,

wherein the one inlet port is connected to the water jacket at the cylinder head side and the other inlet port is connected to the water jacket at the cylinder block side, and

an outlet port which is communicated with the inlet ports through the first passage and/or the second passage is connected to the circulation flow passage at a side to feed cooling water to the radiator.

3. The cooling water control valve apparatus according to claim 2 to be used in the engine cooling system which includes a bypass flow passage to return cooling water out flowing from the water jacket at the cylinder head side of the engine to the water jacket at the cylinder head side and/or the water jacket at the cylinder block side as bypassing the radiator,

wherein the bypass flow passage is connected to the first passage without being routed through the electronic control valve, and

a return flow passage is arranged between the first passage and the second passage to provide continuous communication between the passages.

4. The cooling water control valve apparatus according to claim 1, comprising a check valve which provides communication between the first passage at the one inlet port side from the electronic control valve and the second passage at the other inlet port side from the thermosensitive valve and which allows cooling water to flow from the first passage to the second passage.