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Method for operating variable displacement oil pump

A displacement oil pump, variable technology, applied in the direction of pressure lubrication, pump control, pump components, etc. of the lubricating pump, which can solve the problems of inaccurate and not very effective engine coolant temperature.

Inactive Publication Date: 2012-07-04
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, engine coolant temperature is imprecise relative to oil temperature, so these strategies are usually not very effective

Method used

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  • Method for operating variable displacement oil pump
  • Method for operating variable displacement oil pump
  • Method for operating variable displacement oil pump

Examples

Experimental program
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Embodiment Construction

[0063] Two embodiments of the invention are disclosed hereinafter with reference to an internal combustion engine 10 of a motor vehicle, such as a diesel engine or a gasoline engine,

[0064] The internal combustion engine 10 is equipped with a lubricating circuit 20 in which lubricating oil circulates in order to cool and lubricate the rotating or sliding components of the internal combustion engine 10 .

[0065] In fact, the lubricating circuit 20 schematically comprises an oil pump 21 driven by the engine 10 , which draws lubricating oil from a sump and which conveys this oil under pressure through a main oil circuit (not shown) realized in the cylinder of the engine 10 lubricating oil.

[0066] The main oil circuit is connected via respective pipes to a number of outlets for lubricating crankshaft bearings (main and big end bearings), camshaft bearings operating valves, tappets and similar, from which the lubricating oil is ultimately returned to the sump.

[0067] A radi...

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PUM

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Abstract

A method is provided for operating a variable displacement oil pump (21) of an internal combustion engine (10), that includes, but is not limited to measuring a value (EMT) of an engine metal temperature and of preventing the variable displacement oil pump (21) to switch from an high displacement configuration to a low displacement configuration, as long as the measured value is greater than a first threshold value (T1) of the engine metal temperature.

Description

technical field [0001] The present invention generally relates to a method for operating a variable displacement oil pump (VDOP) belonging to the lubrication circuit of a motor vehicle internal combustion engine, such as a diesel or gasoline engine. Background technique [0002] Internal combustion engines are known to include a lubrication circuit suitable for lubricating the rotating and sliding components of the engine. [0003] This lubrication circuit usually consists of an engine-driven oil pump which draws oil from an oil sump and conveys it under pressure through the main oil circuit realized in the cylinder block. [0004] The main oil circuit is connected to multiple outlets through their respective passages, and is used to lubricate crankshaft bearings (main bearings and big end bearings), camshaft bearings for operating valves, tappets, etc., from which lubricating oil is finally returned to the oil sump. [0005] In order to reduce polluting emissions and fuel ...

Claims

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Application Information

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IPC IPC(8): F01M1/16F01M1/02
CPCF01M1/16F04C2270/205F04C2270/19F01M5/005F04C14/18F04C2210/14F01M1/02
Inventor A.瓦萨罗G.戴维
Owner GM GLOBAL TECH OPERATIONS LLC