KR20130037338A - System for driving oil pump of automotive engine - Google Patents

System for driving oil pump of automotive engine Download PDF

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Publication number
KR20130037338A
KR20130037338A KR1020110101694A KR20110101694A KR20130037338A KR 20130037338 A KR20130037338 A KR 20130037338A KR 1020110101694 A KR1020110101694 A KR 1020110101694A KR 20110101694 A KR20110101694 A KR 20110101694A KR 20130037338 A KR20130037338 A KR 20130037338A
Authority
KR
South Korea
Prior art keywords
oil
hydraulic chamber
engine
slider
spring
Prior art date
Application number
KR1020110101694A
Other languages
Korean (ko)
Inventor
이홍욱
봉하동
조명래
김성준
여경구
이상희
Original Assignee
현대자동차주식회사
기아자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대자동차주식회사, 기아자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020110101694A priority Critical patent/KR20130037338A/en
Publication of KR20130037338A publication Critical patent/KR20130037338A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N13/00—Lubricating-pumps
    • F16N13/02—Lubricating-pumps with reciprocating piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N2270/00—Controlling

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

PURPOSE: An oil pump driving system for a vehicle engine is provided to vary the driving revolutions per minute according to the revolutions per minute of the engine, thereby improving the power performance and fuel efficiency performance of a vehicle. CONSTITUTION: An oil pump driving system for a vehicle engine includes a pump housing(10), a slider(11), a spring support(12), a relief spring(14), a spring mounting part(13), and a first and a second hydraulic chamber(211,222). The relief spring is mounted on the pump housing, and provides a restoring force to the spring support. The spring mounting part for mounting the relief spring is installed in the pump housing in response to the spring support. The first and the second hydraulic chamber are formed on the outer circumferential surface of the pump housing, and are mutually blocked and partitioned so that the slider is rotated on a pivot(P) by a hydraulic force. A connection between the first and the second hydraulic chamber is selectively opened or closed.

Description

Oil Pump Drive System for Automotive Engines {SYSTEM FOR DRIVING OIL PUMP OF AUTOMOTIVE ENGINE}

The present invention relates to an oil pump driving system of a vehicle engine, and more particularly, to an oil of a vehicle engine that can improve the power performance and fuel efficiency of a vehicle by varying the driving rotation speed of the oil pump according to the rotation speed of the engine. A pump drive system.

In general, to supply oil to the engine of the vehicle is equipped with an oil pump driven by the power of the engine, and serves to suck the oil stored in the oil pan to supply each element inside the engine.

The oil pump is composed of an outer rotor and an inner rotor for pumping oil, and when the engine speed (rpm) increases, the rotation speed of the oil pump is also increased proportionally.

That is, the drive shaft of the oil pump is connected to the crankshaft at a constant rotation ratio, so that the oil pressure increases in proportion to the engine speed.

At this time, the oil pressure is too low at low speeds, which is a problem in the lubrication of each of the engine drive parts, and at high speeds, the oil pressure is excessively high and energy is excessively lost in the oil pump, thereby deteriorating engine fuel economy.

In order to solve the above problems, a two-stage variable oil pump has been proposed in the existing stationary oil pump for improving fuel economy.

The two-stage variable oil pump controls the oil pressure low in the engine low speed mode, which has a large impact on fuel economy, and refers to an oil pump that is changed in two stages to increase the oil pressure in the high speed mode where durability is important.

As described above, in the case of the electric two-stage, the solenoid valve is implemented through on / off control.

However, in the case of the currently applied two-stage variable oil pump, since the solenoid is operating in the low-speed mode where fuel economy is important, there is a problem in that fuel economy is lost due to electric load generation.

Patent Publication 10-2007-0097998

Accordingly, the present invention was created to solve the above problems, and an object of the present invention is to reduce the electrical load loss due to the solenoid operation in the low speed operation region.

Oil pump drive system of the vehicle engine according to an embodiment of the present invention for achieving this object is a pump housing having a pivot, a slider connected to the pivot rotatably around the pivot and provided in the pump housing, A spring support portion provided on the slider, a relief spring mounted on the pump housing to provide a restoring force to the spring support portion, a spring mounting portion provided on the pump housing corresponding to the spring support portion for mounting the relief spring, and the slider It characterized in that it comprises a first, the second hydraulic chamber is formed on the outer circumferential surface so as to be rotated by the hydraulic pressure to be partitioned to form a partition.

In addition, it characterized in that it comprises a first oil supply pipe communicated to supply oil to the first hydraulic chamber and a second oil supply pipe communicated to supply oil to the second hydraulic chamber.

In addition, a branch pipe is formed between the first oil supply pipe and the second oil supply pipe, characterized in that the branch pipe includes an on-off valve for selectively communicating or releasing oil to each other.

The on-off valve may be a solenoid valve that is controlled on when the engine speed is smaller than the set speed and off controlled when the engine speed is greater than the set speed.

In addition, the oil filter is formed in the first oil supply pipe and characterized in that it further comprises an oil filter for filtering foreign matter does not flow into the oil flowing into the hydraulic chamber.

As described above, according to the oil pump driving system of the vehicle engine according to the present invention, the fuel efficiency is improved by reducing the electrical load loss caused by the operation of the solenoid valve in the low speed driving region.

1 is a cross-sectional view showing an opening and closing state of the on-off valve of the oil pump drive system of the vehicle engine according to an embodiment of the present invention.
FIG. 2 is a schematic view of part A and part B of FIG. 1.
3 is a graph showing the relationship between the engine speed and the hydraulic pressure when the oil pump driving system of the vehicle engine according to an embodiment of the present invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing an opening and closing state of the on-off valve of the oil pump drive system of the vehicle engine according to an embodiment of the present invention. As illustrated, the oil pump driving system of the vehicle engine according to the exemplary embodiment of the present invention includes a pump housing 10 having a pivot, a rotor 101 rotated inside the pump housing 10, and the rotor 101. A slider 11, a first hydraulic chamber 211, and a second hydraulic chamber, which are connected to the pivot P and are provided in the pump housing 10 so as to form a space from an outer circumferential surface thereof and rotatable about the pivot P. 222).

The rotor 101 is provided to generate pressure by rotating the inside of the pump housing 10 and at the same time the plurality of vanes 15 emerge in the radial direction.

A slider 11 is disposed to form a space at a predetermined interval from the outer circumferential surface of the rotor 101. When the slider 11 is rotated about the pivot P, the slider 11 is eccentrically rotated so that the interval with the rotor 101 is variable to control the pressure. This pump configuration is a technical configuration that is generally applied, so detailed description thereof will be omitted.

The slider 11 is provided with a spring support 12, and a relief spring 14 as an elastic body that provides a restoring force to the spring support 12.

In addition, the pump housing 10 is provided with a spring mounting portion 13 for mounting the relief spring 14, the spring mounting portion 13 is formed in the shape of a groove corresponding to the spring support portion 12 of the slider (11). do. In other words, the slider 11 is elastically supported by the relief spring 14 to be eccentrically controlled.

The pump housing 10 is formed with a first hydraulic chamber 211 and a second hydraulic chamber 222. The first hydraulic chamber 211 and the second hydraulic chamber 222 are partitioned and formed so as to surround each other in a form surrounding the outer circumferential surface of the slider 11.

In addition, a first oil supply pipe 21 is formed to communicate with the first hydraulic chamber 211 to supply oil, and the second oil supply pipe communicating with the second hydraulic chamber 222 to supply oil ( 22) is formed. Here, when oil is supplied to the first hydraulic chamber 211 and the second hydraulic chamber 222 to generate hydraulic pressure, the slider 11 rotates about the pivot P and the relief spring 14 simultaneously. When the hydraulic pressure of the first and second hydraulic chambers 211 and 222 is released, the slider 11 may be returned.

A branch pipe 21a is formed to branch the supplied oil from the first oil supply pipe 21 to the second oil supply pipe 22 and communicate with the branch pipe 21a and the second oil supply pipe 22. The opening and closing valve (S) is formed in the part so that the first oil supply pipe (21) and the second oil supply pipe (22) can be blocked or communicated by the opening and closing of the opening and closing valve (S).

At this time, the on-off valve (S) may be made of a solenoid valve that is On / Off control. In other words, the on-off valve S is always maintained in an off-controlled state and is controlled to be On when the engine speed exceeds the set speed. This set rotation speed can be set to, for example, 2800 rpm to 3800 rpm.

In addition, the first oil supply pipe 21 includes an oil filter (not shown) to block in advance foreign matters into the opening / closing valve S or the first and second hydraulic chambers 211 and 222. You may. In other words, by preventing the cause of impairing the opening or closing function of the on-off valve (S) in advance will be able to further improve the abnormal operation or durability of the oil pump.

That is, FIG. 2 schematically shows the A and B portions of FIG. 1, and as shown in FIG. 2A, the opening / closing valve S is always maintained in an off state.

That is, the first oil supply pipe 21 and the second oil supply pipe 22 are both open to generate a hydraulic pressure on both sides of the first hydraulic chamber 211 and the second hydraulic chamber 222 to maintain a low oil pressure.

On the other hand, when the engine rotation speed exceeds the set rotation speed, as shown in (b) of FIG. 2, when the on-off valve S is closed (closed), the second oil supply pipe 22 is closed. Since the hydraulic pressure is generated only inside the second hydraulic chamber 222, a higher oil pressure may be generated.

As described above, the operation of the oil pump driving system of the vehicle engine according to the exemplary embodiment of the present invention will be described in detail as follows.

First, as the engine is driven in the state as shown in FIG. 1, the rotor 101 rotates about the rotation shaft 101a, wherein the rotation speed of the rotor 101 is proportional to the rotation speed of the engine.

At this time, the oil is supplied to both sides of the first hydraulic chamber 211 and the second hydraulic chamber 222 while the engine speed is less than the set rotation speed to maintain a low oil pressure and at the same time the hydraulic pressure by the rotation of the rotor 101 Is generated and when the slider 11 is urged to rotate about the pivot P, the volume is changed to control the hydraulic pressure.

In this process, the relief spring 14 is compressed by the rotating slider 11, and when the engine speed exceeds the set speed, when the on / off valve S is controlled on (closed), the second hydraulic pressure is reduced. Since the oil supply to the chamber 222 is stopped, the oil supply is performed only to the first hydraulic chamber 211, thereby generating a higher oil pressure. Therefore, the rotation angle of the slider 11 is further increased to provide a high hydraulic pressure in the process of maintaining a high RPM of the engine speed.

As described above, since the operation of the solenoid valve required in the low speed operation region of the engine can be omitted, the fuel efficiency is improved. That is, Figure 3 is a graph showing the relationship between the engine speed and the hydraulic pressure when the oil pump driving system of the vehicle engine according to an embodiment of the present invention, as shown in the prior art as the engine speed is a low speed driving region L1 To operate the solenoid valve to maintain engine oil pressure.

However, referring to L2 represented by the oil pump driving system of the vehicle engine according to an embodiment of the present invention, in contrast to the case where the engine oil pressure is maintained according to L1, the engine oil pressure by the area R by L2. It can be seen that to reduce the power required to produce a.

Thus, the experimental value performed by applying the oil pump drive system of the vehicle engine according to an embodiment of the present invention shows a 1.4% fuel economy improvement when the power source to the on-off valve S is supplied through the engine, When the power source is applied as the driving power source of the on-off valve, it can be seen that the fuel efficiency improvement of 2.2%. In addition, the power consumed during the On operation of the on-off valve exhibits a fuel efficiency improvement of 0.8% compared to the Off operation of the on-off valve.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

10: pump housing
11: slider
12: spring support
13: spring loaded
14: relief spring
15: vane
21: first oil supply line
21a: branch pipe
22: second oil supply line
101: rotor
101a: axis of rotation
211: first hydraulic chamber
222: second hydraulic chamber
S: on-off valve
P: pivot

Claims (5)

A pump housing with a pivot;
A slider connected to the pivot to be rotatable about the pivot and provided in the pump housing;
A spring support provided on the slider;
A relief spring mounted to the pump housing to provide a restoring force to a spring support;
A spring mounting portion provided in the pump housing corresponding to the spring support portion for mounting the relief spring; And
The slider includes first and second hydraulic chambers formed on an outer circumferential surface of the slider so as to be pivotally rotated about the pivot, and interlocked and partitioned, and selectively opening or closing a connection between the first hydraulic chamber and the second hydraulic chamber. An oil pump driving system of a vehicle engine, characterized in that. The method of claim 1,
And a second oil supply pipe communicated to supply oil to the second hydraulic chamber, and a first oil supply pipe communicated to supply oil to the first hydraulic chamber. The method of claim 2,
A branch pipe is formed between the first oil supply pipe and the second oil supply pipe, and the branch pipe includes an on / off valve for selectively communicating or releasing oil to each other. The method of claim 3,
The on-off valve is a solenoid valve of the vehicle engine, characterized in that the engine is maintained in the off state when the engine speed is less than the set speed, the solenoid valve is controlled on when the engine speed is greater than the set speed. The method of claim 2,
The oil pump driving system of the engine for the vehicle, characterized in that the oil filter formed in the first oil supply pipe and filters the foreign matter does not flow into the oil flowing into the hydraulic chamber further comprises.
KR1020110101694A 2011-10-06 2011-10-06 System for driving oil pump of automotive engine KR20130037338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110101694A KR20130037338A (en) 2011-10-06 2011-10-06 System for driving oil pump of automotive engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110101694A KR20130037338A (en) 2011-10-06 2011-10-06 System for driving oil pump of automotive engine

Publications (1)

Publication Number Publication Date
KR20130037338A true KR20130037338A (en) 2013-04-16

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KR1020110101694A KR20130037338A (en) 2011-10-06 2011-10-06 System for driving oil pump of automotive engine

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101509994B1 (en) * 2013-11-29 2015-04-07 현대자동차주식회사 Oil Pressure Engaging type Variable Displacement Oil Pump
KR20160066816A (en) * 2014-12-03 2016-06-13 현대자동차주식회사 Oil Supply Pressure Adjusting type Proportional Control Variable Oil Pump and Commercial Automobile Engine thereby

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101509994B1 (en) * 2013-11-29 2015-04-07 현대자동차주식회사 Oil Pressure Engaging type Variable Displacement Oil Pump
KR20160066816A (en) * 2014-12-03 2016-06-13 현대자동차주식회사 Oil Supply Pressure Adjusting type Proportional Control Variable Oil Pump and Commercial Automobile Engine thereby

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