RELIEF DEVICE FOR OIL CIRCUIT OF ENGINE

• US 20150377234A1
• Filed: 06/25/2015
• Published: 12/31/2015
• Est. Priority Date: 06/30/2014
• Status: Abandoned Application

• Current Assignee: Yamada Manufacturing Company Limited (Fujimak Corporation)
• Original Assignee: Yamada Manufacturing Company Limited (Fujimak Corporation)
• Inventors: MIYAJIMA, Junichi, WATANABE, Takatoshi, KATO, Yuya
• Application Number:
  US14/750,910
• Publication Number:
  US 20150377234A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F01C 21/10 Outer members for co-operation with rotary pistons; Casings casings for rotary engines or machines in general F16M
• CPC Class Codes: F01M 1/02 using lubricating pumps pumps in general F04; lubricating pumps per se F16N
• CPC Class Codes: F01M 1/18 Indicating or safety devices concerning lubricant level F01M11/06, F01M11/12
• CPC Class Codes: F01M 1/20 concerning lubricant pressure
• CPC Class Codes: F04C 11/00 Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type combinations of such pumps specially adapted for elastic fluids F04C23/00; Pumping installations F04C13/00 takes precedence; specially adapted for elastic fluids F04C23/00; fluid gearing F16H
• CPC Class Codes: F04C 14/24 characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valvesF04C14/10 takes precedence
• CPC Class Codes: F04C 2/102 the two members rotating simultaneously around their respective axes
• CPC Class Codes: F04C 2210/206 Oil
• CPC Class Codes: F04C 2270/19 Temperature
• CPC Class Codes: F04C 2270/58 Valve parameters

Abstract

A relief device including: an oil pump; an upstream flow passage provided from a discharge section side of the oil pump to an engine; an oil-pressure relief valve relieving oil by a valve body moving due to oil pressure; and a temperature-sensitive relief valve B relieving oil by detecting an oil temperature and opening and closing steplessly. The oil-pressure relief valve and the temperature-sensitive relief valve are disposed in parallel in the upstream flow passage. A portion of the pump housing of the oil pump is formed in an integrated fashion with a casing of an oil circulation mechanism.

Claims

1. A relief device for an oil circuit of an engine,

the relief device comprising:

an oil pump;

an upstream flow passage provided from a discharge section side of the oil pump to an engine;

an oil-pressure relief valve relieving oil by a valve body moving due to oil pressure; and

a temperature-sensitive relief valve relieving oil by detecting an oil temperature and opening and closing steplessly, wherein

the oil-pressure relief valve and the temperature-sensitive relief valve are disposed in parallel arrangement in the upstream flow passage, and a portion of a pump housing of the oil pump is formed in an integrated fashion with a casing of an oil circulation mechanism.

2. The relief device for an oil circuit of an engine according to claim 1, wherein, when the oil temperature is low, the temperature-sensitive relief valve relieves oil.

3. The relief device for an oil circuit of an engine according to claim 1, wherein, when the oil temperature is medium, the amount of oil relieved by the temperature-sensitive relief valve becomes greater near a low oil temperature, and becomes smaller near a high oil temperature.

4. The relief device for an oil circuit of an engine according to claim 1, wherein, when the oil temperature is high, the temperature-sensitive relief valve does not relieve oil.

5. The relief device for an oil circuit of an engine according to claim 1, wherein the pump housing is configured by a housing main body section and a housing cover section, and the housing main body section is formed in an integrated fashion with the casing of the oil circulation mechanism.

6. The relief device for an oil circuit of an engine according to claim 1, wherein the pump housing is configured by a housing main body section and a housing cover section, and the housing main cover section is formed in an integrated fashion with the casing of the oil circulation mechanism.