CN106337931A - Shifting fork control mechanism of double-clutch gearbox, gearbox and automobile - Google Patents
Shifting fork control mechanism of double-clutch gearbox, gearbox and automobile Download PDFInfo
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- CN106337931A CN106337931A CN201510397729.1A CN201510397729A CN106337931A CN 106337931 A CN106337931 A CN 106337931A CN 201510397729 A CN201510397729 A CN 201510397729A CN 106337931 A CN106337931 A CN 106337931A
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- Prior art keywords
- control
- valve
- fork
- shift fork
- executor
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Classifications
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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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4035—Control of circuit flow
-
- 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
- F16H2708/00—Control devices for speed-changing geared mechanisms, e.g. specially adapted couplings for synchronising devices, devices to simplify control, control of auxiliary gearboxes
- F16H2708/16—Control devices for speed-changing geared mechanisms, e.g. specially adapted couplings for synchronising devices, devices to simplify control, control of auxiliary gearboxes wherein the gearing is not described or not essential
- F16H2708/20—Control devices for speed-changing geared mechanisms, e.g. specially adapted couplings for synchronising devices, devices to simplify control, control of auxiliary gearboxes wherein the gearing is not described or not essential the control being hydraulic or pneumatic
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
- Control Of Transmission Device (AREA)
Abstract
A shifting fork control mechanism of a double-clutch gearbox, the gearbox and an automobile. The shifting fork control mechanism of the double-clutch gearbox comprises at least two shifting fork actuators, an actuator control valve, at least two gate control units and a pressure control valve, wherein the shifting fork actuators are suitable for controlling movement of a shifting fork rod to achieve rising and falling of the gear of the gearbox, the actuator control valve is coupled with the shifting fork actuators and suitable for controlling the movement direction and the movement speed of the shifting fork actuators, each gate control unit is coupled between the corresponding shifting fork actuator and the actuator control valve and suitable for controlling the corresponding shifting fork actuator and the actuator control valve to be connected or disconnected, and the pressure control valve is coupled between a main oil path of the double-clutch gearbox and an oil inlet of the actuator control valve and suitable for adjusting the input oil pressure of the shifting fork control mechanism. By the adoption of the shifting fork control mechanism of the double-clutch gearbox, the gearbox and the automobile, the speed gears of the double-clutch gearbox are expanded through simple control logic.
Description
Technical field
The present invention relates to field of automobile, the fork controls of more particularly, to a kind of pair of clutch gearbox
Mechanism, change speed gear box and automobile.
Background technology
Double clutch automatic speed changing case has two sets of drive mechanisms independent of each other, one of drive mechanism by
The odd number gear gear mesh composition of variator, another drive mechanism is then by the even number gear gear mesh in variator
Composition.This two drive mechanisms are connected with two clutches of setting on input shaft respectively.
Double clutch automatic speed changing case had both maintained that electric control mechanical type automatic speed variator structure is simple, transmission efficiency
High advantage, can not interrupt power by the cooperation control to two clutch separation and combination again
In the case of transmission ratio, therefore substantially reduce shift time and improve shift quality, make car load
There is excellent fuel economy and dynamic property.Carry the automobile of double-clutch type automatic gear shifting case, comprise
Multiple driving models, can meet the demand to different driving habits for the driver.
As a rule, gear number is more, and vehicle is better to the adaptability of different driving conditions, system
Efficiency is also higher, thus oil consumption is also less, obtains preferable economy.But existing automatic transmission
Gear number be usually 4-8, therefore at most can only realize 7 speed gear positions, the autgmentability of gear quantity is poor.
Content of the invention
The problem that the embodiment of the present invention solves is the double clutch speed-changing of extension how by simple control logic
The speed threshold of case.
For solving the above problems, the embodiment of the present invention provides the fork controls mechanism of a kind of pair of clutch gearbox,
Including:
At least two shift fork executors, are suitable to carry out change speed gear box gear lifting by controlling the movement of shifting fork bar;
Actuator control valves, are respectively coupled to described shift fork executor, are suitable to control described shift fork executor
The direction of motion and movement velocity;
At least two gating control cells;Each described gating control cells is respectively coupled to each described group
Between fork executor and described actuator control valves, it is suitable to control each described shift fork executor and each institute
State the break-make between actuator control valves;
Pressure-control valve, is coupled to the working connection of described pair of clutch gearbox and described actuator control valves
Between oil-in, it is suitable to adjust the input oil pressure of described fork controls mechanism.
Optionally, described gating control cells include:
At least two connection subelements;Each described connection subelement is respectively coupled to each described shift fork and holds
Between row device and described actuator control valves, it is adapted to turn on or disconnects described actuator control valves and each institute
State the connection of shift fork executor;
Conducting controls subelement, is suitable to control the described control subelement that connects to move to and described executor control
The communicating position of valve processed or open position.
Optionally, described connection subelement is connection control valve.
Optionally, described connection control valve is guiding valve.
Optionally, described conducting controls subelement is conducting control valve.
Optionally, described conducting control valve is switch electromagnetic valve.
Optionally, described actuator control valves are flow solenoid valve.
Optionally, described pressure-control valve is ratio pressure electromagnetic valve.
In order to solve above-mentioned technical problem, the embodiment of the invention also discloses a kind of change speed gear box, including on
The fork controls mechanism of the double clutch gearboxes stated.
In order to solve above-mentioned technical problem, the embodiment of the invention also discloses a kind of automobile, its feature exists
In including above-mentioned change speed gear box.
Compared with prior art, the technical scheme of the embodiment of the present invention has the advantage that
Gating control cells are set between shift fork executor and actuator control valves, wherein each gating control
Unit processed is corresponded with each described shift fork executor, therefore can according to the needs of the actual control of system,
Gate corresponding shift fork actuator, realize the independent control to shift fork executor each described, its control
Logic is very simple.So it is single by arranging multigroup so one-to-one shift fork executor and gating control
Unit, double clutch gearboxes can be according to the needs of application, the speed threshold of the double clutch gearbox of extension.
Further, from switch electromagnetic valve as the conducting control valve in described gating control cells, permissible
Efficiently control manufacturing cost.
Brief description
Fig. 1 is the structural representation of the fork controls mechanism of existing a kind of pair of clutch gearbox;
Fig. 2 is the structural representation of the fork controls mechanism of a kind of pair of clutch gearbox in the embodiment of the present invention;
Fig. 3 is the control voltage of flow solenoid valve and the hydraulic pressure flowing through flow solenoid valve in the embodiment of the present invention
The discharge relation of oil;
Fig. 4 is a kind of structural representation of flow solenoid valve in the embodiment of the present invention.
Specific embodiment
Double clutch automatic speed changing case has the advantages that structure is simple, transmission efficiency, and can pass through right
The cooperation of two clutch separation and combination controls, transmission ratio in the case of not interrupting power, because
This substantially reduces shift time and improves shift quality, make car load have excellent fuel economy and
Dynamic property.Carry the automobile of double-clutch type automatic gear shifting case, comprise multiple driving models, can meet
The demand to different driving habits for the driver.As a rule, gear number is more, and vehicle is to different travelings
The adaptability of condition is better, and system effectiveness is also higher, thus oil consumption is also less, obtains preferable economy
Property.But the gear number of existing automatic transmission is usually 4-8, therefore at most can only realize 7 speed gear
Position, the autgmentability of gear quantity is poor.
Fig. 1 is the fork controls mechanism of existing a kind of pair of clutch gearbox.As shown in figure 1, described group
Fork controlling organization include two logical valves 101, logical valve 102 and 4 shift fork executors 106,107,
108 and 109, thus realizing 8 speed gear positions.It realizes principle, by described logical valve 101 and logic
Valve 102 difference spool control valve 103 and the shift position of guiding valve 104, thus realize flow solenoid valve 105
Break-make and shift fork executor 106,107,108 and 109 between.Due to described logical valve 101 He
Logical valve 102 is output as 0 or 1, therefore at most can only be realized as Fig. 1 institute by described two logical valves
The control to four shift fork executors shown.Realize the control of more gears if necessary, then be accomplished by
Two or more fork controls mechanism as shown in Figure 1 is set, and now the quantity of logical valve will accordingly increase.
Due to needing all of logical valve to be controlled simultaneously, therefore its control logic can be extremely complex.It can be seen that,
More speed thresholds are difficult to by fork controls mechanism as shown in Figure 1.
The embodiment of the present invention is provided with gating control cells between shift fork executor and actuator control valves,
Wherein each gating control cells and each described shift fork executor correspond, therefore can be according to system
The actual needs controlling, gate corresponding shift fork actuator, realize to shift fork executor each described
Independent control.By arranging multigroup so one-to-one shift fork executor and gating control cells, double from
Closing change speed gear box can be according to the needs of application, the speed threshold of the double clutch gearbox of extension.
Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings
The specific embodiment of the present invention is described in detail.
The embodiment of the invention discloses the fork controls mechanism of a kind of pair of clutch gearbox.As shown in Fig. 2
The fork controls mechanism of described pair of clutch gearbox can include 6 shift fork executor 201-206, is suitable to lead to
Cross the lifting controlling the movement of shifting fork bar to carry out change speed gear box gear.Each described shift fork executor 201-206
All include two oil pockets.For example, shift fork executor 201 includes oil pocket 201a and 201b.
In being embodied as, described in fork controls mechanism as shown in Figure 2, the number of shift fork executor sets
It is set to 6, to realize 12 speed stages, at most can realize 11 forward range and one
The control of gear.
It is understood that the number of shift fork executor is set to 6 only in the embodiment of the present invention
It is a kind of example to facilitate explanation.According to the needs in practical application, the shift fork of other quantity can be set
Executor, such as more than 6 shift fork executors, it belongs in protection scope of the present invention.
The fork controls mechanism of described pair of clutch gearbox can also include actuator control valves 207, respectively coupling
It is connected to described shift fork executor 201-206, be suitable to control the direction of motion of described shift fork executor 201-206
And movement velocity.
In being embodied as, described actuator control valves 207 can be a kind of flow solenoid valve.In order to say
For the sake of bright convenience, hereafter above-mentioned actuator control valves 207 are replaced with flow solenoid valve 207.
In above-mentioned being embodied as, tie as described actuator control valves 207 as from flow solenoid valve
Close shown in Fig. 3 and Fig. 4, when its control electric current changes between 0v-0.5v, hydraulic oil is by described stream
Air inlet (liquid) the mouth p flow direction commutation mouth a of amount electromagnetic valve, flows through the hydraulic fluid flow rate size of commutation mouth a
It is scaled with the size of current shown in Fig. 3.When the control electric current of described flow solenoid valve exists
When changing between 0.5v-1v, hydraulic oil is by air inlet (liquid) the mouth p flow direction commutation mouth of described flow solenoid valve
B, the uninterrupted of commutation mouth b is scaled with size of current.The uninterrupted of hydraulic oil determines
The translational speed of described shift fork executor 201-206, the direction of flow, that is, from described air inlet (liquid) mouth p
Determine described shift fork executor 201-206 to commutation mouth a or described air inlet (liquid) mouth p to commutation mouth b
To left movement or move right.
As shown in Fig. 2 the fork controls mechanism of described pair of clutch gearbox can also include pressure-control valve
208, it is coupled to the working connection 209 of described pair of clutch gearbox and entering of described actuator control valves 207
Between hydraulic fluid port, it is suitable to adjust the input oil pressure being flowed into described fork controls mechanism by described working connection 209,
The hydraulic oil pressure of inflow is made to be maintained in stable working range.
In being embodied as, described pressure-control valve can be a kind of proportional pressure control valve.
The fork controls mechanism of described pair of clutch gearbox can also include at least two gating control cells,
Its quantity is corresponding with the quantity of described shift fork executor, and each described gating control cells is respectively coupled to
Between each described shift fork executor 201-206 and described actuator control valves 207, it is suitable to control each institute
State the break-make between shift fork executor 201-206 and each described actuator control valves 207.
In being embodied as, as shown in Fig. 2 described gating control cells can include at least two connections
Subelement 210-215 and conducting control subelement 216-221.Each described connection subelement 210-215 divides
It is not coupled between each described shift fork executor 201-206 and described actuator control valves 207, be suitable to lead
On-off opens the connection of described actuator control valves 207 and each described shift fork executor 201-206.Described
Conducting control subelement 216-221 be suitable to control described connection subelement 210-215 mobile extremely with described execution
The communicating position of device control valve 207 or open position.
In above-mentioned being embodied as, described connection subelement 210-215 can be the connection control of valve mechanism
Valve processed, more particularly, described connection control valve can be a kind of guiding valve.For convenience,
Hereafter above-mentioned connection subelement 210-215 is replaced with guiding valve 210-215.
In above-mentioned being embodied as, it can also be valve mechanism that described conducting controls subelement 216-221
Conducting control valve.More particularly, for the purpose of cost control, described conducting control valve can be selected
Relatively inexpensive switch electromagnetic valve.For convenience, hereafter replaced with switch electromagnetic valve 216-221
Above-mentioned conducting controls subelement 216-221.
The guiding valve 210-215 that its correspondence couples can be controlled to move to by described switch electromagnetic valve 216-221
With communicating position or the open position of described flow solenoid valve 207 so that coupling described guiding valve 210-215
The oil pocket of shift fork executor 201-206 corresponding with described flow solenoid valve 207 connection or disconnect.
In conjunction with shown in Fig. 2, Fig. 4 and following table table 1, when described taking described switch electromagnetic valve 216 as a example
When the control electric current order of switch electromagnetic valve 216 is 1, couple the guiding valve 210 of described switch electromagnetic valve 216
Promoted by hydraulic oil, slide into communicating position, now the shift fork executor 201 of shift fork 1, its left end oil pocket
201a is connected with two commutations mouth a, b of described flow solenoid valve 207 respectively with right-hand member oil pocket 201b.
When described guiding valve 210 is in connected state with described flow solenoid valve 207, by controlling other switches
The control electric current order of electromagnetic valve 217-221 is 0 so as to his guiding valve 217-221 and described flow solenoid valve
207 are off.Meanwhile, the control electric current by controlling described flow solenoid valve 207 is 1 or 0,
Hydraulic oil can be controlled to enter 201a oil pocket or 201b oil pocket.
As can be seen here, when needing to carry out the switching of shift fork executor, with realize gear lifting control when,
The embodiment of the present invention only need to will need switching shift fork executor corresponding to switch electromagnetic valve control electricity
Crush-cutting is changed to 1, and realizes the selection in direction by the control voltage controlling flow solenoid valve.Working as
Under front controlled state, at most only need to change three control voltages, you can reach the purpose of above-mentioned gear switch,
Therefore its logic is very simple.Therefore the embodiment of the present invention can extend double according to actually used needs
The speed threshold of clutch gearbox, without the control logic that setting is complicated.
216 | 221 | 218 | 219 | 220 | 217 | 207 | 208 | |
201a | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
201b | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
202a | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
202b | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 |
203a | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
203b | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 |
204a | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
204b | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 |
205a | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 |
205b | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 |
26a | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
206b | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
Table 1
By opening pressure-control valve 208, and control the current order of described flow solenoid valve 207, permissible
Control the translational speed of shift fork executor 201-206 and the direction of described shift fork 1.
For example, in conjunction with shown in Fig. 1 to Fig. 4, when the control electric current of described flow solenoid valve 207 is in 0v-0.5v
Between when changing it is believed that being now 0v to the control electric current order of described flow solenoid valve 207;When described
When the control electric current of flow solenoid valve 207 changes between 0.5v-1v it is believed that now to described flow electricity
The control electric current order of magnet valve 207 is 1v.
When the control electric current order of described switch electromagnetic valve 216 is 1, guiding valve 210 mobile to described
The communicating position of flow solenoid valve 13.Now, if the control electric current order of described flow solenoid valve 207
It is judged to 0, then hydraulic oil passes through, by air inlet (liquid) the mouth p of described flow solenoid valve 207, the mouth a that commutates,
Flow in the 201a oil pocket of described shift fork executor 201, so that described shift fork 1 is moved right.The shifting of shift fork
, according to the flow of hydraulic oil, that is, the control electric current size of described flow solenoid valve 207 is true in proportion for dynamic speed
Fixed.
If the control electric current order of described flow solenoid valve 207 is judged to 1, hydraulic oil is by described flow
Air inlet (liquid) the mouth p of electromagnetic valve 207 passes through the mouth b that commutates, and flows to the 201b of described shift fork executor 201
In oil pocket, shift fork is made to be moved to the left.The translational speed of described shift fork is according to the flow of hydraulic oil, that is, described
The control electric current size of flow solenoid valve 207 proportionally determines.
It is understood that the control principle of other shift forks executor's 202-206 moving direction and translational speed
Identical with above-mentioned embodiment, therefore no longer repeat one by one herein.
The embodiment of the invention also discloses a kind of change speed gear box, dialling including above-described pair of clutch gearbox
Fork controlling organization.
The embodiment of the invention also discloses a kind of automobile, including above-described change speed gear box.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art,
Without departing from the spirit and scope of the present invention, all can make various changes or modifications, therefore the guarantor of the present invention
Shield scope should be defined by claim limited range.
Claims (10)
1. the fork controls mechanism of a kind of pair of clutch gearbox is it is characterised in that include:
At least two shift fork executors, are suitable to carry out change speed gear box gear lifting by controlling the movement of shifting fork bar;
Actuator control valves, are respectively coupled to described shift fork executor, are suitable to control described shift fork executor's
The direction of motion and movement velocity;
At least two gating control cells;Each described gating control cells is respectively coupled to each described shift fork
Between executor and described actuator control valves, it is suitable to control each described shift fork executor and each institute
State the break-make between actuator control valves;
Pressure-control valve, is coupled to the working connection of described pair of clutch gearbox and entering of described actuator control valves
Between hydraulic fluid port, it is suitable to adjust the input oil pressure of described fork controls mechanism.
2. as claimed in claim 1 the fork controls mechanism of double clutch gearboxes it is characterised in that described choosing
Logical control unit includes:
At least two connection subelements;Each described connection subelement is respectively coupled to each described shift fork execution
Between device and described actuator control valves, it is adapted to turn on or disconnects described actuator control valves and each institute
State the connection of shift fork executor;
Conducting controls subelement, is suitable to control the described control subelement that connects to move to and described executor control
The communicating position of valve or open position.
3. as claimed in claim 2 the fork controls mechanism of double clutch gearboxes it is characterised in that described company
Logical subelement is connection control valve.
4. as claimed in claim 3 the fork controls mechanism of double clutch gearboxes it is characterised in that described company
Logical control valve is guiding valve.
5. as claimed in claim 2 the fork controls mechanism of double clutch gearboxes it is characterised in that described lead
Logical control subelement is conducting control valve.
6. as claimed in claim 5 the fork controls mechanism of double clutch gearboxes it is characterised in that described lead
Logical control valve is switch electromagnetic valve.
7. as claimed in claim 1 the fork controls mechanism of double clutch gearboxes it is characterised in that described hold
Row device control valve is flow solenoid valve.
8. as claimed in claim 1 the fork controls mechanism of double clutch gearboxes it is characterised in that described pressure
Force control valve is ratio pressure electromagnetic valve.
9. a kind of change speed gear box is it is characterised in that include the double clutch speed-changings as described in any one of claim 1-8
The fork controls mechanism of case.
10. a kind of automobile is it is characterised in that include change speed gear box as claimed in claim 9.
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CN201510397729.1A CN106337931A (en) | 2015-07-08 | 2015-07-08 | Shifting fork control mechanism of double-clutch gearbox, gearbox and automobile |
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CN201510397729.1A CN106337931A (en) | 2015-07-08 | 2015-07-08 | Shifting fork control mechanism of double-clutch gearbox, gearbox and automobile |
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CN201510397729.1A Pending CN106337931A (en) | 2015-07-08 | 2015-07-08 | Shifting fork control mechanism of double-clutch gearbox, gearbox and automobile |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107588189A (en) * | 2016-07-08 | 2018-01-16 | 广州汽车集团股份有限公司 | The hydraulic gear-shifting control system of double-clutch automatic gearbox |
CN109578578A (en) * | 2017-09-29 | 2019-04-05 | 比亚迪股份有限公司 | Oil piping system without clutch gearbox and without clutch gearbox |
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US5240093A (en) * | 1991-05-30 | 1993-08-31 | Mercedes-Benz Ag | Configuration for the pressure supply to an automatic selector device of a change-speed gearbox |
US20060046897A1 (en) * | 2004-09-02 | 2006-03-02 | Getrag Ford Transmissions Gmbh | Hydraulic control apparatus for an automatic dual clutch transmission |
CN102292574A (en) * | 2009-01-23 | 2011-12-21 | 戴姆勒股份公司 | Control device for an automated geared transmission |
CN102292575A (en) * | 2009-01-23 | 2011-12-21 | 戴姆勒股份公司 | Control device for an automated geared transmission |
CN204300338U (en) * | 2014-11-18 | 2015-04-29 | 盛瑞传动股份有限公司 | Automatic catch gearbox and enter safety go home gear impact relieving apparatus |
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2015
- 2015-07-08 CN CN201510397729.1A patent/CN106337931A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US5240093A (en) * | 1991-05-30 | 1993-08-31 | Mercedes-Benz Ag | Configuration for the pressure supply to an automatic selector device of a change-speed gearbox |
US20060046897A1 (en) * | 2004-09-02 | 2006-03-02 | Getrag Ford Transmissions Gmbh | Hydraulic control apparatus for an automatic dual clutch transmission |
CN102292574A (en) * | 2009-01-23 | 2011-12-21 | 戴姆勒股份公司 | Control device for an automated geared transmission |
CN102292575A (en) * | 2009-01-23 | 2011-12-21 | 戴姆勒股份公司 | Control device for an automated geared transmission |
CN204300338U (en) * | 2014-11-18 | 2015-04-29 | 盛瑞传动股份有限公司 | Automatic catch gearbox and enter safety go home gear impact relieving apparatus |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107588189A (en) * | 2016-07-08 | 2018-01-16 | 广州汽车集团股份有限公司 | The hydraulic gear-shifting control system of double-clutch automatic gearbox |
CN107588189B (en) * | 2016-07-08 | 2023-03-10 | 广州汽车集团股份有限公司 | Hydraulic gear shifting control system of double-clutch automatic transmission |
CN109578578A (en) * | 2017-09-29 | 2019-04-05 | 比亚迪股份有限公司 | Oil piping system without clutch gearbox and without clutch gearbox |
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