CN108019508A - Inserted before band with power takeoff and divide transmission gear error prevention device and its control method - Google Patents
Inserted before band with power takeoff and divide transmission gear error prevention device and its control method Download PDFInfo
- Publication number
- CN108019508A CN108019508A CN201810042665.7A CN201810042665A CN108019508A CN 108019508 A CN108019508 A CN 108019508A CN 201810042665 A CN201810042665 A CN 201810042665A CN 108019508 A CN108019508 A CN 108019508A
- Authority
- CN
- China
- Prior art keywords
- gear
- power takeoff
- power
- control unit
- electronic control
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- 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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
-
- 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
- F16H61/02—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 characterised by the signals used
- F16H61/0202—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 characterised by the signals used the signals being electric
- F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
-
- 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
- F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
-
- 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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1208—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures with diagnostic check cycles; Monitoring of failures
- F16H2061/1216—Display or indication of detected failures
-
- 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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/124—Limiting the input power, torque or speed
-
- 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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1256—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected
- F16H2061/1272—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected the failing part is a part of the final output mechanism, e.g. shift rods or forks
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses inserting to divide transmission gear error prevention device and its control method before a kind of band with power takeoff, described device includes instrument electronic control unit, inserts a point gear cylinder, pressure signal switch, power take-off valve, power takeoff cylinder, power takeoff solenoid valve and the gentle pipe of related harness；Pressure signal is switched to be fitted together with inserting a point gear cylinder, and pressure signal switch is connect by rigid line gives instrument electronic control unit；Power take-off valve is connected with instrument electronic control unit, and instrument electronic control unit is connected with power takeoff solenoid valve to control the power on/off of power takeoff solenoid valve, the intake and exhaust of power takeoff solenoid valve control power takeoff cylinder.Invention increases insert a point gear pressure signal switch, it is ensured that speed changer inserts point gear in correct gear when power takeoff works, and avoids the slotting abrasion for dividing gear synchronizer；Point gear is inserted in correct gear when inserting increasing and divide gear cylinder pressure signal to switch and ensure power takeoff work by way of the control logic of change activation power takeoff solenoid valve in instrument program.
Description
Technical field
The present invention relates to the gear error prevention device and its control method of a kind of power takeoff of heavy-duty transmission, belong to automatically controlled neck
Domain.
Background technology
Country's heavy truck is much equipped with double jackshaft bands and inserts a point speed changer for gear at present, and the type speed changer is using speed change
During device countershaft power takeoff power taking, speed changer is not allowed to insert a point gear rear gear engagement passing power, if rear gear engages, power taking
Two jackshaft unbalance stress of speed changer can divide gear synchronizer to cause heavy wear to inserting when device works.Only by being carried out to driver
Training on operation can not fundamentally ensure to insert point gear during power takeoff work in correct position.
The content of the invention
The technical problems to be solved by the invention are in view of the defects existing in the prior art, there is provided a kind of to divide speed change with preceding insert
Device gear error prevention device and its control method.
To solve this technical problem, the present invention provides insert to divide transmission gear anti-misloading before a kind of band with power takeoff
Put, including including instrument electronic control unit, slotting point of gear cylinder, pressure signal switch, power take-off valve, power takeoff cylinder, a power takeoff
Solenoid valve and the gentle pipe of related harness；The pressure signal switch is fitted together with inserting a point gear cylinder, and pressure signal switch passes through
Rigid line, which connects, gives instrument electronic control unit；Power take-off valve is connected with instrument electronic control unit, instrument electronic control unit and power takeoff solenoid valve
Connect to control the power on/off of power takeoff solenoid valve, the intake and exhaust of power takeoff solenoid valve control power takeoff cylinder.
The electronic control unit is equipped with power takeoff control module, and power takeoff control module judges whether to drive according to coherent signal
Power takeoff solenoid valve.
Divide transmission gear mistake-proof control method, including following step present invention also offers slotting before a kind of band with power takeoff
Suddenly：
1) when hanging power takeoff, shift signal is neutral gear first, and let slip the clutch, presses power take-off valve；
2) after pressing power take-off valve, instrument electronic control unit judges whether clutch pedal is stepped on, whether speed changer is in sky
Whether gear, the pressure signal switching signal inserted on point gear cylinder meet condition：
A, instrument electronic control unit judges that pressure switch signal meets condition, is moved if inserting divide the front-seat gear engagement of gear to transmit at this time
Power, instrument electronic control unit send the instruction of power takeoff solenoid valves, the ventilation of power takeoff cylinder, and power takeoff is put into gear work；
B, instrument electronic control unit judges that pressure signal switching signal is unsatisfactory for condition, inserts a point gear rear gear engagement at this time and passes
Graduating power, instrument electronic control unit will not drive power takeoff solenoid valve, and power takeoff can not be linked into, while instrument electronic control unit prompting department
Machine " inserting a point gear positional fault " is simultaneously prompted with buzzing；
If C, power takeoff has been in normal operating conditions, at this time switching insert divide gear put i.e. insert point gear nibbled by front-seat gear
Switching is closed when rear gear engages, instrument electronic control unit judges to insert according to the change of pressure signal switching signal divides gear to put mistake
By mistake, power takeoff solenoid valve is cut off, power takeoff is stopped, while instrument prompting " inserts a point gear positional fault, power takeoff stops work
Make " and prompted with buzzing.
Beneficial effect：Invention increases a point gear pressure signal switch is inserted, instrument electronic control unit is according to pressure switch signal
Judging to insert divides gear to put, it is ensured that speed changer inserts point gear in correct gear when power takeoff works, and effectively prevent and inserts point gear synchronously
The abrasion of device；Point gear cylinder pressure signal switch and the change activation power takeoff solenoid valve in instrument program are inserted by increasing
The mode of control logic ensures to insert point gear during power takeoff work in correct gear.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is control flow chart of the present invention.
In figure：1 speed changer, 2 insert point front-seat gears of gear, 3 insert and divide gear synchronizer, 4 insert a point gear rear gears, 5 insert a point gear gas
Cylinder, 6 pressure signals switch, 7 power takeoffs, 8 power takeoff cylinders, 9 tracheaes, 10 vehicle sources of the gas, 11 power takeoff solenoid valves, 12 instrument electricity
Control unit, 13 power take-off valves, 14 shift signals, 15 clutch pedals.
Embodiment
The present invention is specifically described with reference to the accompanying drawings and embodiments.
Fig. 1 show the structure diagram of the present invention.
The present invention inserts before the band with power takeoff divides transmission gear error prevention device, including including instrument electronic control unit 12, insert
Divide gear cylinder 5, pressure signal switch 6, power take-off valve 13, power takeoff cylinder 8, power takeoff solenoid valve 11 and related harness gentle
Pipe 9.
The instrument electronic control unit 12 is equipped with single power takeoff control module, and the input signal of power takeoff control module has
Power take-off valve signal, clutch pedal signal, speed changer neutral signal and a slotting point of gear pressure switch signal, export signal
For power takeoff solenoid-driven signal.After power takeoff control module receives power take-off valve signal, to clutch pedal signal,
Speed changer neutral signal and a slotting point of gear pressure switch signal carry out a logic judgment, not defeated if having a signal to be unsatisfactory for condition
Go out the drive signal of solenoid valve, power takeoff solenoid valve no power, the output taking device solenoid valve if all signals meet condition
Drive signal, power takeoff solenoid valves.
Mounted in inserting on point gear cylinder 5, pressure signal switch 6 is connect automatically controlled to instrument the pressure signal switch 6 by rigid line
Unit 12, a point gear information for gear is inserted to detect.
The power take-off valve 13 is connected with instrument electronic control unit 12, and instrument electronic control unit 12 connects with power takeoff solenoid valve 11
Connect, to control the power on/off of power takeoff solenoid valve 11, power takeoff solenoid valve 11 is connected with vehicle source of the gas 10, power takeoff solenoid valve 11
Control the intake and exhaust of power takeoff cylinder 8, inserted when effectively avoiding power takeoff from working point keep off gear mistake and caused by transmission failure.
Fig. 2 show control flow chart of the present invention.
Gear mistake-proof control method of the present invention, includes the following steps：
1) when hanging power takeoff, transmission gear signal 14 is neutral gear first, and let slip the clutch 15, presses power takeoff and open
Close 13；
2) after pressing power take-off valve 13, instrument electronic control unit 12 judges 15 signal of clutch pedal, 1 neutral gear of speed changer letter
Number, insert point gear cylinder 5 on a pressure signal switch 6 signals whether meet condition：
A, instrument electronic control unit 12 judges that pressure signal switchs 6 signals and meets condition, inserts the front-seat gear 2 of point gear at this time with inserting
Stepper synchronizer 2 engages passing power, and instrument electronic control unit 12 sends 11 electrical instruction of power takeoff solenoid valve, power takeoff cylinder
8 ventilations, power takeoff 7 are put into gear work；
B, instrument electronic control unit 12 judge pressure signal switch 6 signals be unsatisfactory for condition, at this time insert point gear rear gear 4 with
Insert and divide gear synchronizer 2 to engage passing power, instrument electronic control unit 12 will not drive power takeoff solenoid valve 11, and power takeoff 7 can not be hung
Enter, while instrument electronic control unit 12 is prompted driver's " inserting a point gear positional fault " and prompted with buzzing；
If C, power takeoff 7 has been in normal operating conditions, at this time switching insert point gear a gear i.e. insert divide gear synchronizer 2 by with
The front-seat engagement of gear 2 is switched to engages with rear gear 4, and instrument electronic control unit 12 switchs the change of 6 signals according to pressure signal
Judge to insert a point gear gear mistake, cut-out power takeoff solenoid valve 11, power takeoff 7 is stopped, while " inserting divides gear to put for instrument prompting
Mistake, power takeoff 7 are stopped " and prompted with buzzing.
Operation principle of the present invention：
For vehicle when power takeoff not traveling working properly, driver can insert a point gear according to travel conditions any switching laws
Inserting divides gear synchronizer 3 to engage with front-seat gear 2 or be engaged with rear gear 4, but if power takeoff is in
Working status, cannot arbitrarily switch to insert point gear and insert and divide gear synchronizer 3 to be nibbled with inserting the front-seat gear 2 of point gear at this time.To protect
It is correct that point gear gear is inserted during card power takeoff work, the present invention inserts one pressure signal switch of increase on point gear cylinder 5 in speed changer
6, pressure signal switch 6 is connect by rigid line and switchs 6 signals by pressure signal to instrument electronic control unit 12, instrument electronic control unit 12
Change judge insert divide gear to put.After pressing power take-off valve, vehicular meter electronic control unit judges clutch pedal signal, speed change
Whether device neutral signal and the pressure switch signal inserted on point gear cylinder meet condition, when instrument program judges that all signals are expired
Sufficient condition, which is inserted, divides gear gear correct, and instrument sends the instruction of power takeoff solenoid valves, the ventilation of power takeoff cylinder, and power takeoff is put into gear
Work；When the pressure switch signal on slotting point of gear cylinder, which is unsatisfactory for condition i.e. slotting point, keeps off gear mistake, instrument electronic control unit is not
Meeting drive magnetic valve, power takeoff will not work；When power takeoff has been in normal operating conditions, switching at this time inserts a point gear gear and is
Inserting divides gear synchronizer to be engaged by engaging to switch to front-seat gear with rear gear, and instrument electronic control unit is switched according to pressure signal
The change of signal, which judges to insert, divides a gear gear mistake, cuts off power takeoff solenoid valve, and power takeoff is stopped, and avoids power takeoff work
Gear synchronizer is divided to cause to wear to inserting.
Invention increases a point gear pressure signal switch is inserted, instrument electronic control unit judges to insert a point gear according to pressure switch signal
Gear, it is ensured that speed changer inserts point gear in correct gear when power takeoff works, and effectively prevent the slotting abrasion for dividing gear synchronizer；It is logical
Cross increase and insert point gear cylinder pressure signal switch and the control logic of change activation power takeoff solenoid valve in instrument program
Mode ensures to insert point gear during power takeoff work in correct gear.
The embodiment above of the present invention, is merely illustrative, be not it is only, it is all within the scope of the present invention or it is equivalent this
Change in the range of invention is surrounded by the present invention.
Claims (3)
1. inserted before a kind of band with power takeoff and divide transmission gear error prevention device, it is characterised in that：Including including the automatically controlled list of instrument
First (12), insert a point gear cylinder (5), pressure signal switch (6), power take-off valve (13), power takeoff cylinder (8), power takeoff electromagnetism
Valve (11) and the related gentle pipe of harness (9)；The pressure signal switch (6) is on slotting point of gear cylinder (5), pressure signal switch
(6) connect by rigid line and give instrument electronic control unit (12)；Power take-off valve (13) is connected with instrument electronic control unit (12), and instrument is automatically controlled
Unit (12) is connected with power takeoff solenoid valve (11) to control the power on/off of power takeoff solenoid valve (11), power takeoff solenoid valve (11)
Control the intake and exhaust of power takeoff cylinder (8).
2. inserted before the band according to claim 1 with power takeoff and divide transmission gear error prevention device, it is characterised in that：It is described
Electronic control unit (12) is equipped with power takeoff control module, and power takeoff control module judges whether to drive power takeoff electricity according to coherent signal
Magnet valve (11).
3. the control method for dividing transmission gear error prevention device is inserted before a kind of band with power takeoff using described in claim 1,
It is characterized in that：Include the following steps：
1) when hanging power takeoff, shift signal (14) is neutral gear first, and let slip the clutch (15), presses power take-off valve
(13)；
2) after pressing power take-off valve (13), instrument electronic control unit (12) judges whether clutch pedal (15) is stepped on, speed changer
(1) whether pressure signal switch (6) signal on neutral gear, slotting point of gear cylinder (5) meets condition：
A, instrument electronic control unit (12) judges that pressure signal switch (6) signal meets condition, insert at this time the front-seat gear (2) of point gear with
Insert and divide gear synchronizer (3) to engage passing power, instrument electronic control unit (12) sends power takeoff solenoid valve (11) electrical instruction, power taking
Device cylinder (8) is ventilated, and power takeoff (7) is put into gear work；
B, instrument electronic control unit (12) judges that pressure signal switch (6) signal is unsatisfactory for condition, a point gear rear gear is inserted at this time
(4) gear synchronizer (3) is divided to engage passing power with inserting, instrument electronic control unit (12) will not drive power takeoff solenoid valve (11), take
Power device (7) can not be linked into, while instrument electronic control unit (12) is prompted driver's " inserting a point gear positional fault " and prompted with buzzing；
If C, power takeoff (7) has been in normal operating conditions, at this time switching insert point gear a gear i.e. insert divide gear synchronizer (3) by with
Front-seat gear (2) engagement is switched to engages with rear gear (4), and instrument electronic control unit (12) switchs (6) according to pressure signal and believes
Number change judge insert point gear a gear mistake, cut-out power takeoff solenoid valve (11), power takeoff (7) is stopped, while instrument carries
Show " inserting a point gear positional fault, power takeoff is stopped " and prompted with buzzing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042665.7A CN108019508A (en) | 2018-01-17 | 2018-01-17 | Inserted before band with power takeoff and divide transmission gear error prevention device and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042665.7A CN108019508A (en) | 2018-01-17 | 2018-01-17 | Inserted before band with power takeoff and divide transmission gear error prevention device and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108019508A true CN108019508A (en) | 2018-05-11 |
Family
ID=62071619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810042665.7A Withdrawn CN108019508A (en) | 2018-01-17 | 2018-01-17 | Inserted before band with power takeoff and divide transmission gear error prevention device and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108019508A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662140A (en) * | 2018-06-27 | 2018-10-16 | 中国重汽集团济南动力有限公司 | A kind of list H manipulates the synchronizer protection system of gearbox |
| CN111853222A (en) * | 2020-07-29 | 2020-10-30 | 中国重汽集团济南动力有限公司 | Vehicle gear shifting handle control system and control method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201544792U (en) * | 2009-12-04 | 2010-08-11 | 北汽福田汽车股份有限公司 | Dumper and clutch control device thereof |
| CN202597681U (en) * | 2012-03-28 | 2012-12-12 | 陕西法士特齿轮有限责任公司 | Speed changer range gear mechanism with power take-off |
| CN103047408A (en) * | 2012-12-24 | 2013-04-17 | 三一重工股份有限公司 | Automatic transmission shifting method and vehicle adopting same |
| CN203372107U (en) * | 2013-06-06 | 2014-01-01 | 东风汽车公司 | Double-H controlled power takeoff electronic control system capable of taking off power while running |
| CN104029596A (en) * | 2014-06-23 | 2014-09-10 | 陕西法士特齿轮有限责任公司 | Control method for AMT (automated mechanical transmission) power takeoff unit |
| CN204222650U (en) * | 2014-11-07 | 2015-03-25 | 中国重汽集团济南动力有限公司 | A kind of power takeoff controller |
| CN207796057U (en) * | 2018-01-17 | 2018-08-31 | 中国重汽集团济南动力有限公司 | It is inserted before band with power takeoff and divides transmission gear error prevention device |
-
2018
- 2018-01-17 CN CN201810042665.7A patent/CN108019508A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201544792U (en) * | 2009-12-04 | 2010-08-11 | 北汽福田汽车股份有限公司 | Dumper and clutch control device thereof |
| CN202597681U (en) * | 2012-03-28 | 2012-12-12 | 陕西法士特齿轮有限责任公司 | Speed changer range gear mechanism with power take-off |
| CN103047408A (en) * | 2012-12-24 | 2013-04-17 | 三一重工股份有限公司 | Automatic transmission shifting method and vehicle adopting same |
| CN203372107U (en) * | 2013-06-06 | 2014-01-01 | 东风汽车公司 | Double-H controlled power takeoff electronic control system capable of taking off power while running |
| CN104029596A (en) * | 2014-06-23 | 2014-09-10 | 陕西法士特齿轮有限责任公司 | Control method for AMT (automated mechanical transmission) power takeoff unit |
| CN204222650U (en) * | 2014-11-07 | 2015-03-25 | 中国重汽集团济南动力有限公司 | A kind of power takeoff controller |
| CN207796057U (en) * | 2018-01-17 | 2018-08-31 | 中国重汽集团济南动力有限公司 | It is inserted before band with power takeoff and divides transmission gear error prevention device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662140A (en) * | 2018-06-27 | 2018-10-16 | 中国重汽集团济南动力有限公司 | A kind of list H manipulates the synchronizer protection system of gearbox |
| CN108662140B (en) * | 2018-06-27 | 2024-04-12 | 中国重汽集团济南动力有限公司 | Synchronizer protection system of single H-control gearbox |
| CN111853222A (en) * | 2020-07-29 | 2020-10-30 | 中国重汽集团济南动力有限公司 | Vehicle gear shifting handle control system and control method |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180511 |
|
| WW01 | Invention patent application withdrawn after publication |