DE102012106716A1 - Control circuit for a variable rotary vane oil pump - Google Patents

Abstract

A variable speed vane oil pump (20) control circuit of an automatic transmission vehicle may include: the variable vane oil pump (20) which supplies a working fluid for controlling the automatic transmission, a control valve (30) mounted on a hydraulic line (21), which is in fluid communication with the variable vane oil pump (20), and a torque converter control valve (40) fluidly connected to the control valve (30) for controlling the working fluid supplied from the regulator valve (30) to allow the working fluid to flow in pressure required by a torque converter, the variable rotary vane oil pump (20) being controllable by an amount of working fluid discharged from the torque converter control valve (40).

Description

Cross-reference to related applications

The present application claims the priority of Korean Patent Application No. 10-2011-0132261 , filed in the Korean Intellectual Property Office on Dec. 9, 2011, the entire contents of which are hereby incorporated by reference.

Background of the invention

Field of the invention

The present invention relates to a control circuit for a variable rotary vane oil pump (also vane oil pump). In particular, the present invention relates to a control circuit for a variable vane oil pump in which a cam ring of the variable vane oil pump can be optimally controlled.

Description of the related art

In general, a transmission control unit (TCU) for an automatic transmission controls a friction element (actuator), such as a brake pedal. As a clutch and a brake by controlling a plurality of electromagnetic valves.

An exhaust flow / flow of a constant oil pump (constant rate pump per revolution) is generally low at a low speed and high at a high speed.

However, an exhaust performance of the oil pump required for lubricating, cooling, and operating the friction element is detected in a warmed-up idle state in which a low rotational speed and a high temperature are present. As a result, an exhaust flow of the oil pump becomes higher than a required flow at a high speed, so that loss (e) occurs and fuel efficiency decreases.

The conventional constant displacement oil pump must have a changed capacity by adjusting the width of a rotor or changing the size of a rotor to control the discharge capacity. But the fuel efficiency also decreases in this case, since also unnecessary flow / flow occurs at a high speed of the oil pump.

A variable oil pump may be a key component for improving fuel efficiency and overcoming the limitations of the constant oil pump. The variable oil pump to be used in a transmission is generally a type of rotary vane pump which is mainly developed by component developing companies / suppliers in Europe and North America.

The variable vane oil pump continuously changes the outflow of the oil to optimally control the oil pressure and flow that is used to lubricate and operate actuators of the transmission.

1 FIG. 13 is an exploded perspective view of a variable vane pump according to the conventional art. FIG. The conventional, variable rotary vane pump, as in 1 shown, may include: a housing 1 in which an opening is formed, a rotor 3 on which a plurality of wings 2 is formed on the outer periphery, a cam ring 4 which is on the circumference of the rotor 3 attached is a spring 5 which the cam ring 4 provides a spring force, a pivot 6 to rotatably fix the cam ring to the housing, and a cover 7 ,

The variable rotary vane pump changes the outflow of the oil by changing the volume of the pump. The volume of the pump can be changed by changing an eccentric in the pump by providing a control pressure to the cam ring.

In the conventional art, the control pressure is generally generated using an electromagnet, an exhaust flow of a control valve, or a return flow of an exhaust flow of the pump.

However, if the control pressure is generated by an electromagnet, the cost increases and the arrangement becomes difficult due to the addition of the electromagnet. Further, when the control pressure is generated by using the discharge flow of the control valve or the return flow of the pump, as in FIG 2 shown, then deteriorate a control response (a response of the controller) and a suction power of the pump.

The information disclosed in the section entitled "Background of the Invention" is merely for the purpose of better understanding the general background of the invention and should not be construed as an affirmative or any suggestion that such prior art information as the Expert (already) is known to belong.

Explanation of the invention

Numerous aspects of the present invention provide a control circuit (or control circuit) for a variable vane oil pump (or vane oil pump) which has the advantages of improving responsiveness (response) of the variable control and increasing a flow for controlling the variable vane oil pump ,

In one aspect of the present invention, a control circuit for a variable vane oil pump of an automatic transmission vehicle may include: the variable vane oil pump, which is a working fluid (eg, oil, among others, lubricating oil or transmission oil) for controlling the automatic transmission a control valve mounted on a hydraulic line fluidly connected to the variable vane oil pump, and a torque converter control valve fluidly connected to the control valve for controlling the working fluid supplied from the control valve to the working fluid may have a pressure required in a torque converter, wherein the variable rotary valve oil pump is controlled by an amount of working fluid, which is discharged from the torque converter control valve.

An exhaust passage of the torque converter control valve is fluidly connected to a control line of the variable vane oil pump so that the variable vane oil pump is controlled by the amount of working fluid discharged from the torque converter control valve.

The working fluid, which is discharged through an outflow conduit fluidly connected to the control valve, flows / flows to an inflow conduit which is connected to the variable rotary vane oil pump.

The working fluid of the torque converter flows through a first pipe branched from the exhaust pipe into an oil filter and an oil pan, and flows into the variable speed oil pump after passing through the oil filter and the oil pan through a second pipe.

The second pipeline is fluidly connected to the inflow line.

A restriction or throttle opening is respectively formed on the control line and on the first pipeline.

In another aspect of the present invention, the exhaust passage of the torque converter control valve and the discharge passage of the control valve are fluidly connected to each other to a third pipe, and the third pipe is connected to the control line of the variable vane oil pump.

The working fluid of the torque converter flows through a fourth pipe branched from the third pipe into the oil filter and the oil pan, and after flowing through the oil filter and the oil pan, flows through a fifth pipe into the variable rotary vane oil pump.

The fifth pipe is fluidly connected to the inflow pipe.

A restriction or throttle opening is respectively formed on the fourth pipe and on the control line.

The variable vane oil pump control circuit according to an exemplary embodiment of the present invention can improve the responsiveness of the variable control, optimally control a flow in the transmission after generating a torque converter (T / C) pressure, and prevent cavitation.

The methods and apparatus of the present invention have other features and advantages as will become apparent from the accompanying drawings, which are incorporated herein, and the following detailed description, which together serve to explain certain principles of the present invention, or to be embodied in more detail.

Brief description of the drawings

1 is an exploded perspective view of a variable rotary vane oil pump.

2 Fig. 10 is a schematic diagram of a variable vane oil pump according to the conventional art.

3 FIG. 10 is a schematic diagram of a control circuit for a variable vane oil pump according to an exemplary embodiment of the present invention. FIG.

4 FIG. 10 is a schematic diagram of a control circuit for a variable vane oil pump according to another exemplary embodiment of the present invention. FIG.

It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features. to demonstrate the basic principles of the invention. The specific design features of the present invention, including, but not limited to, e.g. Specific dimensions, directions, locations, and shapes as disclosed herein are in part dictated by the particular intended application and usage environment.

In all drawings, the same reference numerals refer to the same or equivalent components of the present invention.

Detailed description

Reference will now be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. Although the invention will be described in conjunction with the exemplary embodiments, it is to be understood that the present description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments but also various alternatives, changes, modifications and other embodiments which may be included within the spirit and scope of the invention as defined by the appended claims.

An exemplary embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

3 FIG. 10 is a schematic diagram of a control circuit for a variable vane oil pump according to an exemplary embodiment of the present invention. FIG.

As in 3 For example, a control circuit for a variable vane oil pump according to an exemplary embodiment of the present invention may include: a variable vane oil pump 20 which supplies a working fluid (eg, oil, inter alia, lubricating oil or transmission oil) for controlling the automatic transmission, a control valve 30 which is connected to a hydraulic line 21 the variable rotary vane oil pump 20 is attached, and a torque converter control valve 40 for controlling the working fluid flowing from the control valve 30 is supplied so that the working fluid has a pressure required in a torque converter, wherein the variable rotary vane oil pump 20 is controlled by the amount of working fluid supplied by the torque converter control valve 40 is omitted.

The variable rotary vane oil pump 20 is respectively connected to the hydraulic line 21 to discharge the working fluid, with a control line 22 for controlling the variable rotary vane oil pump 20 and with an inflow line 23 which sucks the working fluid.

The variable rotary vane oil pump 20 has a housing in which an opening is formed, a rotor on which a plurality of vanes are formed on an outer circumference, a cam ring formed on the circumference of the rotor 3 is mounted, a spring which provides a spring force to the cam ring, a pivot pin for rotatably securing the cam ring to the housing, and a cover.

A working fluid supplied by the variable rotary vane oil pump 20 is discharged through the hydraulic line 21 the control valve 30 fed.

At the control valve 30 according to an exemplary embodiment of the present invention, as in 3 shown is an outflow pipe 31 with the inflow line 23 the variable rotary vane oil pump 20 connected.

Part of the working fluid coming from the variable rotary vane oil pump 20 is discharged, flows / flows by flowing through the discharge line 31 and the inflow line 23 back into the variable rotary vane oil pump 20 back. As a result, a variable intake vacuum of the variable rotary vane oil pump increases 20 , and a cavitation of the variable rotary vane oil pump 20 will be prevented.

A control pressure, which from the control valve 30 is controlled, flows into the torque converter control valve 40 by flowing through a supply line 32 of the control valve 30 ,

The torque converter control valve 40 controls a pressure to a required pressure in a torque converter of an automatic transmission. The torque converter control valve 40 controls the torque converter using a control pressure generated by the inflow of the working fluid coming from the control valve 30 is omitted.

In the control circuit of the variable vane oil pump according to an exemplary embodiment of the present invention as shown in FIG 3 shown is an outlet pipe 41 the torque converter control valve 40 directly with the control line 22 the variable rotary vane oil pump 20 connected.

The variable rotary vane oil pump 20 is controlled by the amount of working fluid flowing from the outlet conduit 41 the torque converter control valve 40 is omitted, so the variable rotary vane oil pump 20 can be optimally controlled after generating a torque converter (T / C) pressure and a line pressure within the automatic transmission. In some example embodiments, as in FIG 3 shown, the outlet pipe 41 the torque converter control valve 40 be divided into two lines, one of which is a line to the control line 22 the variable rotary vane oil pump 20 connected and the other line with a first pipeline 51 connected, which with an oil filter 50 and / or an oil pan 60 communicates.

The oil filter 50 filters impurities of the working fluid so that the working fluid can be reused.

An outlet fluid of the first pipeline 51 and 61 in the gearbox are in the oil pan 60 collected, and the oil pan 60 guides the outlet fluid of the first pipeline 51 and the oil in the transmission through a second pipeline 52 the variable rotary vane oil pump 20 to.

A detailed explanation of the structure and operation of the oil filter 50 and the oil pan 60 are omitted, since these are already well known to those skilled in the art.

As in 3 According to an exemplary embodiment of the present invention, the amount of working fluid entering the variable vane oil pump may be increased 20 flows, be increased. As the outflow line 31 of the control valve 30 and the second pipeline 52 are connected to each other such that the outlet fluid of the control valve 30 to the outlet fluid of the oil pan 60 is added, a cavitation of the pump can be effectively prevented by an amount of working fluid is increased.

Furthermore, a constriction or throttle opening 70 on (in) the outlet pipe 41 the torque converter control valve 40 be educated. A constriction or throttle opening 70 can also be used on (in) the first pipeline 51 and on (in) the control line 22 be educated. As a result of this, there may be a rapid pressure drop in the control line 22 be prevented because the constriction 70 respectively the flow in the outlet line 41 , the first pipeline 51 and the control line 22 can control. The narrowing 70 may be respectively at (in) the exhaust pipe 41 , on (in) the first pipeline 51 and on (in) the control line 22 be formed, with the constriction 70 has a smaller radius than the outlet pipe 41 , the first pipeline 51 and the control line 22 to play the role of a visor, so that the narrowing 70 can control an outlet flow and a pressure.

The control circuit (or control circuit) for a variable rotary vane oil pump 20 According to an exemplary embodiment of the present invention, the responsiveness (response) of variable control may be controlled by controlling the variable vane oil pump 20 using the exhaust flow of the torque converter control valve 40 improve and prevent cavitation by returning (or circulating) the outlet flow of the control valve 30 to the variable rotary valve oil pump 20 ,

4 FIG. 10 is a schematic diagram of a control circuit for a variable vane oil pump according to another exemplary embodiment of the present invention. FIG.

As in 4 For example, a control circuit (or control circuit) for a variable vane oil pump according to another exemplary embodiment of the present invention may include: a variable vane oil pump 20 , which provides / supplies a working fluid for controlling the automatic transmission, a control valve 30 which is connected to a hydraulic line 21 the variable rotary vane oil pump 20 is attached, and a torque converter control valve 40 for controlling the working fluid flowing from the control valve 30 is supplied so that the working fluid has a pressure required in a torque converter, wherein an outlet 41 the torque converter control valve 40 and an outflow line 31 of the control valve 30 together to a third pipeline 53 connected, and the third pipeline 53 is with the control line 22 the variable rotary vane oil pump 20 connected. As a result, the variable rotary vane oil pump becomes 20 controlled by the amount of working fluid supplied by the torque converter control valve 40 and the control valve 30 is omitted.

As in 4 shown is a working fluid, which from the variable rotary vane oil pump 20 is discharged through the hydraulic line 21 the control valve 30 fed, the outflow line 31 of the control valve 30 is with the outlet pipe 41 the torque converter control valve 40 connected, and as a result thereof, the third pipeline 53 educated.

The third pipeline 53 is with the inflow line 23 the variable rotary vane oil pump 20 connected.

As a result, the response (response) of the variable Control can be improved because the amount of fluid passing through the outflow line 31 of the control valve 30 flows in the third pipeline 53 is added to the amount of fluid passing through the outlet pipe 41 the torque converter control valve 40 flows, so the amount of fluid entering the variable rotary vane oil pump 20 through the third pipeline 53 inflow is increased.

In some example embodiments, as in FIG 4 shown, the third pipe can 53 be divided into two lines, one of which is a line to the control line 22 the variable rotary vane oil pump 20 is connected and the other line with a fourth pipe 54 connected, which with an oil filter 50 and / or an oil pan 60 communicates.

An outlet fluid of the fourth pipeline 54 and oil in the gearbox are in the oil pan 60 collected, and the oil pan 60 guides the outlet fluid of the fourth pipeline 54 and the oil in the transmission through a fifth pipe 55 the variable rotary vane oil pump 20 to.

Furthermore, a constriction or throttle opening 70 to be trained. The narrowing 70 is respectively on the control line 22 and the fourth pipeline 54 formed, with the constriction 70 has a smaller radius than the control line 22 and the fourth pipeline 54 to play the role of a visor, so that the narrowing 70 can control an outlet flow and a pressure.

As in 4 shown, the control circuit (or control circuit) for a variable rotary vane oil pump 20 According to another exemplary embodiment of the present invention, the control response (the control response) by controlling the variable vane oil pump 20 using the exhaust flow of the torque converter control valve 40 and the outlet flow of the control valve 30 improve.

While the invention has been described in conjunction with exemplary embodiments which are presently considered to be desirable, it is to be understood that the invention is not limited to the embodiments disclosed herein. On the contrary, the invention is intended to cover various alternatives and modifications which may be included within the spirit and scope of the appended claims.

For ease of explanation and precise definition of the appended claims, the terms "upper", "lower", "inner" and "outer" are used to refer to features of the exemplary embodiments to describe positions of these features shown in the drawings.

The foregoing description of certain exemplary embodiments of the present invention has been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many changes and modifications are possible in light of the above teachings. The exemplary embodiments have been chosen and described to describe certain principles of the invention and its practicability, thereby enabling one skilled in the art to make and use various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is desired that the scope of the invention be defined by the appended claims.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• KR 10-2011-0132261 [0001]

Claims (10)

A control circuit for a variable rotary vane oil pump ( 20 ) of a vehicle with automatic transmission, comprising: the variable rotary vane oil pump ( 20 ), which supplies a working fluid for controlling the automatic transmission, a control valve ( 30 ), which on a hydraulic line ( 21 ) fitted with the variable rotary vane oil pump ( 20 ) is fluidly connected, and a torque converter control valve ( 40 ), which with the control valve ( 30 ) is fluidly connected, for controlling the working fluid which is supplied by the control valve ( 30 ), so that the working fluid has a pressure required in a torque converter, wherein the variable rotary vane oil pump ( 20 ) is controlled by an amount of working fluid supplied by the torque converter control valve ( 40 ) is omitted. The control circuit according to claim 1, wherein an exhaust pipe ( 41 ) of the torque converter control valve ( 40 ) with a control line ( 22 ) of the variable rotary vane oil pump ( 20 ) is fluidly connected so that the variable rotary vane oil pump ( 20 ) is controlled by the amount of working fluid supplied by the torque converter control valve ( 40 ) is omitted. The control circuit according to claim 2, wherein the working fluid passing through an outflow conduit ( 31 ) connected to the control valve ( 30 ) is fluidly connected, is discharged, to an inflow line ( 23 ), which with the variable rotary vane oil pump ( 20 ) connected is. The control circuit of claim 3, wherein the working fluid of the torque converter is through a first pipeline ( 51 ), which from the outlet ( 31 ) is branched into an oil filter ( 50 ) and an oil pan ( 60 ) flows, and after flowing through the oil filter ( 50 ) and the oil pan ( 60 ) through a second pipeline ( 52 ) into the variable rotary vane oil pump ( 20 ) flows. The control circuit according to claim 4, wherein the second pipeline ( 52 ) with the inflow line ( 23 ) is fluidly connected. The control circuit according to claim 4, wherein a constriction ( 70 ) respectively on the control line ( 22 ) and on the first pipeline ( 51 ) is trained. The control circuit according to claim 3, wherein the outlet line ( 41 ) of the torque converter control valve ( 40 ) and the outflow line ( 31 ) of the control valve ( 30 ) with each other with a third pipeline ( 53 ) are fluidly connected, and the third pipeline ( 53 ) is connected to the control line ( 22 ) of the variable rotary vane oil pump ( 20 ) connected. The control circuit of claim 7, wherein the working fluid of the torque converter is through a fourth pipeline ( 54 ), which from the third pipeline ( 53 ) is branched into the oil filter ( 50 ) and the oil pan ( 60 ) flows, and after flowing through the oil filter ( 50 ) and the oil pan ( 60 ) through a fifth pipeline ( 55 ) into the variable rotary vane oil pump ( 20 ) flows. The control circuit according to claim 8, wherein the fifth pipeline ( 55 ) with the inflow line ( 23 ) is fluidly connected. The control circuit according to claim 8, wherein a constriction ( 70 ) at the fourth pipeline ( 54 ) and on the control line ( 22 ) is trained.

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