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Method for operating an internal combustion engine having a multi-stage oil pump

A technology for internal combustion engines and oil pumps, which is applied in the lubrication of engines, pressure lubrication of lubrication pumps, lubrication pumps, etc.

Active Publication Date: 2013-01-09
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the predetermined adjustment angle is not reached, then assume the camshaft adjuster is faulty

Method used

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  • Method for operating an internal combustion engine having a multi-stage oil pump
  • Method for operating an internal combustion engine having a multi-stage oil pump
  • Method for operating an internal combustion engine having a multi-stage oil pump

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Embodiment Construction

[0019] The present invention relates to an internal combustion engine, as in figure 1 As shown schematically in , the internal combustion engine has an engine block 10 , an oil pump 12 and an engine oil circulation device 14 designed in particular for pressure circulation lubrication. The adjustable hydraulic components, whose operating fluid is required for their actuation, are supplied by the engine oil of the engine oil circuit 14 , are connected into the engine oil circuit 14 for pressure circulation lubrication. The regulation of the fluid flow, that is to say the engine oil flowing through the hydraulic components, takes place via electrical control signals from the electronic control unit 22 . Such an adjustable hydraulic component is a hydraulic camshaft adjuster 18 for adjusting a camshaft 16 having hydraulic valves, which are designed, for example, as solenoid valves. In other words, the actuator for adjusting the camshaft is integrated into the engine oil circuit. ...

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Abstract

The invention relates to a method for operating an internal combustion engine, wherein in an oil circuit (14) of the internal combustion engine, in particular for forced-feed lubrication, a first oil pressure stage having a first minimum and maximum oil pressure level and at least one second oil pressure stage having a second minimum and maximum oil pressure level are alternatively produced by an oil pump (12), wherein the first minimum oil pressure level is less than or equal to the second minimum oil pressure level and the first maximum oil pressure level is less than the second maximum oil pressure level, wherein a camshaft (16) of the internal combustion engine is hydraulically adjusted by an actuator (18) by means of an oil pressure from the oil circuit (14) of the internal combustion engine. During the adjustment, a first adjustment speed of the camshaft (16) is set by the actuator (18) while the first oil pressure stage is produced by the oil pump (12), wherein a second adjustment speed of the camshaft (16) is set by the actuator (18) for at least one second oil pressure stage while the second oil pressure stage is produced by the oil pump (12), wherein at least one difference between the first and at least one second adjustment speed is determined, wherein a switching mechanism (20) of the oil pump (12) for switching between the oil pressure stages is classified as being in order if a magnitude of the difference is greater than or equal to a predetermined difference value, and the switching mechanism (20) of the oil pump (12) for switching between the oil pressure stages is classified as defective if a magnitude of the difference is less than a predetermined difference value.

Description

technical field [0001] According to the preamble of claim 1, the invention relates to a method for operating an internal combustion engine, wherein in the oil circuit of the internal combustion engine, in particular for pressure cycle lubrication, an oil pump optionally generates a A first oil pressure stage having a first minimum oil pressure level and a maximum oil pressure level and at least one second oil pressure stage having a second minimum oil pressure level and a maximum oil pressure level, wherein the first minimum oil pressure level is less than or equal to the first oil pressure level Two minimum oil pressure levels, and a first maximum oil pressure level less than a second maximum oil pressure level, wherein the camshaft of the internal combustion engine is hydraulically adjusted by the actuator with oil pressure from the oil circulation of the internal combustion engine. Background technique [0002] Internal combustion engines usually have a mechanically drive...

Claims

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Application Information

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IPC IPC(8): F01M1/02F01M1/18F01L1/344F16N13/00F04C14/00
CPCF01M1/16F01L2001/3445F01L1/34F01M1/18F01M1/02
Inventor D.温德里希A.瓦赫滕多夫
Owner VOLKSWAGEN AG
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