KR20080102614A - A parking device for automatic transmission and control method thereof - Google Patents

A parking device for automatic transmission and control method thereof Download PDF

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Publication number
KR20080102614A
KR20080102614A KR1020070049272A KR20070049272A KR20080102614A KR 20080102614 A KR20080102614 A KR 20080102614A KR 1020070049272 A KR1020070049272 A KR 1020070049272A KR 20070049272 A KR20070049272 A KR 20070049272A KR 20080102614 A KR20080102614 A KR 20080102614A
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KR
South Korea
Prior art keywords
shift lever
hydraulic
sprag
parking
discharge
Prior art date
Application number
KR1020070049272A
Other languages
Korean (ko)
Inventor
양홍준
Original Assignee
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 기아자동차주식회사 filed Critical 기아자동차주식회사
Priority to KR1020070049272A priority Critical patent/KR20080102614A/en
Publication of KR20080102614A publication Critical patent/KR20080102614A/en

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    • 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
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms
    • F16H63/3416—Parking lock mechanisms or brakes in the transmission
    • F16H63/3425—Parking lock mechanisms or brakes in the transmission characterised by pawls or wheels
    • F16H63/3433—Details of latch mechanisms, e.g. for keeping pawls out of engagement
    • 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
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms
    • F16H63/3416—Parking lock mechanisms or brakes in the transmission
    • F16H63/3483—Parking lock mechanisms or brakes in the transmission with hydraulic actuating 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
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/48—Signals to a parking brake or parking lock; Control of parking locks or brakes being part of the transmission

Abstract

A parking device for the auto transmission and the control method thereof are provided to fix the hitch bed of sprag to the concavo-convex region of the parking gear by protruding the piston due to the fluid pressure supplied from the valve body. A parking device for the auto transmission comprises the fixing unit supplying the fluid pressure to the hydraulic chamber or ejects and operates the piston in the concavo-convex region inside of the parking gear; the hydraulic hose supplying the line pressure to the hydraulic passage from the valve body; the feeding valve controlling open and close the hydraulic hose according to the control signal; the discharge hose in which one end is connected to the exhaust path; the exhaust valve controlling the open and close of the discharge hose according to the control signal; the shift lever position sensor(41) sensing the location of gearshift and outputting the position signal; the gearshift locking switch(43) outputting the signal for locking release; the foot-brake active sensor(45) outputting the operation signal by the operator in the operation of foot-brake; the controller(50) outputting the control signal of the exhaust valve and the feeding valve.

Description

Parking device for automatic transmission and its control method {A PARKING DEVICE FOR AUTOMATIC TRANSMISSION AND CONTROL METHOD THEREOF}

1 is an internal configuration of a parking device for an automatic transmission according to the prior art.

2 is a view for explaining the problems of the prior art.

3 is an internal configuration diagram of a parking device for an automatic transmission according to an embodiment of the present invention.

4 is an enlarged view of a main part for explaining the operation of the parking device for an automatic transmission according to an embodiment of the present invention.

5 is an enlarged cross-sectional view of a portion A of FIG. 4.

6 is an enlarged view of a main part for explaining the deactivated state of the parking device for an automatic transmission according to an embodiment of the present invention.

7 is a flowchart illustrating a control method of a parking device for an automatic transmission according to an embodiment of the present invention.

The present invention relates to a parking device for an automatic transmission and a control method thereof. More specifically, the parking gear for the sprag is configured by the hydraulic pressure supplied from the valve body during the parking operation. The parking device for the automatic transmission and its control method to be fixed to the concave-convex portion, and when the parking release is released so that the hydraulic pressure is released to form a gap between the end of the sprag and the concave-convex portion of the parking gear to be easily separated. will be.

In general, automatic transmissions are equipped with a parking device that locks the parking gear fixedly mounted on the output shaft in the "P" range to maintain a stopped state of the vehicle.

Such a parking device moves when the shift lever is moved to the "P" range, and the parking rod linked thereto operates the sprag so that its sprag tip is inserted into the uneven portion formed by the outer periphery of the parking gear, thereby locking. will be.

That is, when looking at the prior art of the parking device as described above in detail, as shown in Figure 1, when the shift lever 101 is converted to the "P" range, the detent plate 100 is linked to the parking rod 102 The parking rod 102 is formed to be pushable, and the parking rod 102 of the sprag 108 is hingedly fixed to the transmission case 107 while the roller 104 formed along the roller support 106 is advanced along the roller support 106. The rear end is lifted upward.

Then, while the front end of the sprag 108 is lowered, the locking end 110 is inserted into the concave-convex portion 114 formed on the outer circumference of the parking gear 112 to lock.

Of course, the sprag 108 in the above is subjected to an elastic force so that the front end portion is always lifted upward by the return spring 116.

However, the parking device for the conventional automatic transmission as described above, as shown in Figure 2, when parking on the slope, the locking end 110 is caught in the uneven portion 114 of the parking gear 112, the driver shifts the lever ( When 101) is changed to another stage, the operation is difficult and a large operation force is required.

At this time, in the process of the driver moving from the "P" range to the "R" range with a large operating force, the shift lever 101 moves to the "N" range past the "R" range and generates an unparking shock. If you operate the shift lever 101 to reverse immediately after parking, you will experience the misoperation of the "P" range-> "R" range-> "N" range-> "R" range. There is a problem that acts as an element of complaint

Therefore, the present invention was created in order to solve the above problems, the object of the present invention is configured inside the locking end of the sprag is acted by the hydraulic pressure supplied from the valve body during the parking operation the locking end of the sprag is parked A parking device for an automatic transmission and a method of controlling the same, which are fixed to an uneven portion of the gear, and when the parking is released, the hydraulic pressure is released to form a gap between the end of the sprag and the uneven portion of the parking gear so that it can be easily separated. To provide.

According to an aspect of the present invention, there is provided a parking device for an automatic transmission, including a detent plate installed on one side of a transmission case via a manual shaft to interlock with a shift lever; A parking gear installed on the transmission output shaft; A sprag which is hinged to have a rotation center on the transmission case of the upper one side of the output shaft, and one end of which is formed a locking end that corresponds to an uneven portion of the parking gear; In the automatic transmission parking device including a return spring is installed at the center of rotation to return the sprag, the hydraulic chamber constituting the piston on both sides in the engaging end of the sprag, and the front end of the sprag Fixing means for forming the hydraulic passage and the discharge passage connected to the hydraulic chamber along the inside to supply or discharge the hydraulic pressure to the hydraulic chamber to operate the piston inside the uneven portion of the parking gear; One end is connected to the hydraulic passage, the other end is connected to one side of the valve body hydraulic hose for supplying the line pressure from the valve body to the hydraulic passage; A supply valve configured at one side of the hydraulic hose and fixed to the transmission case and controlling the opening and closing of the hydraulic hose according to a control signal; A discharge hose having one end connected to the discharge passage; A discharge valve connected to the other end of the discharge hose and fixed to the transmission case to open and control the discharge hose according to a control signal; A shift lever position sensor for detecting a position of the shift lever and outputting a position signal; A shift lever locking switch which is operated by a driver to release the locking state of the shift lever and outputs a signal when the shift lever is unlocked; A foot brake operation sensor which outputs an operation signal when the foot brake is operated by a driver; And a controller for outputting control signals of the supply valve and the discharge valve according to signals of the shift lever position sensor, the shift lever locking switch, and the foot brake operation sensor.

Here, the fixing means is installed on both sides of the piston so as not to be separated through the locking step in the interior of the hydraulic chamber so as to protrude to the front and rear sides of the sprag engaging end, the discharge passage is formed branched from one side of the hydraulic passage It is characterized by.

And the control method of the parking device for an automatic transmission includes a first step of the driver starting the engine by the ignition key ON (ON); A second step of determining whether the shift lever is positioned in the "P" range while the engine is driven; A third step of determining whether the foot brake is in an operating state when the condition is satisfied; A fourth step of determining whether the shift lever is in the unlocked state when the condition is satisfied in the third step; In the fourth step, if the condition is satisfied, a fifth step of controlling the discharge valve "ON", the supply valve "OFF" control; If the condition of any one of the second, third, and fourth steps is not satisfied, the discharge valve includes a sixth step of controlling " OFF " and the supply valve of " ON ". .

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in detail.

Figure 3 is an internal configuration of the parking device for automatic transmission according to an embodiment of the present invention, Figure 4 is an enlarged view of the main part for explaining the operation of the parking device for automatic transmission according to an embodiment of the present invention, Figure 5 is an enlarged cross-sectional view of part A of FIG. 4.

A parking device for an automatic transmission according to an embodiment of the present invention is connected to an external manual control lever 7 through a manual shaft 5 inside the transmission case 3 so as to interlock with a shift lever 1. Detent plate 9 is installed.

The detent plate 9 is formed to push the parking rod 23. The parking rod 23 is a transmission case in which a roller 25 formed at a tip thereof is advanced along a roller support 27. It is comprised so that the rear end part of the sprag 15 hinged by (3) may be lifted upwards.

A locking end 19 is formed at the front end of the sprag 15, and a parking gear 13 is installed at the transmission output shaft 11. That is, while the leading end of the sprag 15 is lowered, the locking end 19 is inserted into the uneven portion 17 formed on the outer periphery of the parking gear 13 to lock.

In addition, on the sprag 15, a return spring 21 is installed at the center of rotation of the sprag 15 for the return operation.

And the locking end 19 of the sprag 15 is configured with a fixing means for fixing the locking end 19 inside the uneven portion 17 of the parking gear 13, the fixing means, As shown in FIG. 5, the hydraulic chamber 33 constituting the piston 31 is formed on both sides of the locking end 19, and the hydraulic chamber 33 is formed along the tip end of the sprag 15. And a hydraulic passage L1 and a discharge passage L2 connected to each other to supply or discharge hydraulic pressure to the hydraulic chamber 33 so that the pistons 31 at both sides of the uneven portion 17 of the parking gear 13 are formed. Is configured to operate.

Here, the both piston 31 is installed so as not to be separated through the locking jaw 35 in the hydraulic chamber 33 so as to protrude to the front and rear sides of the sprag locking end 19, the discharge passage (L2) Is branched from one side of the hydraulic passage (L1) is formed.

In the above, the end of the hydraulic passage (L1) is connected to the hydraulic hose (H1) through one end, the hydraulic hose (H1) is connected to one side of the valve body 40, the other end of the valve body (40) And to supply the line pressure from the hydraulic passage L1.

And a supply valve (V1) is installed on one side of the hydraulic hose (H1), the supply valve (V1) is fixed to the transmission case (3), opening and closing the hydraulic hose (H1) in accordance with a control signal Control.

In addition, the discharge hose (H2) is connected to the end of the discharge passage (L2) through one end, and the discharge valve (V2) is installed at the other end of the discharge hose (H2).

The discharge valve (V2) is fixed to the transmission case (3) in a state connected to the other end of the discharge hose (H2), it is controlled to open and close the discharge hose (H2) in accordance with a control signal.

In addition, a shift lever position sensor 41 for detecting a position of the shift lever 1 and outputting a position signal is provided, and is operated by a driver to release a locking state of the shift lever 1, The shift lever locking switch 43 outputs a signal when the shift lever 1 is unlocked, and a foot brake actuating sensor 45 outputs an operation signal when the foot brake is operated by a driver. .

The shift lever position sensor 41, the shift lever locking switch 43, and the foot brake actuation sensor 45 are electrically connected to the controller 50, respectively, and the controller 50 is the shift lever position sensor 41. ), And outputs the control signals of the supply valve V1 and the discharge valve V2 according to the signals of the shift lever locking switch 43 and the foot brake operation sensor 45.

Therefore, in the control method of the parking device for automatic transmission according to the present embodiment having the configuration as described above, as shown in Fig. 7, the driver starts the engine by the ignition key ON (S1).

Then, the controller 50 receives the signal of the shift lever position sensor 41 while the engine is driven to determine whether the shift lever 1 is located in the "P" range.

At this time, when it is determined in step S2 that the shift lever 1 is located in the "P" range, the controller 50 receives the signal of the foot brake actuation sensor 450 to determine whether the foot brake is in an operating state. (S3)

In the step S3, when the foot brake is in the operating state, the controller 50 receives the signal of the shift lever locking switch 43 again to determine whether the shift lever 1 is in the unlocked state. )

When the shift lever 1 is in the unlocked state even in the step S4, the controller 50 determines that all the conditions of the steps S2, S3, and S4 are satisfied, and the discharge valve V2 is " ON " "Control, the supply valve (V1) is controlled to" OFF ", discharge hose (H2) is opened, supply hose (H1) is closed (S5), as shown in Figure 6, acting on the hydraulic chamber 33 The hydraulic pressure is discharged, so that both pistons 31 are inserted into the hydraulic chamber 33 so as to space the gap between the engaging end 19 of the sprag 15 and the uneven portion 17 of the parking gear 13. By forming the engaging end 19 is a state that can be easily separated from the uneven portion 17 enables the parking release operation.

On the other hand, if any one of the above step (S2), step (S3) and step (S4) does not satisfy the condition, the controller 50 controls the discharge valve (V2) "OFF" discharge hose (H2) And the supply valve V1 is controlled to " ON " to open the supply hose H1. (S6)

That is, at this time, the locking end 19 of the sprag 15 is inserted into the uneven portion 17 of the parking gear 13, as shown in Figs. 4 and 5, the hydraulic chamber 33 The hydraulic pressure supplied from the valve body 40 acts so that both pistons 31 protrude out of the hydraulic chamber 33 so that the locking end 19 of the sprag 15 is uneven 17 of the parking gear 13. It will remain fixed in between.

According to the parking device for automatic transmission according to the present embodiment, the piston 31 is protruded by the hydraulic pressure supplied from the valve body 40 during the parking operation, so that the engaging end 19 of the sprag 15 is moved to the parking gear ( 13) is fixed to the concave-convex portion 17, and when the parking is released, the hydraulic pressure is released to form a gap between the engaging end 19 of the sprag 15 and the concave-convex portion 17 of the parking gear 13. By being able to be separated easily, parking is possible with a small operating force when parking on a slope or the like.

As described above, according to the parking device for an automatic transmission and the control method thereof according to the present invention, during the parking operation, the piston protrudes by hydraulic pressure supplied from the valve body so that the end of the sprag is fixed to the uneven portion of the parking gear. When the parking is released, the hydraulic pressure is released to form a gap between the locking end of the sprag and the uneven portion of the parking gear so that it can be easily separated. When the driver changes the shift lever 101 to another stage, it is possible to solve the conventional problem that the operation was difficult.

In addition, since a large operation force is not required, there is an effect of eliminating the fear of erroneous operation and improving the merchandise.

Claims (3)

A detent plate installed on one side of the transmission case through a manual shaft to interlock with the shift lever; A parking gear installed on the transmission output shaft; A sprag which is hinged to have a rotation center on a transmission case of an upper side of the output shaft, and one end of which is formed a hook end that corresponds to an uneven portion of the parking gear; A parking device for an automatic transmission comprising a return spring installed at a center of rotation of the sprag for return operation. Form a hydraulic chamber constituting the piston on both sides inside the engaging end of the sprag, and along the inside of the distal end of the sprag to form a hydraulic passage and a discharge passage connected to the hydraulic chamber to supply the hydraulic pressure to the hydraulic chamber or A fixing means for discharging the piston to operate the piston in the uneven portion of the parking gear; One end is connected to the hydraulic passage, the other end is connected to one side of the valve body hydraulic hose for supplying the line pressure from the valve body to the hydraulic passage; A supply valve configured at one side of the hydraulic hose and fixed to the transmission case and controlling the opening and closing of the hydraulic hose according to a control signal; A discharge hose having one end connected to the discharge passage; A discharge valve connected to the other end of the discharge hose and fixed to the transmission case to open and control the discharge hose according to a control signal; A shift lever position sensor for sensing a position of the shift lever and outputting a position signal; A shift lever locking switch which is operated by a driver to release the locking state of the shift lever and outputs a signal when the shift lever is unlocked; A foot brake operation sensor which outputs an operation signal when the foot brake is operated by a driver; A controller for outputting control signals of the supply valve and the discharge valve according to signals of the shift lever position sensor, the shift lever locking switch, and the foot brake operation sensor; Parking device for an automatic transmission comprising a. The method of claim 1, The fixing means Both pistons are installed in the hydraulic chamber so as to protrude to both front and rear sides of the sprag locking end so as not to be separated through the locking jaw, and the discharge passage is branched from one side of the hydraulic passage. Parking device for The method of claim 1, A first step of the driver starting the engine by the ignition key ON; A second step of determining whether the shift lever is positioned in the "P" range while the engine is driven; A third step of determining whether the foot brake is in an operating state when the condition is satisfied; A fourth step of determining whether the shift lever is in the unlocked state when the condition is satisfied in the third step; In the fourth step, if the condition is satisfied, a fifth step of controlling the discharge valve "ON", the supply valve "OFF" control; If the conditions of any one of the second, third and fourth stages are not satisfied, the discharge valve includes a sixth step of controlling "OFF", and the supply valve "ON" control. Control method of parking device for automatic transmission.
KR1020070049272A 2007-05-21 2007-05-21 A parking device for automatic transmission and control method thereof KR20080102614A (en)

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Application Number Priority Date Filing Date Title
KR1020070049272A KR20080102614A (en) 2007-05-21 2007-05-21 A parking device for automatic transmission and control method thereof

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KR1020070049272A KR20080102614A (en) 2007-05-21 2007-05-21 A parking device for automatic transmission and control method thereof

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190074645A (en) * 2017-12-20 2019-06-28 한호산업(주) Parking apparatus for transmission apparatus of electric vehicle and method for fault detecting thereof
CN110748642A (en) * 2019-10-31 2020-02-04 威马智慧出行科技（上海）有限公司 Automobile P-gear parking control method, electronic equipment and automobile
CN112628398A (en) * 2020-12-10 2021-04-09 安徽江淮汽车集团股份有限公司 Shafting locking device and automobile
KR20230025174A (en) 2021-08-13 2023-02-21 현대트랜시스 주식회사 Parking device for automatic transmission
KR20230031632A (en) 2021-08-27 2023-03-07 현대트랜시스 주식회사 Parking device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190074645A (en) * 2017-12-20 2019-06-28 한호산업(주) Parking apparatus for transmission apparatus of electric vehicle and method for fault detecting thereof
CN110748642A (en) * 2019-10-31 2020-02-04 威马智慧出行科技（上海）有限公司 Automobile P-gear parking control method, electronic equipment and automobile
CN110748642B (en) * 2019-10-31 2021-11-19 威马智慧出行科技（上海）有限公司 Automobile P-gear parking control method, electronic equipment and automobile
CN112628398A (en) * 2020-12-10 2021-04-09 安徽江淮汽车集团股份有限公司 Shafting locking device and automobile
CN112628398B (en) * 2020-12-10 2021-11-26 安徽江淮汽车集团股份有限公司 Shafting locking device and automobile
KR20230025174A (en) 2021-08-13 2023-02-21 현대트랜시스 주식회사 Parking device for automatic transmission
KR20230031632A (en) 2021-08-27 2023-03-07 현대트랜시스 주식회사 Parking device

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