Engine lubricating system and control method thereof

A lubrication system and engine technology, which is applied in the direction of engine lubrication, engine load, engine speed, etc., and can solve problems such as the control strategy of the piston cooling nozzle check valve that is not clearly stated

Active Publication Date: 2021-07-30
DONGFENG MOTOR GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the control strategy of the piston cooling nozzle check valve in case of failure is not clearly stated

Method used

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  • Engine lubricating system and control method thereof
  • Engine lubricating system and control method thereof

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Embodiment Construction

[0027] The following specific embodiments are used to further describe the technical solution of the claims of the present invention in detail, so that those skilled in the art can understand the claims more clearly. The protection scope of the present invention is not limited to the following specific examples. The protection scope of the present invention includes the technical solution of the claims of the present invention made by those skilled in the art and is different from the following specific embodiments.

[0028] Such as figure 1 As shown, an engine lubricating system includes a variable displacement oil pump 3, an oil filter 4, and a cylinder body main oil passage 5 connected in sequence. One end of the cylinder body main oil passage 5 passes through the oil pump feedback oil passage 33, The oil pump OCV valve 31 is connected to the oil return port of the variable displacement oil pump 3, and the other end is connected to the piston cooling nozzle 8 through the p...

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Abstract

The invention discloses an engine lubricating system. The system comprises a variable displacement oil pump, an oil filter and a cylinder body main oil duct which are sequentially connected in series, one end of the cylinder body main oil duct is connected to an oil return opening of the variable displacement oil pump through an oil pump feedback oil duct and an oil pump OCV in sequence, the other end of the cylinder body main oil duct is connected to a piston cooling nozzle through a piston cooling nozzle oil duct and a piston cooling nozzle OCV in sequence, the oil pump OCV is connected with an oil pump one-way valve in parallel, and the piston cooling nozzle OCV is connected with a piston cooling nozzle one-way valve in parallel. The signal input end of a control unit is connected with an oil pressure sensor and an engine, and the signal output end of the control unit is connected with the oil pump OCV and the piston cooling nozzle one-way valve. The invention further discloses a control method of the engine lubricating system. The control method comprises the steps that judgment is conducted according to four obtained parameters and signals, and four control modes are executed. The situation that a piston cannot be lubricated due to failure of a lubricating system control valve is avoided, and the situation that the piston cannot be lubricated under long-term low-load low-rotating-speed conditions is avoided.

Description

technical field [0001] The invention relates to the technical field of engine lubrication, in particular to an engine lubrication system and a control method thereof. Background technique [0002] The existing engine lubrication system independently controls the variable displacement oil pump and the electronically controlled piston cooling nozzle through the engine's working load, oil temperature, oil pressure and other parameters, and effectively combines the two to realize the engine oil in the engine lubrication system. thermal management. However, the existing technologies are all based on the consideration of reducing fuel consumption, using a large number of electronically controlled parts (OCV valves). In the case of failure of these electronically controlled parts, the system will not work normally, which may cause damage to the engine, and at low speed and low load Failure to inject oil from the piston cooling nozzle in time will cause engine damage. [0003] Chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01M1/02F01M1/08F01M1/10F01M1/16F01M1/20
CPCF01M1/02F01M1/08F01M1/10F01M1/16F01M1/20F01M2250/62F01M2250/64
Inventor 施发义欧阳丹刘向晖熊迪向飞
Owner DONGFENG MOTOR GRP
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