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engine hydraulic control system

A hydraulic control system and engine technology, applied in the direction of engine control, combustion engine, engine components, etc., can solve the problems of oil pressure drop, increased oil consumption, and difficulty in maintaining oil pressure

Active Publication Date: 2021-05-14
MAZDA MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, if the VVT ​​starts to operate while the partial cylinder operation is performed, there is a problem that the oil consumption temporarily increases and the oil pressure drops because the oil is supplied to the VVT, and it becomes difficult to maintain the oil pressure

Method used

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  • engine hydraulic control system
  • engine hydraulic control system
  • engine hydraulic control system

Examples

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Embodiment Construction

[0043] Hereinafter, exemplary embodiments will be described with reference to the drawings.

[0044]

[0045] figure 1 is a schematic sectional view of the engine 100 . The engine 100 is an inline four-cylinder engine mounted on an automobile. Four cylinders (from one end, sequentially referred to as a first cylinder, a second cylinder, a third cylinder, and a fourth cylinder) are arranged side by side in the cylinder arrangement direction ( figure 1 , in the direction perpendicular to the paper surface). In order to suppress an increase in fuel consumption, etc., the engine 100 is configured such that, depending on the operating state of the engine 100, an operation in which all cylinders are activated (full cylinder operation) and an operation in which some cylinders are stopped such as half of the cylinders are stopped (partial cylinder operation) are selected. to switch between.

[0046] The engine 100 includes a cylinder head 1 , a cylinder block 2 installed under t...

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Abstract

The invention discloses a hydraulic control system of an engine. The engine (100) has a plurality of cylinders. The hydraulic control system includes a valve stop mechanism (45d, 46d) that switches from full cylinder operation to partial cylinder operation, a VVT (18) that can change the switching time of the valve 14 under the full cylinder operation and partial cylinder operation, and the oil pressure passage. Engine oil is supplied to an oil pump (31) and a control device (60) of a hydraulic operating device including these valve stop mechanisms (45d, 46d) and a VVT (18). The control device (60) controls so that the maintenance oil pressure required to maintain the operating state of the valve stop mechanism (45d, 46d) increases in a region where the viscosity of the engine oil is high during partial cylinder operation.

Description

technical field [0001] The invention relates to a hydraulic control system of an engine, which has a variable phase gas distribution mechanism and a valve stop mechanism, both of which work by hydraulic pressure. Background technique [0002] For example, Patent Document 1 discloses such an engine hydraulic control system. [0003] The engine is equipped with many oil pressure working devices that work by oil pressure, such as variable phase valve train (VVT), valve stop mechanism, etc. Normally, pressurized oil is supplied to these hydraulic working devices through an oil pressure passage adjusted to a predetermined oil pressure (target oil pressure) by an oil pump. [0004] Partial cylinder operation is performed by the operation of the valve stop mechanism, but in order to maintain this operating state, it is necessary to ensure the oil pressure (maintaining oil pressure) required to maintain the operating state in the valve stop mechanism. On the other hand, if the targ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D13/06F02D13/02F01L1/344
CPCF01L1/3442F02D13/0215F02D13/0253F02D13/06F01L1/185F01L1/2405F01L13/0005F01L2001/0537F01L2001/34423F01L2001/3443F01L2013/001F01L2810/02F01L2820/01F02D41/0087F02D2041/0012F02D2041/1431F02D2200/023F02D2200/024Y02T10/12F01L2001/34426
Inventor 西本敏朗桥本真宪
Owner MAZDA MOTOR CORP