Displacement variable oil pump and control method thereof

An oil pump and variable technology, applied in lubrication pumps, dosing devices, mechanical equipment, etc., can solve problems such as increased oil viscosity, low oil temperature at the lubricating part, pressure relief, etc. Control precise effects

CN103742776AInactive Publication Date: 2014-04-23ZHEJIANG GEELY HLDG GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2014-04-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a displacement variable oil pump and a control method thereof. According to the control method of the displacement variable oil pump, when an engine control system is judged to be in need of increasing of oil pressure, the rotating speed of a motor is increased and the revolution speed of a wheel surrounding center of a planetary gear is increased, so that the rotating speed of a driven gear is larger than the rotating speed originally provided by an internal gear, the rotating speed of an outer rotor and an inner rotor is increased, and the displacement of the oil pump is increased; when the engine control system is judged to be in need of reducing of the oil pressure, the rotating speed of the motor is reduced and the revolution speed of a wheel surrounding center of a planetary gear is reduced, so that the rotating speed of the driven gear is less than the rotating speed originally provided by the internal gear, the rotating speed of the outer rotor and the inner rotor is reduced, and the displacement of the oil pump is reduced; the rotating speed of the planetary gear is achieved to adjust due to the fact that the rotating speed of the driven gear is decided by an engine and the motor simultaneously and the rotating speed of the motor is adjusted in real time through the engine according to collected oil pressure data, so that the oil pumping amount of the oil pump can timely adapted to specific requirement of the engine at any operating point and control of the oil amount is accurate.
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Description

technical field

[0001] The invention belongs to the technical field of automobiles, and relates to an automobile part, in particular to a rotor oil pump. Background technique

[0002] At present, the oil pumps used in automobile internal combustion engines are generally fixed-displacement oil pumps, and the oil flow is proportional to the engine speed. Improvement keeps rising. Although the pressure relief valve will open after reaching a certain pressure to play a certain role in pressure regulation, the opening of the pressure relief valve is fixed and cannot be adjusted in real time, so the pressure in the oil passage will still be too high at high speed, and the pressure relief When the high-pressure engine oil returns, it will cause a certain power loss. Therefore, this type of oil pump has certain disadvantages: the throughput of the oil pump cannot meet the specific needs of the engine in time, that is, the lubrication of some parts of the engine does not need to in...

Examples

Embodiment Construction

[0031] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0032] Such as figure 1 As shown, a variable displacement oil pump includes a drive shaft 1, an oil pump casing 2 connected in series from the drive shaft 1 from left to right, an outer rotor 3, an inner rotor 4, and an oil pump end cover 5 .

[0033] The oil pump housing 2 is movably connected with the oil pump end cover 5, in the present embodiment, as figure 2 As shown, the oil pump housing 2 and the oil pump end cover 5 are respectively provided with a plurality of bolt mounting holes corresponding to the peripheral positions, so that the oil pump housing 2 and the oil pump end cover 5 can be connected via end cover screws 14 bolts . In addition, the oil pump casing 2 is provided with a rotor cavity A located in the middle and a first high-pressure oil zone 2.1 and a first low-pressure oil zone 2.3 located on both sides of the rotor cav...