CN100575748C - The automatic transimission of oil pressure moving vehicle - Google Patents
The automatic transimission of oil pressure moving vehicle Download PDFInfo
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- CN100575748C CN100575748C CN200310116448A CN200310116448A CN100575748C CN 100575748 C CN100575748 C CN 100575748C CN 200310116448 A CN200310116448 A CN 200310116448A CN 200310116448 A CN200310116448 A CN 200310116448A CN 100575748 C CN100575748 C CN 100575748C
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- 238000001514 detection method Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 230000000881 depressing effect Effects 0.000 claims description 12
- 230000000750 progressive effect Effects 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 description 11
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
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- 238000006731 degradation reaction Methods 0.000 description 1
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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
- F16H61/02—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
- F16H61/0206—Layout of electro-hydraulic control circuits, e.g. arrangement of valves
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/68—Inputs being a function of gearing status
- F16H2059/6838—Sensing gearing status of hydrostatic transmissions
- F16H2059/6861—Sensing gearing status of hydrostatic transmissions the pressures, e.g. high, low or differential pressures
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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
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
- F16H47/04—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the mechanical gearing being of the type with members having orbital motion
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/26—Inputs being a function of torque or torque demand dependent on pressure
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/48—Inputs being a function of acceleration
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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
- F16H61/02—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
- F16H61/0213—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 characterised by the method for generating shift signals
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
The invention provides a kind of travelling state and can automatically select the automatic transimission of the oil pressure moving vehicle of best speed change level corresponding to vehicle.For this reason, automatic transimission possesses: by the driving pump (12) of motor (11) driving; Driving motors (13) by this driving pump driving; Speed changer (14) by this driving motors driving; Be connected with speed changer, will be from the speed changer speed change valve (16) of the pressure oil of pump (19) to this speed changer conveying; The load pressure sensor (33) that travels of the load pressure of the driving pump of pressing oil is carried in detection to driving motors; Be located on the speed changer, detect the speed of a motor vehicle detecting sensor (31) of the speed of a motor vehicle according to the rotation of transmission output shaft; And be more than the specified value at the load pressure that goes out by the load pressure sensor of travelling, and judge that according to the detected speed of a motor vehicle of vehicle speed sensor the oil pressure moving vehicle is under the situation of deceleration regime, transmit the downshift signal to speed change valve, make the controller (30) of speed changer downshift.
Description
Technical field
The present invention relates to the automatic transimission of oil pressure moving vehicle.
Background technique
In the past, be loaded in speed changer as the industrial vehicle of engineering vehicle, owing to must comprise the speed change zone of the common travelling speed that the atomic low-speed region used from original operation is used to the Ordinary Rd that travels, so general all have multistage speed change level on falling back advancing.And, propose a kind of operating condition, can automatically select the scheme of the automatic transmission of best speed change level corresponding to this vehicle, as travelling state feeler mechanism, (for example, the TOHKEMY 5-223149 communiques) such as gas pedal jaw opening sensors of the vehicle speed sensor of the travelling speed of employing detection vehicle or the amount of depressing of detection gas pedal.
Yet, in the oil pressure moving vehicle, corresponding to the change that is applied to the load on oil pressure pump or the hydraulic motor, to be effective with the speed changer of hydraulic motor combination, during the technology that in using TOHKEMY 5-223149 communique, discloses, can not obtain automatically to select the automatic transmission of best speed change level corresponding to the operating condition of oil pressure moving vehicle.Have again, in above-mentioned prior art, also exist high price and complex structure to cause easily breaking down, keep in repair very difficult problem.
Summary of the invention
The present invention is conceived to that the problems referred to above point makes, and its purpose is to provide a kind of operating condition corresponding to vehicle can automatically select the automatic transimission of the oil pressure moving vehicle of best speed change level.
In order to achieve the above object, the 1st of the automatic transimission of oil pressure moving vehicle of the present invention the invention possesses: by engine-driven driving pump; Driving motors by this driving pump driving; Speed changer by this driving motors driving; Be connected with above-mentioned speed changer, will be from the speed changer speed change valve of the pressure oil of pump to this speed changer conveying; The load pressure sensor that travels of the load pressure of the driving pump of pressing oil is carried in detection to above-mentioned driving motors; Be located on the above-mentioned speed changer, detect the speed of a motor vehicle detecting sensor of the speed of a motor vehicle according to the rotation of transmission output shaft; And be more than the specified value at the load pressure that goes out by the above-mentioned load pressure sensor of travelling, and judge that according to the detected speed of a motor vehicle of above-mentioned vehicle speed sensor above-mentioned oil pressure moving vehicle is under the situation of deceleration regime, transmit the downshift signal to above-mentioned speed change valve, make the controller of above-mentioned speed changer downshift.
According to this formation, be more than the specified value at the load pressure of driving pump, and the oil pressure moving vehicle is under the situation of deceleration regime, make the speed changer downshift.Therefore,, automatically select best speed change level,, can travel swimmingly even on the big travel of the running resistances such as ramp that go up a slope, also can not reduce the speed of a motor vehicle significantly corresponding to the travelling state of vehicle as the oil pressure moving vehicle of engineering vehicle.
The 2nd invention of the automatic transimission of oil pressure moving vehicle of the present invention possesses: by engine-driven driving pump; Driving motors by the pressure oil driving that sprays from this driving pump; Speed changer by this driving motors driving; Be connected with above-mentioned speed changer, will be from the speed changer speed change valve of the pressure oil of pump to this speed changer conveying; The pilot pressure valve that travels of the pilot pressure that travels that generation changes according to the amount of depressing of gas pedal; Detect the pilot pressure sensor that travels of the above-mentioned pilot pressure that travels; Be subjected to above-mentionedly travelling pilot pressure and switching to the progressive position or the position of falling back from the neutral position, control is from the control valve that travels of the direction of the pressure oil of above-mentioned driving pump; The load pressure sensor that travels of the load pressure of the driving pump of pressing oil is carried in detection to above-mentioned driving motors; Detect the speed of a motor vehicle detecting sensor of the speed of a motor vehicle of oil pressure moving vehicle; And be more than the specified value at the load pressure that goes out by the above-mentioned load pressure sensor of travelling, and the pilot pressure that is gone out by the above-mentioned pilot pressure sensor of travelling is more than the specified value, and judge that according to the detected speed of a motor vehicle of above-mentioned speed of a motor vehicle detecting sensor above-mentioned oil pressure moving vehicle is under the situation of deceleration regime, transmit the downshift signal to above-mentioned speed change valve, make the controller of above-mentioned speed changer downshift.
According to this formation, be more than the specified value at the load pressure of driving pump, load pressure is more than the specified value, and the oil pressure moving vehicle is under the situation of deceleration regime, makes the speed changer downshift.Therefore, automatically select best speed change level corresponding to the travelling state of vehicle,, can travel swimmingly even on the big travel of the running resistances such as ramp that go up a slope, also can not reduce the speed of a motor vehicle significantly as the oil pressure moving vehicle of engineering vehicle.
In addition, in the automatic transimission of oil pressure moving vehicle, speed Control mechanism can be the dibit switching valve.According to this formation, dibit switching valve simple in structure and that cost is low is made by the speed Control mechanism of speed changer.Therefore, the structure of the automatic transimission of oil pressure moving vehicle is also simple, thereby the manufacture cost of the automatic transimission of oil pressure moving vehicle can reduce.
Have, in the automatic transimission of oil pressure moving vehicle, speed changer can be made two-stage again.According to this formation, can reach cost degradation.And, owing to use above-mentioned load pressure feeler mechanism,, also can obtain equal or do not have a performance level of the problem in the practicality with prior art although make formation at a low price such as dual-range transmission or dibit switching valve.
Description of drawings
Fig. 1 is system's pie graph of the automatic transimission of embodiments of the present invention.
Embodiment
Describe with reference to the mode of execution of accompanying drawing the automatic transmission of oil pressure moving vehicle of the present invention.Fig. 1 is system's pie graph of automatic transimission.
As shown in Figure 1, on motor 11, be connected with driving pump 12, drive driving pump 12 ejections by motor 11 and press oil.From the pressure oil of driving pump 12 ejection by travel control valve 21 and oil pressure with swivel coupling (swivel joint) 15, be sent to driving motors 13.Driving motors 13 is connected drive speed transmission 14 with the input shaft (not shown) of speed changer 14.
Be provided with travelling speed in the speed changer 14 and detect with pump 17, its direct ratio ground that is rotated into the output shaft of speed changer 14 rotates.The pressure oil that detects with pump 17 ejections from travelling speed is sent to travelling speed detection motor 18 by oil pressure with swivel coupling 15.Driving pump 12 is variable oil pressure pumps, has capacity control mechanism 12C.In addition, driving motors 13 is variable hydraulic motors, has capacity control mechanism 13C.
And, the engineering vehicle (not shown) possesses bottom runner (not shown) and upper rotating body (not shown), possess the working machine (not shown) on the upper rotating body, on the joint of bottom runner and upper rotating body, be provided with oil pressure swivel coupling 15.Motor 11 and controller 30 are arranged on the upper rotating body, and speed changer 14 is arranged on the runner of bottom.
Speed changer 14 has planetary gears, according to pressure signal from speed change valve 16, exert pressure or release pressure with 2 grades of clutch 14S with 1 grade of clutch 14F or high speed to the low speed that the gear ratio that can switch planetary gears is used, disconnect the setting speed level thereby close.1 grade of clutch 14F and 2 grades of clutch 14S, be execute compressed oil close clutch, discharge to press the clutch of the mode of oily cut-off clutch.Speed changer 14 has 1 grade and 2 grades of two-stage velocity stages.Making speed changer 14 is that speed change valve 16 is in 1 gear and puts 16A under 1 grade the situation, applies pressure oil from the speed change valve 16 1 grade of clutch that closes to 1 grade of clutch 14F, discharges the pressure oil of 2 grades of clutch 14S, disconnects 2 grades of clutch 14S, and making speed changer 14 is 1 grade.In addition, be that speed change valve 16 is positioned at 2 gears and puts 16B under 2 grades the situation making speed changer 14, apply pressure oil to 2 grades of clutch 14S from speed change valve 16, close 2 grades of clutches, discharge the pressure oil of 1 grade of clutch 14F, disconnect 1 grade of clutch 14F, making speed changer 14 is 2 grades.
The speed of a motor vehicle measuring gear 35 of vehicle speed signal generation usefulness is set on the output shaft of speed of a motor vehicle detection with motor 18, detects with motor 18 rotations by the speed of a motor vehicle.In the periphery of speed of a motor vehicle measuring gear 35, for example form tooth, the otch and concavo-convex of specified quantity.Speed of a motor vehicle detecting sensor 31 near the periphery setting of speed of a motor vehicle measuring gear 35, will be created in the periphery of speed of a motor vehicle measuring gear 35, and for example the pulse that is taken place during the signal detecting part of the tooth of specified quantity by speed of a motor vehicle detecting sensor 31 is as electrical signal.
Speed of a motor vehicle detecting sensor 31 is connected with controller 30, transmits vehicle speed signal as electrical signal to controller 30.Like this, speed of a motor vehicle feeler mechanism is made of speed of a motor vehicle measuring gear 35, speed of a motor vehicle detecting sensor 31 and controller 30.Controller 30 calculation process vehicle speed signal also calculate the speed of a motor vehicle.
The control valve 21 that travels switches to progressive position F or the position R that falls back from illustrated neutral position N, and control is from the direction of the pressure oil of driving pump 12 ejections, and carries to driving motors 13.Control valve 21 travels, the pilot pressure that travels by the switching valve 22 that will fall back from advancing as pilot pressure (pilot pressure) be applied to the advance side compression zone 21F of the control valve 21 that travels or the side compression zone 21R that falls back on, and switch to progressive position F or the position R that falls back from neutral position N.The switching valve 22 that falls back that advances can switch to illustrated progressive position FK according to the progress signal that comes self-controller 30, or switch to the position RK that falls back according to the signal that falls back.
On the pilot pressure valve 23 and advancing of travelling falls back loop between the switching valve 22, be provided with the pilot pressure sensor 32 that travels, the pilot pressure sensor 32 that the travels pilot pressure signal of will detectedly travelling transmits to controller 30.Be provided with the load pressure sensor 33 that travels as load pressure feeler mechanism on driving pump 12 and the loop between the control valve 21 of travelling, the load pressure sensor 33 that the travels load pressure signal that will detectedly travel transmits to controller 30.
The switch 34 that falls back of advancing is connected with controller 30, sends advancement commands signal or backward commands signal to controller 30.If controller 30 accepts to travel the detected pilot pressure signal of travelling of pilot pressure sensor 32,, calculate the amount of depressing of gas pedal 23A then according to the size of the pilot pressure signal of travelling.In addition, if controller 30 is accepted driving pump 12 and the load pressure sensor 33 detected load pressure signals that travel that travel in the loop between the control valve 21 of travelling, then as the load that running resistance produced, the ejection that calculates driving pump 12 presses the pressure of oil whether to surpass specified value.Have, controller 30 calculation process speed of a motor vehicle detecting sensors 31 detected vehicle speed signal as electrical signal calculate the speed of a motor vehicle again.And the timeliness of the calculation process speed of a motor vehicle changes, and judgement is the acceleration mode of speed of a motor vehicle increase or the deceleration regime that the speed of a motor vehicle reduces.
The amount of depressing of the gas pedal 23A that calculates in size according to the above-mentioned pilot pressure signal of travelling be more than the specified value (for example, the amount of depressing more than 3/4 of whole amounts of depressing of gas pedal 23A), and the specified value of the maximum set pressure that the load pressure sensor 33 detected load pressure signals that travel that travel are driving pump 12 is above (for example, more than 80% of the maximum set pressure of driving pump 12), and the timeliness of the calculation process speed of a motor vehicle changes and under the situation of the travelling state of the trying to achieve deceleration regime that to be the speed of a motor vehicle reduce, controller 30 transmits reduce-speed signs to the speed change valve 16 as speed Control mechanism.With swivel coupling 15,1 grade of clutch 14F of the speed changer 14 that closes, and disconnect 2 grades of clutch 14S is 1 grade velocity stage with the velocity stage speed change to speed change valve 16 by oil pressure.Speed changer 14, for example if present velocity stage for advancing 2 grades, then speed change is for advancing 1 grade.
The working principle of automatic transimission of the oil pressure moving vehicle of present embodiment then, is described.The driver, the switch that falls back switches to advance side if will advance, and the switching valve 22 that falls back of then advancing is positioned at progressive position FK, therefore if depress gas pedal 23A, the pilot pressure that then travels is applied on the advance side compression zone 21F of the control valve 21 that travels, and switches to progressive position F from neutral position N.
If the speed of a motor vehicle increases, vehicle speed signal from speed of a motor vehicle detecting sensor 31 is the specified value of 2 grades of acceleration, then controller 30, to be sent to speed change valve 16 as the signal for faster of variable rate signal, speed change valve 16 is switched to 2 gears put 16B, disconnect 1 grade of clutch 14F, 2 grades of clutch 14S closed, with speed changer 14 speed changes for advancing 2 grades.Thus, though engineering vehicle is run at high speed, be expert at when reaching the ramp on slope, because running resistance increases, so the speed of a motor vehicle descends gradually, the ejection pressure of driving pump 12 also increases.The driver will depress gas pedal 23A, to guarantee the speed of a motor vehicle.
And, the amount of depressing of the gas pedal 23A that calculates according to the above-mentioned pilot pressure signal of travelling be more than the specified value (for example, the amount of depressing more than 3/4 of whole amounts of depressing of gas pedal 23A), and the specified value of the maximum set pressure that the load pressure sensor 33 detected load pressure signals that travel that travel are driving pump 12 is above (for example, more than 80% of the maximum set pressure of driving pump 12), and the timeliness of the calculation process speed of a motor vehicle changes and under the situation of the travelling state of the trying to achieve deceleration regime that to be the speed of a motor vehicle reduce, controller 30 transmits reduce-speed signs to the speed change valve 16 as speed Control mechanism.
Accepted the speed change valve 16 of reduce-speed sign, switch to 1 gear and put 16A, by oil pressure swivel coupling 15,2 grades of clutch 14S of open slew device 14, make 1 grade of clutch 14F running of closing, carry out the velocity stage speed change is 1 grade the deceleration of advancing as 1 grade of low speed level.Therefore,, automatically select best speed change level,, can travel swimmingly even on the big travel of the running resistances such as ramp that go up a slope, also can not reduce the speed of a motor vehicle significantly corresponding to the travelling state of vehicle as the oil pressure moving vehicle of engineering vehicle.
Have, speed changer 14 though illustrated to possess 1 grade of structure with 2 grades of two-stage velocity stages as an example, also can be the speed changer with 1 grade, 2 grades and 3 grade 3 step velocity level again.And then, also can be the speed changer that above multistage speed level for example has the 4 step velocity levels that possess 4 grades, can also be the speed changer that the 5 step velocity levels that possess 5 grades are arranged.In addition, the oil pressure moving vehicle can be the vehicle with upper rotating body.For example, also go for wheel loader, fork truck or Other Engineering vehicle.Be applicable at automatic transimission of the present invention under the situation of vehicle, can save oil pressure swivel coupling 15 with upper rotating body.
In the above-described embodiment, 1 grade of clutch 14F that the low speed of speed changer 14 is used and 2 grades of clutch 14S of high speed usefulness are to execute the compressed oil clutch that closes, and discharge the clutch of the mode of pressing oily cut-off clutch.Yet, can make on the contrary on 2 grades of clutch 14S of 1 grade of clutch 14F using at low speed and high speed usefulness the spring that clutch connects usefulness is set, discharge press oil close clutch, execute the mode of compressed oil cut-off clutch.In this mode, be under 1 grade the situation making speed changer 14, discharge pressure oil from 16 to 1 grades of clutch 14F of speed change valve, the 1 grade of clutch that closes is executed compressed oil to 2 grades of clutch 14S and is disconnected 2 grades of clutch 14S, and speed changer 14 is 1 grade.On the other hand, be under 2 grades the situation making speed changer 14, discharge pressure oil from 16 to 2 grades of clutch 14S of speed change valve, the 2 grades of clutches that close are executed compressed oil to 1 grade of clutch 14F and are disconnected 1 grade of clutch 14F, and speed changer 14 is 2 grades.
Claims (3)
1. the automatic transimission of an oil pressure moving vehicle is characterized in that: comprise
Driving pump (12) by motor (11) driving;
Driving motors (13) by the pressure oil driving that sprays from above-mentioned driving pump (12);
Speed changer (14) by this driving motors (13) driving;
Be connected with above-mentioned speed changer (14), will be from the speed changer speed change valve (16) of the pressure oil of pump (19) to above-mentioned speed changer (14) conveying;
The pilot pressure valve (23) that travels of the pilot pressure that travels that generation changes according to the amount of depressing of above-mentioned gas pedal (23A);
Detect the pilot pressure sensor (32) that travels of the above-mentioned pilot pressure that travels;
Be subjected to above-mentionedly travelling pilot pressure and switching to the progressive position or the position of falling back from the neutral position, control is from the control valve that travels (21) of the direction of the pressure oil of above-mentioned driving pump (12);
The load pressure sensor (33) that travels of the load pressure of the above-mentioned driving pump (12) of pressing oil is carried in detection to above-mentioned driving motors (13);
Detect the speed of a motor vehicle detecting sensor (31) of the speed of a motor vehicle of above-mentioned oil pressure moving vehicle; And
Be more than the specified value by the above-mentioned detected load pressure of load pressure sensor (33) that travels, and by the detected pilot pressure that travels of the above-mentioned pilot pressure sensor (32) that travels is more than the specified value, and judge that according to the detected speed of a motor vehicle of above-mentioned speed of a motor vehicle detecting sensor (31) above-mentioned oil pressure moving vehicle is under the situation of deceleration regime, transmit the downshift signal to above-mentioned speed change valve (16), make the controller (30) of above-mentioned speed changer (14) downshift.
2. the automatic transimission of oil pressure moving vehicle according to claim 1 is characterized in that: above-mentioned speed change valve (16) is the dibit switching valve.
3. the automatic transimission of oil pressure moving vehicle according to claim 1 and 2 is characterized in that: above-mentioned speed changer (14) is a two-stage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0227398A GB2395533B (en) | 2002-11-23 | 2002-11-23 | Automatic transmission apparatus of hydraulic travelling vehicle |
| GB0227398.5 | 2002-11-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1502495A CN1502495A (en) | 2004-06-09 |
| CN100575748C true CN100575748C (en) | 2009-12-30 |
Family
ID=9948420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200310116448A Expired - Fee Related CN100575748C (en) | 2002-11-23 | 2003-11-21 | The automatic transimission of oil pressure moving vehicle |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2004176917A (en) |
| CN (1) | CN100575748C (en) |
| DE (1) | DE10354196B4 (en) |
| FR (1) | FR2847635B1 (en) |
| GB (1) | GB2395533B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4787829B2 (en) * | 2005-06-03 | 2011-10-05 | 日立建機株式会社 | Wheel loader automatic transmission and wheel loader |
| CN1944135B (en) * | 2005-10-08 | 2013-03-20 | 比亚迪股份有限公司 | Automobile control system |
| DE102009006468A1 (en) * | 2009-01-29 | 2010-08-05 | Robert Bosch Gmbh | Method and device for changing gears of a hydrostatically driven multi-speed transmission |
| CN110985629B (en) * | 2019-12-26 | 2023-02-17 | 广西柳工机械股份有限公司 | Hydrostatic drive transmission system, speed change control method and loader |
| DE102022210771A1 (en) | 2022-10-12 | 2024-04-18 | Scheuerle Fahrzeugfabrik Gmbh | Drive and transport vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185521A (en) * | 1975-03-10 | 1980-01-29 | Caterpillar Tractor Co. | Hydraulic control system for a hydrostatic-mechanical transmission |
| DE3807599A1 (en) * | 1988-03-08 | 1989-09-28 | Hydromatik Gmbh | AUTOMOTIVE DRIVE DEVICE FOR MACHINES AND VEHICLES |
| DE4223846C2 (en) * | 1992-07-20 | 1996-03-28 | Hydromatik Gmbh | Gear unit for arrangement between a drive motor and a consumer |
| DE4417335A1 (en) * | 1993-06-01 | 1995-03-16 | Michael Meyerle | Continuously variable hydrostatic/mechanical split-torque transmission |
| US6123644A (en) * | 1999-07-19 | 2000-09-26 | Eaton Corporation | Adaptive anti-hunt logic for automated transmission downshift control |
| US6295497B1 (en) * | 1999-10-27 | 2001-09-25 | Caterpillar Inc. | Method and apparatus for adaptively shifting ranges in a continuously variable transmission |
| US6481314B2 (en) * | 2000-01-07 | 2002-11-19 | Kanzaki Kokyukoki Mfg. Co. Ltd. | Vehicle travelling control apparatus |
-
2002
- 2002-11-23 GB GB0227398A patent/GB2395533B/en not_active Expired - Fee Related
-
2003
- 2003-11-10 JP JP2003380106A patent/JP2004176917A/en active Pending
- 2003-11-17 FR FR0313415A patent/FR2847635B1/en not_active Expired - Fee Related
- 2003-11-20 DE DE10354196A patent/DE10354196B4/en not_active Expired - Fee Related
- 2003-11-21 CN CN200310116448A patent/CN100575748C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE10354196A1 (en) | 2004-06-03 |
| GB0227398D0 (en) | 2002-12-31 |
| FR2847635A1 (en) | 2004-05-28 |
| GB2395533A (en) | 2004-05-26 |
| FR2847635B1 (en) | 2006-05-19 |
| DE10354196B4 (en) | 2008-06-05 |
| CN1502495A (en) | 2004-06-09 |
| GB2395533B (en) | 2006-10-04 |
| JP2004176917A (en) | 2004-06-24 |
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Address after: Tokyo, Japan, Japan Applicant after: Komatsu Mfg Co., Ltd. Address before: Durham, England Applicant before: Komatsu Uk Ltd. |
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