CN102103937A - Electric downshift switching device for vehicles - Google Patents
Electric downshift switching device for vehicles Download PDFInfo
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- CN102103937A CN102103937A CN2010105827934A CN201010582793A CN102103937A CN 102103937 A CN102103937 A CN 102103937A CN 2010105827934 A CN2010105827934 A CN 2010105827934A CN 201010582793 A CN201010582793 A CN 201010582793A CN 102103937 A CN102103937 A CN 102103937A
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- carriage
- switch housing
- casing cover
- push rod
- cylinder
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Abstract
The invention relates to an electric downshift switching device for vehicles. The operation sense of downshift is provided to a driver through swing angles of a pedal arm, so the operability can be improved, the fatigue feeling can be relieved, and the requirement on stability and economical efficiency can be met. The opening degree of the air throttle of a vehicle is adjusted by opening/closing an end part, so the downshift operation can be quickly completed.
Description
Technical field
The present invention relates to automotive electronics downshift switch device.
Background technology
Generally speaking, the speed-raising before automobile sails highway into or generally use when overtaking other vehicles lowers category, and the moment that lowers category, it is big that outputting torsion becomes, and can make automobile produce very big acceleration.The driver will speed up pedal and floors, and when air throttle was opened fully, after this automobile can be adjusted into gear low grade (automatic transmission) automatically, thereby produces acceleration fast, and manual is manually to turn down gear, makes automobile produce acceleration.
In addition, all automobiles all have the above-mentioned function that lowers category at present, and still, by accelerator pedal, the driver is difficult to feel the operation sense that lowers category.Therefore, this is actively developed R﹠D work all over the world.
Summary of the invention
For overcoming the problems referred to above of the prior art, the invention provides a kind of automotive electronics downshift switch device that can improve stability of automobile and economy.By this device, give the operation sense that the driver lowers category, not only improve operability, and alleviated sense of fatigue.
The present invention is by the following technical solutions: a kind of automotive electronics downshift switch device, comprise switch housing, casing cover, push rod, carriage, carriage spring, friction plate, extremity piece, and switch housing is a cylindrical shape, an opening and installing space is arranged; Casing cover Proximity switch shell aperture place inwall is fixed, and in switch housing inside, a plurality of footing and the kerve of casing cover intersect to form to circumferencial direction, and footing forms inclined plane along one of them direction in clockwise or the counter clockwise direction.Push rod is installed in switch housing inside, and its top ejects to the casing cover top, and it can move to the switch housing central axial direction, and the bottom is the mountain valley shape, connects continuously along circumferencial direction, has constituted working face.Carriage is installed in switch housing inside, and it can move to the switch housing centerline direction, also can rotate to circumferencial direction; Its top contacts with the working face of push rod, is provided with a plurality of tops pin at circumferencial direction by same intervals, and is meshed with the corresponding kerve of casing cover.In addition, the inclined plane gradient with pin inclined plane, the contacted carriage of push rod working face top and shell caping pin is identical.The carriage spring is installed in the inside of switch housing, and its end is supported by the bottom of switch housing; The other end is installed in the carriage spring groove, is supported by carriage.Friction plate is installed in the inside of carriage spring, and its end is fixed on the switch housing, and the other end contacts with carriage, and when carriage moved down, the carriage spring can be compressed, and was subjected to the pressure of this carriage, the direction indentation to the inside of the lug of friction plate.Extremity piece is installed in friction plate inside, and when the inside indentation of the lug of friction plate or when outwards recovering, this extremity piece is finished electric open and close operation, simultaneously, transmits the open and close signal to control unit of engine.
Compared with prior art, the present invention has the following advantages: the electronics downshift switch of the automobile among the present invention gives the operation sense that the driver lowers category by the pendulum angle of pedal arm, not only improves operability, and alleviated sense of fatigue, and stability and economy demand have been satisfied.In addition, adjust automobile air throttle open amount, thereby can finish the operation that lowers category fast by the extremity piece On/Off.
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Description of drawings
Fig. 1 is for being equipped with the structural representation at accelerator pedal of electronics downshift switch device on the pedal arm among the present invention;
Fig. 2 is the exploded view of electronics downshift switch device of the present invention;
Fig. 3 is the cutaway view of electronics downshift switch device of the present invention;
Fig. 4 is the front view of electronics downshift switch crust of the device lid of the present invention;
Fig. 5 is the front view of electronics downshift switch device push rod of the present invention;
Fig. 6 is the front view of electronics downshift switch device carriage of the present invention;
Fig. 7 is the upward view of electronics downshift switch device carriage of the present invention;
Fig. 8 is the schematic diagram of electronics downshift switch device friction plate of the present invention and extremity piece;
Fig. 9 is the preceding view of electronics downshift switch device push rod pressurization of the present invention;
Figure 10 is another preceding view of electronics downshift switch device push rod pressurization of the present invention
Figure 11 is the lower category view of maximum point of electronics downshift switch device of the present invention;
Figure 12 is lower category another view of maximum point of electronics downshift switch device of the present invention;
Figure 13 causes the operate condition schematic diagram of timing for electronics downshift switch device of the present invention.
Among the figure: 1, pedal arm shell; 1a, coverboard; 10, switch housing; 11, installing space; 12, hole clipping; 20, casing cover; 21, loam cake; 21a, push-rod hole; 22, cylinder; 22a, trip; 22b, footing; 22c, kerve; 22d, inclined plane; 23, fixing step; 3, pedal arm; 3a, pedal; 30, push rod; 31, small cylinder; 32, large cylinder; 32a, working face; 33, thrust step; 40, carriage; 41, carriage top pin; 41a, inclined plane; 42, pallet; 43, carriage spring groove; 44, carriage bottom outlet; 5, electronics downshift switch device; 50, carriage spring; 60, friction plate; 61, supporting surface; 62, stiff end; 63, lug; 70, extremity piece.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby more removes clear and definite defining so that advantages and features of the invention are easier to be it will be appreciated by those skilled in the art that protection scope of the present invention made.
Fig. 1 to Fig. 8 is the key diagram of electronics downshift switch device among the present invention.
As shown in the figure, in the present invention, electronics downshift switch device 5 is installed on the accelerator pedal device, and according to different demands, it can be installed on the pedal arm 3, also can be installed on the coverboard 1a.Situation about being installed on the pedal arm 3 with electronics downshift switch device 5 is that example is elaborated in the present invention.
Accelerator pedal device comprises that the pedal arm shell 1 and the end that are fixed on preceding coaming plate or the car bottom plate are fixed on the hinge of pedal arm shell 1 pedal arm 3 that the other end is connected with pedal 3a.
Decide the installation site of pedal arm shell according to the accelerator pedal type, when being hanging or organ type, before above-mentioned pedal arm shell 1 is installed on coaming plate or the car bottom plate as accelerator pedal.
In the present invention, the electronics downshift switch device that is installed on the pedal arm 3 comprises switch housing 10, casing cover 20, push rod 30, carriage 40, carriage spring 50 and friction plate 60.
The upper end of switch housing 10 is openings, and its installing space 11 inside are provided with a plurality of hole clippings 12, and hole clipping 12 can connect external member.
That is, casing cover 20 inwardly inserts towards switch housing 10 openends, and near switch housing 10 inwalls, is supported by inwall.Be provided with push-rod hole 21a in the middle of the loam cake 21 of casing cover 20, when casing cover 21 insertion switch housings 10 inside were supported by switch housing 10 tops, a plurality of trip 22a that form in casing cover 20 outsides just can insert in the corresponding hole clipping 12 of switch housing 10 outsides; The footing 22b and the kerve 22c of the casing cover 20 that intersects to form to circumferencial direction are positioned at switch housing 10 bottoms.
In addition, the loam cake 21 of casing cover 20 is provided with anti-detachment fixedly step 23 with cylinder 22 junctions.
After push rod 30 inserted switch housing 10 inside, its top ejected to casing cover 20 tops, can move to switch housing 10 central axial direction, and its push rod bottom is made up of the mountain valley shape, forms continuously along circumferencial direction, has constituted the working face of push rod 30.
That is, push rod 30 comprises: the small cylinder 31 that passes the push-rod hole 21a of casing cover 20 loam cakes 21 centres; Be positioned at cylinder 22 inside of casing cover 20, constitute one and extension downwards with small cylinder 31, and the large cylinder 32 that working face 32a forms continuously along circumferencial direction bottom it; And form the thrust step 33 that fits with fixing step 23 in small cylinder 31 and large cylinder 32 junctions.
Carriage 40 is installed on switch housing 10 inside, and it can move to switch housing 10 centerline directions, also can rotate to circumferencial direction.Carriage 40 tops contact with the working face 32a of push rod 30, and simultaneously, carriage 40 is provided with a plurality of carriages top pin 41 at circumferencial direction with same intervals, and is meshed with the corresponding kerve of casing cover 20; Identical with the gradient of the inclined plane 22d of the footing 22b of the inclined plane 41a of the contacted carriage of push rod 30 working face 32a top pin 41 and casing cover 20.
That is, disc pallet 42 can insert in the cylinder 22 of casing cover 20, and carriage top pin 41 uniformly-spaced evenly distributes at the circumferencial direction on pallet 42 tops, and the cross sectional shape of a plurality of carriages top pin 41 is " " font, protrudes at pallet 42 upper circumferential edge places to form; Protruding a plurality of carriages top pin 41 that forms on pallet 42 tops just can insert in the kerve 22c of casing cover 20; The top of all carriage top pin 41 all is inclined plane 41a, and inclined plane 41a contacts with the inclined plane 22d of casing cover 20 and the working face 32a of push rod 30.
The gradient of casing cover 20 footing inclined plane 22d is identical with the gradient of carriage 40 top pin inclined plane 41a, carriage 40 top pin inclined plane 41a contacts with the inclined plane 22d of casing cover 20 footing, and having under the situation of external force, guarantee carriage 40 to clockwise and one of them direction counterclockwise normally rotate.
In addition, be provided with coil component spring groove 43 with carriage spring 50 contacted pallets 42 bottoms, can mounting spring in spring groove 43; Spring groove 43 inboards have towards push rod direction diameter and diminish gradually, and the cross section is trapezoidal carriage bottom outlet 44.
Carriage spring 50 is installed in the inside of switch housing 10, and an end is supported by the bottom of switch housing 10; The other end is installed in the carriage spring groove 43, is supported by carriage 40.
That is, friction plate 60 comprises: be installed in carriage spring 50 inside, and be close to the supporting surface 61 of switch housing 10 bottoms; Extend downwards and form and be fixed on stiff end 62 on switch housing 10 bottoms from supporting surface 61; And the lug 63 that upwards divides the extension of two parts symmetry from supporting surface 61.When carriage 40 was mobile downward vertically, lug 63 was positioned at carriage bottom outlet 44 inside, indentation to the inside simultaneously.
When lug 63 inserts carriage bottom outlet 44, make it when the indentation of center, two extremity pieces 70 are in contact with one another, and on the contrary, when lug 63 disengaging carriage bottom outlets 44 recovered gradually, two extremity pieces 70 beginnings separated gradually.
Below further specify with reference to the accompanying drawings.
At first, Fig. 3, Fig. 9, Figure 10 are for not adding the state of foot-operated power, so pedal arm 3 is not swung.
At this moment, the lug 63 of friction plate 60 is not inserted into carriage bottom outlet 44 inside, and therefore, extremity piece 70 is separated states, just is in closed condition.
Add foot-operated power on pedal 3a, at this moment, by foot-operated power, pedal arm 3 rotates at pedal arm shell 1, and during the small cylinder 31 contact coverboard 1a of push rod 30, push rod 30 is under pressure, and moves to the installing space 11 of switch housing 10.
When push rod 30 moved to the installing space 11 of switch housing 10, carriage spring 50 was compressed, and simultaneously, the lug 63 of friction plate 60 inserts in carriage 40 bottom outlets 44.
Before inserting in carriage bottom outlet 44, lug 63 is separated states, when carriage 40 moves down, and when the lug 63 of friction plate 60 is inserted in the carriage bottom outlet 44, the indentation to the inside of lug 63 pressurizeds.
Therefore, lug 63 produces the reducing power towards outside direction in carriage bottom outlet 44, and passes to carriage 40.
When the reducing power that compression stress that carriage spring 50 produces and lug 63 produce was delivered to carriage 40, its resultant force passes to again on the pedal arm 3 by push rod 30, and was last, passes to the driver by pedal arm 3.Like this, the driver can feel the starting point that lowers category.
In addition, the lug 63 of friction plate 60 is inserted in the carriage bottom outlet 44, and lug 63 pressurizeds are to the center position indentation and when acquiring a certain degree, and extremity piece 70 is in contact with one another, and changes opening into.
When extremity piece 70 changed opening into, the signal that produce this moment transmitted to throttle position inductor (TPS) by control unit of engine, and the open amount of air throttle is strengthened rapidly.
Under above-mentioned state, the driver strengthens foot-operated dynamics, and when the pedal force that applies on pedal 3a was increased, the pendulum angle of pedal arm 3 can become greatly, and push rod 30 amount of movements of friction plate 60 directions can be strengthened.
As shown in figure 11, when push rod 30 is subjected to maximum pressure, when making amount of movement reach maximum, the carriage top pin 41 that is arranged in kerve 22c breaks away from from kerve 22c, carriage spring 50 compression (as shown in figure 12) amounts are maximum, and the lug 63 of friction plate 60 is inserted into the extreme higher position in the carriage bottom outlet 44.
At this moment, the pressure that compression stress that carriage spring 50 produces and lug 63 produce reaches maximum, and its resultant force is by passing to the driver by pedal arm 3.Like this, the driver can know the peak that lowers category.
As shown in figure 11, carriage 40 is subjected under the situation of maximum pressure by push rod 30, and when carriage top pin 41 broke away from from kerve 22c, the working face 32a of push rod 30 can produce the revolving force of (to the right) direction counterclockwise.Because push rod 30 can not be rotated to inclined plane 41a direction, and is maintained fixed state, so the inclined plane 41a of carriage 40 rotates to clockwise direction (left) along the push rod 30 working face 32a of same inclination.
Under state shown in Figure 11, when the inclined plane of carriage 40 41a along push rod 30 working face 32a when clockwise direction (left) rotates, the inclined plane 41a of carriage 40 continues to be rotated along the inclined plane 22d direction of casing cover 20 as shown in figure 13, and carriage 40 itself is to the clockwise direction rotation and move up.Therefore, by the action of carriage 40, the driver can experience the timing of the operation that lowers category.
In addition, when unclamping pedal, carriage 40 is subjected to the reducing power that carriage spring 50 and lug 63 apply, and moves to casing cover 20 directions, and thus, carriage top pin 41 is inserted in the next kerve 22c of casing cover 20 once more, prepares to lower category operation next time.
At this moment, the extremity piece 70 that is under the opening begins separately to change closed condition into, and the signal that produce this moment transmits to throttle position sensor (TPS) by control unit of engine, makes the open amount of air throttle return to former state.
In sum, the present invention has following advantage:
The present invention gives the operation sense that the driver lowers category, and has not only improved operability, and has alleviated sense of fatigue, and can satisfy stability and economy demand.
In addition, when the electronics downshift switch device among the present invention is worked,, can finish the operation that lowers category fast thus by the unlatching of extremity piece 70, the open amount that closing motion is controlled air throttle.
In electronics downshift switch device 5 of the present invention, switch housing 10 is fixed on the coverboard 1a of accelerator pedal, during pedal arm 3 swings, exerts pressure to push rod 30.
More than specific embodiment of the present invention is illustrated; but protection content of the present invention is not only limited to above embodiment; in the technical field, the common knowledge of a GPRS just can be carried out diversified change in its technology main idea scope under of the present invention.
Claims (11)
1. automotive electronics downshift switch device, it is characterized in that: it comprises switch housing (10), casing cover (20), push rod (30), carriage (40), carriage spring (50), friction plate (60) and extremity piece (70), described switch housing (10) is cylindrical, one end opening and have installing space (11), described casing cover (20) Proximity switch shell (10) openend inwall is fixed, being in the inner casing cover (20) of switch housing (10) has a plurality of footing (22b) and kerve (22c) to intersect to form to circumferencial direction, has the inclined plane (22d) that extends to form along clockwise or counterclockwise on the described footing (22b), described push rod (30) can be installed in the inside of switch housing (10) movably along the axis direction of switch housing (10), stretch out to the top of casing cover (20) on the top of described push rod (30), the bottom of described push rod (30) is the mountain valley shape and forms the working face (32a) that connects distribution continuously along circumferencial direction, described carriage (40) can move also along switch housing (10) centerline direction can along the circumferential direction be installed in switch housing (10) inside rotatably, the top of described carriage (40) contacts with the working face (32a) of push rod (30), described carriage (40) is gone up and is provided with a plurality of tops pin (41) at circumferencial direction with same intervals, described top pin (41) is meshed with the corresponding kerve (22c) of casing cover (20), identical with the gradient on the inclined plane (22d) at the base angle (22b) of the inclined plane (41a) of described push rod (30) working face (32a) contacted carriage top pin (41) and casing cover (20), described carriage spring (50) is installed in the inside of described switch housing (10), one end of described carriage spring (50) is supported by the bottom of switch housing (10), the other end of described carriage spring (50) is installed in the carriage spring groove (43) and by carriage (40) and supports, described friction plate (60) is installed in the inside of described carriage spring (50), one end of described friction plate (60) is fixed on the described switch housing (10), the other end contacts with described carriage (40), when described carriage (40) when moving down, described carriage spring (50) is compressed, be subjected to the pressure of this carriage (40), lug (63) indentation to the inside of described friction plate (60), described extremity piece (70) is installed in friction plate (60) inside, when the inwardly indentation or when outwards recovering, described extremity piece (70) is realized establishing by cable of the lug (63) of described friction plate (60), close and operate and open to the control unit of engine transmission, close signal.
2. automotive electronics downshift switch device according to claim 1, it is characterized in that: in described switch housing (10), be provided with more than one hole clipping (12) at least, in described casing cover (20), be provided with the trip (22a) that in described hole clipping (12), inserts.
3. automotive electronics downshift switch device according to claim 2, it is characterized in that: described casing cover (20) comprises loam cake (21), cylinder (22), fixing step (23), described loam cake (21) leans against the inwall of switch housing (10) opening part, is provided with push-rod hole (21a) in the middle of the described loam cake (21); The internal diameter of described cylinder (22) is greater than the diameter of described push-rod hole (21a), and in the formation of described loam cake (21) below, when described loam cake (21) bottom surface is attached to described switch housing (10) opening part outer wall upper surface, described cylinder (22) is installed in the installing space (11) of described switch housing (10), described cylinder (22) outside is provided with a plurality of trips (22a), and be provided with footing (22b) and the kerve (22c) that intersects to form to circumferencial direction at its bottommost, described loam cake (21) is provided with fixedly step (23) with the junction of cylinder (22).
4. automotive electronics downshift switch device according to claim 3, it is characterized in that: described push rod (30) comprises small cylinder (31), large cylinder (32), thrust step (33), described small cylinder (31) passes the push-rod hole (21a) in the middle of the loam cake (21), described large cylinder (32) is positioned at described casing cover (20) cylinder (22) inside, described large cylinder (32) bottom is the mountain valley shape, it connects continuously along circumferencial direction, constitute working face (32a)
Described thrust step (33) forms in described small cylinder (31) and large cylinder (32) junction, and fits with fixing step (23).
5. automotive electronics downshift switch device according to claim 3, it is characterized in that: disc pallet (42) inserts in the cylinder (22) of casing cover (20), described carriage top pin (41) is in the outside uniformly-spaced uniform distribution of circumferencial direction of pallet (42), a plurality of carriages top pin (41) protrudes at pallet (42) outer, circumferential edge place and forms, the cross sectional shape of described carriage top pin (41) is " " font, described a plurality of carriages top pin (41) insert in the kerve (22c) of described casing cover (20), the top of described carriage top pin (41) is inclined plane (41a), and described inclined plane (41a) contacts with the inclined plane (22d) of casing cover (20) and the working face (32a) of push rod (30).
6. automotive electronics downshift switch device according to claim 5, it is characterized in that: be provided with circular spring groove (43) with the contacted pallet of carriage spring (50) (42) bottom, the inboard central authorities of spring groove (43) have towards push rod (30) direction diameter and diminish gradually and the cross section is the carriage bottom outlet (44) of ladder-shaped.
7. automotive electronics downshift switch device according to claim 6, it is characterized in that: described friction plate (60) comprises supporting surface (61), stiff end (62), lug (63), be installed under the inner state of carriage spring (50) at described supporting surface (61), described supporting surface (61) is close on the supporting surface (61) of switch housing (10) bottom, described stiff end (62) is extended downwards and is formed by supporting surface (61), described stiff end (62) is fixed on switch housing (10) bottom, described lug (63) upwards divides two parts symmetry to extend from supporting surface (61), when described carriage (40) is mobile downward vertically, described lug (63) is positioned at described carriage bottom outlet (44) inside, and indentation to the inside.
8. automotive electronics downshift switch device according to claim 7, it is characterized in that: described extremity piece (70) directly inserts described friction plate (60) inside and connects, described switch housing (10) bottom is passed by the stiff end (62) of described friction plate (60) in described extremity piece (70) lower end, and described extremity piece (70) upper end symmetry is fixed on described lug (63) inboard.
9. automotive electronics downshift switch device according to claim 1 is characterized in that: the oblique angle on the inclined plane (41a) on the inclined plane (22d) on the described casing cover (20) and the described carriage (40) is identical.
10. automotive electronics downshift switch device according to claim 1, it is characterized in that: described switch housing (10) is fixed on the pedal arm (3) of accelerator pedal, when described pedal arm (3) was swung, described switch housing (10) contacted described push rod (30) and exerts pressure to it.
11. automotive electronics downshift switch device according to claim 1, it is characterized in that: described switch housing (10) is fixed on the coverboard (1a) of accelerator pedal, when described pedal arm (3) was swung, switch housing (10) was exerted pressure to described push rod (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010582793 CN102103937B (en) | 2010-12-10 | 2010-12-10 | Electric downshift switching device for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010582793 CN102103937B (en) | 2010-12-10 | 2010-12-10 | Electric downshift switching device for vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102103937A true CN102103937A (en) | 2011-06-22 |
| CN102103937B CN102103937B (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010582793 Active CN102103937B (en) | 2010-12-10 | 2010-12-10 | Electric downshift switching device for vehicles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958701A (en) * | 2021-11-08 | 2022-01-21 | 潍柴动力股份有限公司 | Downshift control method and device for vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09265859A (en) * | 1996-03-28 | 1997-10-07 | Niles Parts Co Ltd | Switch device |
| JP2007090985A (en) * | 2005-09-28 | 2007-04-12 | Denso Corp | Kick-down switch of accelerator device |
| US20090064816A1 (en) * | 2007-09-11 | 2009-03-12 | Donghee Industrial Co., Ltd. | Kick down switch of accelerator pedal apparatus |
| CN201511826U (en) * | 2010-02-11 | 2010-06-23 | 上海海拉电子有限公司 | Downshift switch |
| CN202011326U (en) * | 2010-12-10 | 2011-10-19 | 东熙汽车配件（张家港）有限公司 | Electronic downshift switching device for automobile |
-
2010
- 2010-12-10 CN CN 201010582793 patent/CN102103937B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09265859A (en) * | 1996-03-28 | 1997-10-07 | Niles Parts Co Ltd | Switch device |
| JP2007090985A (en) * | 2005-09-28 | 2007-04-12 | Denso Corp | Kick-down switch of accelerator device |
| US20090064816A1 (en) * | 2007-09-11 | 2009-03-12 | Donghee Industrial Co., Ltd. | Kick down switch of accelerator pedal apparatus |
| CN201511826U (en) * | 2010-02-11 | 2010-06-23 | 上海海拉电子有限公司 | Downshift switch |
| CN202011326U (en) * | 2010-12-10 | 2011-10-19 | 东熙汽车配件（张家港）有限公司 | Electronic downshift switching device for automobile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958701A (en) * | 2021-11-08 | 2022-01-21 | 潍柴动力股份有限公司 | Downshift control method and device for vehicle |
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| CN102103937B (en) | 2013-09-04 |
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