ENGINE OIL SUPPLY APPARATUS

• US 20160222843A1
• Filed: 08/17/2015
• Published: 08/04/2016
• Est. Priority Date: 08/27/2014
• Status: Active Application

• Current Assignee: Mazda Motor Corporation
• Original Assignee: Mazda Motor Corporation
• Inventors: KOGUCHI, Tomohiro, HONDA, Kenta
• Granted Patent: US 10,267,190 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F01M 1/02 using lubricating pumps pumps in general F04; lubricating pumps per se F16N
• CPC Class Codes: F01M 1/08 Lubricating systems characterised by the provision therein of lubricant jetting means
• CPC Class Codes: F01M 1/16 Controlling lubricant pressure or quantity rendering machines or engines inoperative or idling on lubricant pressure failure F01M1/22
• CPC Class Codes: F01M 11/02 Arrangements of lubricant conduits
• CPC Class Codes: F01M 5/002 Cooling
• CPC Class Codes: F16N 2280/00 Valves

Abstract

An engine oil supply apparatus includes: an oil pump; an oil supply path which supplies oil to a hydraulic operating section of an engine; an oil cooler which is provided on the oil supply path and which cools oil discharged from the oil pump; and a control apparatus which sets a required oil pressure required from the hydraulic operating section in accordance with an operation state of the engine, as a target oil pressure, and controls the discharge amount of the oil pump so that an oil pressure inside the oil supply path equals the target oil pressure. The control apparatus controls the oil pump so that, during an operation state of the engine where the oil enters a prescribed high oil temperature state, the oil is discharged in an amount exceeding a discharge amount corresponding to the required oil pressure of the hydraulic operating section.

Claims

1. An engine oil supply apparatus comprising:

an oil pump, the discharge amount of which can be controlled;

an oil supply path which supplies oil discharged from the oil pump to a hydraulic operating section of an engine;

an oil cooler which is provided on the oil supply path and which cools oil discharged from the oil pump; and

a control apparatus which sets a required oil pressure required from the hydraulic operating section in accordance with an operation state of the engine, as a target oil pressure, and controls the discharge amount of the oil pump so that an oil pressure inside the oil supply path equals the target oil pressure, wherein

the control apparatus controls the oil pump so that, during an operation state of the engine where the oil enters a prescribed high oil temperature state, the oil is discharged in an amount exceeding a discharge amount corresponding to the required oil pressure of the hydraulic operating section in accordance with the operation state of the engine.

2. The engine oil supply apparatus according to claim 1, wherein

the control apparatus sets, as the target oil pressure, maximum oil pressure which exceeds the required oil pressure of the hydraulic operating section and which is set in advance, in the operation state of the engine where the high-oil temperature state is created.

3. The engine oil supply apparatus according to claim 1, wherein

when the hydraulic operating section is defined as a first hydraulic operating section,

the oil supply path includes an upstream-side oil path which supplies oil discharged from the oil pump to the first hydraulic operating section, and a downstream-side oil path which is connected to the upstream-side oil path and which supplies oil to a second hydraulic operating section whose required oil pressure is lower than that of the first hydraulic operating section,

the downstream-side oil path is provided with an oil pressure sensor which detects an oil pressure in the downstream-side oil path and an oil pressure adjusting apparatus capable of adjusting the oil pressure, and

when causing the oil pump to discharge oil in an amount exceeding a discharge amount corresponding to the target oil pressure, the control apparatus controls the oil pressure adjusting apparatus so as to adjust the oil pressure of the downstream-side oil path in accordance with a required oil pressure of the first hydraulic operating section.

4. The engine oil supply apparatus according to claim 1, further comprising an oil temperature sensor which detects an oil temperature in the oil supply path, wherein

the control apparatus determines that the engine is in the operation state where the high-oil temperature state is created when the oil temperature detected by the oil temperature sensor is equal to or higher than a prescribed temperature.

5. The engine oil supply apparatus according to claim 1, further comprising an oil supply section which is connected to the oil supply path and which injects oil to a piston when a specific operation state having at least one of a prescribed engine revolution or higher and a prescribed engine load or higher is established, wherein

the control apparatus determines that the engine is in the operation state where the high-oil temperature state is created, when the specific operation state is established.