CN203363121U

CN203363121U - Four-to-five speed upgrade control mechanism in automatic gearbox

Info

Publication number: CN203363121U
Application number: CN 201320185176
Authority: CN
Inventors: 刘汉斌; 张文阁; 张宝华
Original assignee: DONGYING TAIENSI POWER TRANSMISSION EQUIPMENT Co Ltd
Current assignee: DONGYING TAIENSI POWER TRANSMISSION EQUIPMENT Co Ltd
Priority date: 2013-04-15
Filing date: 2013-04-15
Publication date: 2013-12-25
Anticipated expiration: 2023-04-15

Abstract

The utility model discloses a four-to-five speed upgrade control mechanism in an automatic gearbox and the technical scheme thereof is that a dynamic transmission mechanism of a crude oil gearbox is maintained and a B0 pressure relief valve and a B0 pressure relief control valve are added in a hydraulic control mechanism in order to control pressurization of a B2 brake and pressure relief of a B0 brake, and the pressure relief of the B0 brake can be realized at once and a C0 clutch is opened when the pressure in the B2 brake reaches an operating pressure, thus two-to-three gear upgrade can be realized; and reversing of an improved three-to-four shift valve can be independently controlled through adding an electromagnetic valve, thus independent control of B0 and C0 can be realized and the objective of four-to-five speed upgrade is reached. The four-to-five speed upgrade control mechanism in the automatic gearbox in the utility model has advantages that (1) the objective of four-to-five speed upgrade can be realized through changing a hydraulic oil way thereof; and (2) changes in the hydraulic system is less than that in the prior art. Through simulation and road test with car loading, the shift comfort in the five-speed gear box is improved to an extent in comparison with that in the four-speed gearbox and oil consumption is also reduced. Practice has proved that the hydraulic control system is practical.

Description

Automatic transmission case four-speed five speed control mechanisms of upgrading

Technical field

The utility model relates to automotive transmission (gearbox) field, and particularly for the AT42Q4ZC automatic transmission case on the basis constant at power transmission structure, the improvement by hydraulic system control oil circuit realizes automatic transmission case four-speed five speed control mechanisms of upgrading.

Background technique

Automatic gearbox of vehicles, along with the development of vehicle technology and correlation technique thereof produces, can be divided into four-stage automatic speed changing in earlier stage, hydraulic automatic gear shift stage, electric control automatic gear shifting stage and intelligent speed changing stage substantially.

The hydraulic automatic gearbox is comprised of fluid torque converter and planetary transmission, and control system is to carry out the generation of control signal by hydraulic system, is mainly to realize by the throttler valve of reaction accelerator open degree size and the governor valve of reaction speed of a motor vehicle height.Hydrovalve and oil circuit that hydraulic control system is complicated by several form, and control the action of gear-shifting actuating mechanism according to the process of power shift of setting; Thereby realize automaitc shfit.

The AT42QZC automatic transmission case is the domestic a four-speed hydraulic automatic gearbox comparatively generally used, and mainly power transmission machinery structure and hydraulic control two large divisions, consists of.

Wherein power transmission machinery structure mainly comprises input, output shaft and three planet rows, O/D planet row, front planet row and rear planet row; Executive component comprises three clutches, four breaks and three overrunning clutchs.Three clutches are respectively (1) O/D clutch (C0), connect O/D planet row sun gear and planet carrier, during work, make the O/D planet row do the as a whole transmission of carrying out; (2) forward gear clutch (C1), connect jack shaft and rear planet row gear ring, during work, the jack shaft transmission of power arrived to rear planet row gear ring; (3) direct high/reverse clutch (C2), connect jack shaft and the public sun gear of front and back planet row, planet row sun gear before and after during work, power being delivered to by jack shaft.Four breaks are respectively (1) O/D break (B0), connect housing and O/D planet row sun gear, and work schedule moves O/D planet row sun gear, prevents that it is clockwise; (2) second gear coarst brake (B1), connect housing and front and back planet row sun gear, during work, planet row public sun gear braking in front and back prevented to the clockwise reverse of public sun gear; (3) second gear break (B2), connect housing and an overrunning clutch, during work, an overrunning clutch outer ring braked; (4) one/reverse gear brakes (B3), connect housing and rear planet carrier, during work, by rear planet row planet carrier braking, prevents its clockwise reverse.Three overrunning clutchs are respectively (1) O/D overrunning clutch (F0), prevent that the O/D sun gear from clockwise rotating; (2) overrunning clutchs (F1): before and after preventing, the public sun gear of planet row reverses; (3) No. two odd numbers clutches (F2): prevent that rear planet carrier from rotating counterclockwise.Detailed construction is referring to published product descritption and technical drawing.

Wherein: hydraulic control mainly comprises principal pressure modulating valve, aux. pressure modulating valve, throttler valve, SLU locking relay valve, M-hand control valve, reverse gear selector valve, solenoid valve and oil pump pipeline, with this, realizes that hydraulic control power transmission machinery structure carries out the gear adjustment.

Each executive component and electromagnetic valve work situation are:

One grade of D position, a solenoid valve energising, No. two solenoid valve outages, wherein solenoid valves, No. two solenoid valve is the normal close type switch valve, and operation element is O/D direct-drive clutch (C0), forward gear clutch (C1), No. 2 overrunning clutchs (F2), O/D shelves overrunning clutch (F0).

D position second gear, a solenoid valve energising, No. two solenoid valve energisings, operation element is O/D direct-drive clutch (C0), forward gear clutch (C1), second gear break (B2), No. 1 overrunning clutch (F1), O/D shelves overrunning clutch (F0).

D position third gear, a solenoid valve outage, No. two solenoid valve energisings, operation element is O/D direct-drive clutch (C0), forward gear clutch (C1), direct-drive clutch (C2), second gear break (B2), O/D shelves overrunning clutch (F0).

D position fourth gear: a solenoid valve outage, No. two solenoid valve outages, operation element is forward gear clutch (C1), direct-drive clutch (C2), hypervelocity (O/D) shelves break (B0), second gear break (B2).

Existing AT42QZC automatic transmission case planetary structure can provide 6 speed ratios, i.e. 6 gears, and its hydraulic control system can only realize 4 gears, one grade of speed ratio 2.452 wherein, second gear speed ratio 1.452, it is too large that centre differs, shifting comfort is relatively poor, and oil consumption is relatively high.

For the problems referred to above, like that the letter automatic transmission, except done change at oil circuit, has added again one group of planet row on the basis of original machinery, be used for changing speed ratio, mechanical structure is changed larger; The hydraulic pressure aspect realizes the control of oil circuit on former basis by adding a large amount of control valves, oil circuit and valve plate are changed large, and skidding easily occurs in 2 grades rise the process of 3 grades.

The model utility content

The purpose of this utility model is exactly on the basis of AT42QZC automatic transmission case 4 fast hydraulic systems, a kind of automatic transmission case four-speed five speed control mechanisms of upgrading are provided, with this, original hydraulic circuit is improved, add a gear between one grade and second gear, reach the purpose that 4 speed rise 5 speed, further improve the travelling comfort of gearshift, reduce oil consumption.

To add a gear effect best by each gear ratios of AT42QZC automatic transmission case being calculated, being established between original 1 grade and 2 grades for the utility model.Following technological scheme is proposed thus:

Automatic transmission case four-speed five speed control mechanisms of upgrading, comprise gearbox power transmission mechanism and hydraulic control, and wherein, power transmission machinery structure comprises input, output shaft and three planet rows, O/D planet row, front planet row and rear planet row; Executive component comprises three clutches, four breaks and three overrunning clutchs; Hydraulic control comprises principal pressure modulating valve, aux. pressure modulating valve, throttler valve, SLU locking relay valve, M-hand control valve, reverse gear selector valve, shift valve, solenoid valve and oil pump pipeline.Also comprise B0 control valve and B0 unloading control valve in hydraulic control; Described B0 unloading control valve is comprised of valve body, spool, valve pocket three parts, and wherein spool is comprised of upper, middle and lower three part guiding valves, and middle part is connected by middle springs with the bottom guiding valve, and valve body has five actuator ports and two and rushes down hydraulic fluid port; Described B0 control valve is comprised of valve body and spool two-part, and wherein spool is connected by middle springs by upper and lower two-part, and valve body has five actuator ports and a unloading port, a fixing port.

[0015]3-4 shift valve after improving in shift valve is comprised of valve body and spool two-part, wherein between spool top and valve body, is provided with spring, and valve body is provided with six actuator ports and two unloading ports altogether, two hydraulic fluid port connected electromagnetic valves wherein.

In such scheme, keep crude oil gearbox power transmission machinery structure division constant, B0 control valve and B0 unloading control valve have been increased in hydraulic control, control the pressurising of B2 break and the release of B0 break, after the B2 break reaches working pressure, the B0 brake pressure is laid down at once, the C0 clutch is opened, and realizes that 2 grades rise 3 grades; By adding a solenoid valve, independently control the commutation of the 3-4 shift valve after improvement, realize that the independent of B0 and C0 control, reach the purposes that 4 speed rise 5 speed.

Advantage of the present invention: (1) the present invention is on the basis of AT42Q4ZC automatic transmission case, keep mechanical structure constant, only its hydraulic circuit is changed, thereby only need be done change to valve body, just can realize that 4 speed rise the purpose of 5 speed, are easy to realize volume production on original production basis.(2) compared with prior art, hydraulic control system is changed still less.Through simulation and the examination of entrucking road, this 5 speed transmission is compared shifting comfort with 4 speed transmissions had raising to a certain degree, and oil consumption is corresponding minimizing also.Facts have proved that this hydraulic control system is practical.

The accompanying drawing explanation

Fig. 1 is 2 grades of hydraulic control figure after control mechanism of the present invention is applied in the AT42Q4ZC automatic transmission case;

Fig. 2 is 3 grades of hydraulic control figure after control mechanism of the present invention is applied in the AT42Q4ZC automatic transmission case;

Fig. 3 is the structural representation of B0 control valve;

Fig. 4 is the structural representation of B0 unloading control valve;

Fig. 5 is the structural representation of the 3-4 shift valve after improving;

The former oil circuit of Fig. 6 and spool transfer portion schematic diagram;

Fig. 7 improves latter 2 grades to rise 3 grades of control B0 release schematic diagram separately;

Fig. 8 improves latter 2 grades to rise 3 grades of control B2 pressurising schematic diagram separately;

2 grades of power transmission figure after Fig. 9 improves;

2 grades of main oil circuit schematic diagram after Figure 10 improves;

3 grades of power transmission figure after Figure 11 improves;

3 grades of main oil circuit schematic diagram after Figure 12 improves.

Embodiment

Below in conjunction with accompanying drawing, with regard to structure of the present utility model and concrete application, be described further.

The control mechanism of the present embodiment is keeping crude oil gearbox power transmission machinery structure division constant, B0 control valve and B0 unloading control valve have been increased in hydraulic control, control the pressurising of B2 break and the release of B0 break, after the B2 break reaches working pressure, the B0 brake pressure is laid down at once, the C0 clutch is opened, and realizes that 2 grades rise 3 grades; By adding a solenoid valve, independently control the commutation of the 3-4 shift valve after improvement, realize that the independent of B0 and C0 control, reach the purposes that 4 speed rise 5 speed.

With reference to Fig. 3, V is the B0 control valve, in figure: hydraulic fluid port V-0th, fixing port, hydraulic fluid port V-1st, be connected with 1 mouthful of reverse gear control valve (C2 oil pressure), and hydraulic fluid port V-2nd is connected with the hydraulic fluid port 5 of 3-4 shift valve (C0 oil pressure), hydraulic fluid port V-3rd, to hydraulic fluid port IV-1 mouthful, hydraulic fluid port V-4th, be connected with 2-3 shift valve hydraulic fluid port 6, and hydraulic fluid port V-5th is connected with 1-2 shift valve hydraulic fluid port 5 (B2 oil pressure), and V-A is plunger, V-B is upper valve core, and V-C is lower valve core.Annotate: not marking hydraulic fluid port in figure is drain tap.

The B0 control valve is comprised of valve body and spool two-part, and wherein spool is connected to form and is placed in valve body post in-core by middle springs by upper and lower two-part, and slides and be sealed and matched with valve body formation; Form three annular grooves between after upper valve core is connected successively by two plunger V-A and two guiding valve V-B, lower valve core forms annular groove between two guiding valve V-C connection is rear; Be arranged with fixing port V-0 and five an oil duct interface (abbreviation hydraulic fluid port) V-1, V-2, V-3, V-4, V-5 and a unloading port outside valve body post core; Wherein, fixing port V-0 and two interface V-1, V-2 are respectively between the annular groove between annular groove, lower plunger and the upper guiding valve between the upper lower plunger of corresponding and spool, upper lower valve core between spring region, circular groove between two guiding valves of the corresponding and lower valve core of two interface V-3 and V-4, unloading port and interface V-5 are located at two guiding valve corresponding parts of lower valve core.

Its Main Function is, the continuous rising along with the B2 oil pressure, move on spool, cuts off gradually the oil that flows to the B0 unloading control valve, B0 unloading control valve oil imported to fuel tank simultaneously, and the oil pressure that is about to B0 unloading control valve top is laid down.

With reference to Fig. 4, IV is the B0 unloading control valve, in figure: hydraulic fluid port IV-1 is from B0 control valve V-3 mouthful, and hydraulic fluid port IV-2nd, be connected with 9 mouthfuls, M valve, and hydraulic fluid port IV-3rd, to the B0 break, hydraulic fluid port IV-4th, be connected with the hydraulic fluid port 3 of 3-4 shift valve, hydraulic fluid port IV-5th, B0 feeds back oil pressure (being connected with IV-3 mouthful), and IV-A is spring, and IV-B is valve body, IV-C is valve pocket, and IV-D is spool.Annotate: not marking hydraulic fluid port in figure is drain tap.

The B0 unloading control valve is comprised of valve body, spool, valve pocket three parts, and wherein spool is comprised of upper, middle and lower three part guiding valves, and middle part is connected by middle springs with the bottom guiding valve, and valve body has five actuator ports and two and rushes down hydraulic fluid port.

Its Main Function is, the B0 unloading control valve improves the release speed of B0 by introducing main oil pressure, the feedback oil pressure of B2 by acting on the spool upper end and the feedback oil pressure that acts on the B0 of spool lower end are controlled B0 release speed, reach operating oil pressure to reach B2, the purpose that the B0 oil pressure is laid down at once.

With reference to Fig. 5,3-4 is the 3-4 shift valve, and 3-4-1 is 4# control port, and 3-4-3 is C0 clutch hydraulic fluid port, and 3-4-4 is main oil pressure, and 3-4-5 is the B0 brake oil.Annotate: not marking hydraulic fluid port in figure is drain tap.

3-4 shift valve after improvement is comprised of valve body and spool two-part, wherein between spool top and valve body, is provided with spring, and valve body is provided with six actuator ports and two unloading ports altogether, two hydraulic fluid port connected electromagnetic valves wherein.

See figures.1.and.2, control mechanism of the present invention is mainly by adding the B0 control valve, and B0 unloading control valve, 3-4 shift valve improve and a solenoid valve reaches the purpose that 4 speed rise 5 speed.Increase new gear between original 1-2 shelves,

form

2,3 new gears.　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

With reference to Fig. 6, former oil circuit and spool are changed.

By 5 mouthfuls of cut-outs of 1-2 shift valve, cut off the oil circuit that leads to the 3-4 shift valve, to realize the independent of 3-4 shift valve, control;

3 mouthfuls of the 3-4 shift valve executive components with 5 mouthfuls are exchanged, be about to 5 mouthfuls and lead to the B0 break, by 3 mouthfuls, lead to the C0 clutch;

The 3-4 shift valve is done to the change as Fig. 5; To flow to 1 mouthful of vent line of 3-4 gearshift and cut off by the 1-2 valve port 4 of shifting gears.　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

Five fast valve plate electromagnetic valve work situations after improvement:

One grade of D position: the energising of solenoid valve, No. two solenoid valve outages, No. four solenoid valve energisings, a solenoid valve wherein, No. two solenoid valves, No. four solenoid valve is the normal close type switch valve; Operation element is: O/D direct-drive clutch (C0); Forward gear clutch (C1); No. 2 overrunning clutchs (F2); O/D shelves overrunning clutch (F0).

D position second gear: a solenoid valve energising, No. two solenoid valve outages, No. four solenoid valve outages; Operation element is: O/D break (B0); Forward gear clutch (C1); No. 1 overrunning clutch (F1).

D position third gear: a solenoid valve energising, No. two solenoid valve energisings, No. four solenoid valve energisings; Operation element is: O/D direct-drive clutch (C0); Forward gear clutch (C1); Second gear break (B2); O/D shelves overrunning clutch (F0).

D position fourth gear: a solenoid valve outage, No. two solenoid valve energisings, No. four solenoid valve energisings; Operation element is: O/D direct-drive clutch (C0), forward gear clutch (C1); Direct-drive clutch (C2); Second gear break (B2), O/D shelves overrunning clutch (F0).

Five grades of D positions: a solenoid valve outage, No. two solenoid valve outages, No. four solenoid valve outages; Operation element is: O/D break (B0), forward gear clutch (C1); Direct-drive clutch (C2); Second gear break (B2).

Each gear B0 unloading control valve, B0 control valve working state:

1 grade: main oil pressure through V-4 by V-3 mouthful to IV-1 mouthful, set up oil pressure, IV-B0 unloading control valve spool is positioned at Fig. 4 position; V-B0 control valve V-2 mouthful is set up the C0 oil pressure simultaneously, and spool is positioned at Fig. 3 position.

2 grades: V-B0 control valve valve element position is constant, main oil pressure enter V-4 mouthful by V-3 mouthful to IV-1 mouthful, set up oil pressure, IV-B0 unloading control valve valve element position is constant, main oil pressure enters IV-4 mouthful and advances the B0 break through IV-3 mouthful, feeds back to IV-5 mouthful through the feedback hydraulic fluid port simultaneously, realizes that 1 grade rises 2 grades.

2 grades rise 3 grades of process control: 2 grades rise 3 grades, and B2 builds pressure gradually, and V-B0 control valve spool moves on gradually, cut off V-4 through V-3 to IV-1 mouthful oil circuit, IV-B0 unloading control valve spool moves on gradually, until spring compresses fully, now IV-3 mouthful with rush down hydraulic fluid port and communicate, lay down pressure in B0, along with B0 pressure reduces gradually, spring recovers former length gradually, B0 draining speed slowly slows down, thereby realizing synchronizeing of B2 pressurising and B0 draining, process is shown in Figure 10, Figure 11.

3 grades: V-2-with the 3-4-5 mouth, be connected (C0 oil pressure) make V-B0 control valve valve element position in Fig. 3 position; Main oil pressure through V-4 by V-3 mouthful to IV-1 mouthful, set up oil pressure and make IV-B0 unloading control valve spool be positioned at Fig. 3 position.

4 grades: V-2-with the 3-4-5 mouth, be connected (C0 oil pressure) simultaneously V-1-with 1 mouthful of reverse gear control valve, be connected (C2 oil pressure), make V-B0 control valve valve element position in Fig. 3 position; Main oil pressure through V-4 by V-3 mouthful to IV-1 mouthful, set up oil pressure and make IV-B0 unloading control valve spool be positioned at Fig. 4 position.

5 grades: V-2-with the 3-4-5 mouth, be connected (C0 oil pressure) simultaneously V-1-with 1 mouthful of reverse gear control valve, be connected (C2 oil pressure), make V-B0 control valve valve element position in Fig. 3 position; Main oil pressure through V-4 by V-3 mouthful to IV-1 mouthful, set up oil pressure and make IV-B0 unloading control valve spool be positioned at Fig. 4 position, main oil pressure enters IV-4 mouthful and advances the B0 break through IV-3 mouthful, feeds back to IV-5 mouthful through the feedback hydraulic fluid port simultaneously.

1 grade rises 2 grades of controls:

1 grade rises 2 grades, is exactly by controlling the commutation of 3-4 shift valve, the C0(O/D clutch) in oil lay down, simultaneously to the B0(O/D break) in pressurising, the output of O/D planetary mechanism speedup, thus reach the purpose of whole planetary mechanism raising speed.

2 grades rise 3 grades of controls:

2 grades rise 3 grades by controlling respectively separately the B0 release, and the B2 pressurising realizes, process is shown in Fig. 7 and Fig. 8

2 grades of power transmission figure, be shown in Fig. 9:

2 grades of main oil circuits are changed: 2 grades of groundwork elements are C1, B0, overrunning clutch F1, advancing C1 oil circuit and 1 grade of former four-speed, to advance the C1 oil circuit identical, and another oil circuit advances 2 mouthfuls of 3-4 shift valves, then solenoid valve is advanced on a road No. 4, No. 4 outage pressurizes, move on spool, and 3 mouthfuls of blissful 3-4 shift valves of another road binders flow to 4 mouthfuls, IV valve and flow to B0 through 3 mouthfuls, IV valve and flow to 5 mouthfuls, IV valve simultaneously and carry out feedback control, flow to 4 mouthfuls, V valve by 2 mouthfuls of 3-4 shift valves in addition and flow to 1 mouthful of IV through 3 mouthfuls, V valve, see Figure 10.

3 grades of power transmission, be shown in Figure 11.

3 grades of main oil circuits are changed: 3 grades of main executive components are C0, C1, and B2, advance C0, C1, the B2 oil circuit with former 2 grades identical, different is that the B2 oil pressure is caused to 5 mouthfuls, V valve, slowly cut off the oil circuit that is flowed to 1 mouthful, IV valve by 4 mouthfuls, V valve, the B0 release is synchronizeed with the B2 pressurising, see Figure 12.

Other gear is for newly adding the B0 control valve, the B0 unloading control valve, and oil circuit is without significant change.

6. key point of the present invention:

1) after B2 break oil pressure reaches operating oil pressure, the oil pressure of B0 break requires to lay down, thereby 7 mouthfuls of introducing main oil pressure times in order to improve B0 release speed and to control release of B0 unloading control valve at once.

2) 4 speed liter 5 fast rear transmission gear box work normalities are 5 grades, now B0 break work, thereby the solenoid valve of control 3-4 shift valve is open type.

3) upgrade after 5 speed, the 3-4 shift valve requires independent control, only by electromagnetic valve.

Above-described embodiment is on the basis of AT42Q4ZC automatic transmission case, keeps mechanical structure constant, only its hydraulic circuit is changed, thereby only need be done change to valve body, just can realize that 4 speed rise the purpose of 5 speed, and solve skidding.

Through simulation and the examination of entrucking road, this 5 speed transmission is compared shifting comfort with 4 speed transmissions had raising to a certain degree, and oil consumption is corresponding minimizing also.Facts have proved that this hydraulic control system is practical.

Speed ratio before and after improving changes the table of comparisons:

Claims

1. automatic transmission case four-speed five speed control mechanisms of upgrading, comprise gearbox power transmission mechanism and hydraulic control, and wherein, power transmission machinery structure comprises input, output shaft and three planet rows, O/D planet row, front planet row and rear planet row; Executive component comprises three clutches, four breaks and three overrunning clutchs; Hydraulic control comprises principal pressure modulating valve, aux. pressure modulating valve, throttler valve, SLU locking relay valve, M-hand control valve, reverse gear selector valve, shift valve, solenoid valve and oil pump pipeline, it is characterized in that also comprising B0 control valve and B0 unloading control valve in hydraulic control; Described B0 unloading control valve is comprised of valve body, spool, valve pocket three parts, and wherein spool is comprised of upper, middle and lower three part guiding valves, and middle part is connected by middle springs with the bottom guiding valve, and valve body has five actuator ports and two and rushes down hydraulic fluid port; Described B0 control valve is comprised of valve body and spool two-part, and wherein spool is connected by middle springs by upper and lower two-part, and valve body has five actuator ports and a unloading port, a fixing port.

2. above-mentioned automatic transmission case four-speed according to claim 1 five speed control mechanisms of upgrading, it is characterized in that: the 3-4 shift valve in shift valve is comprised of valve body and spool two-part, wherein between spool top and valve body, be provided with spring, valve body is provided with six actuator ports and two unloading ports altogether, and two hydraulic fluid ports wherein are connected with the solenoid valve of increase.