CN113007342A - Engineering machinery gearbox and control method thereof - Google Patents
Engineering machinery gearbox and control method thereof Download PDFInfo
- Publication number
- CN113007342A CN113007342A CN202110499345.6A CN202110499345A CN113007342A CN 113007342 A CN113007342 A CN 113007342A CN 202110499345 A CN202110499345 A CN 202110499345A CN 113007342 A CN113007342 A CN 113007342A
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- Prior art keywords
- clutch
- gearbox
- decision
- condition
- controller
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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
- F16H61/04—Smoothing ratio shift
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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
- F16H59/18—Inputs being a function of torque or torque demand dependent on the position of the accelerator pedal
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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
- F16H59/36—Inputs being a function of speed
- F16H59/46—Inputs being a function of speed dependent on a comparison between speeds
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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
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
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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
- F16H59/74—Inputs being a function of engine parameters
- F16H59/78—Temperature
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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
- F16H59/18—Inputs being a function of torque or torque demand dependent on the position of the accelerator pedal
- F16H2059/183—Rate of change of accelerator position, i.e. pedal or throttle change gradient
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses an engineering machinery gearbox and a control method thereof. The engineering machinery gearbox comprises a first input gear train, a second input gear train, a clutch and an output shaft, wherein the second input gear train is in power connection with the output shaft, the clutch is arranged between the first input gear train and the output shaft, the first input gear train can be in power connection with the output shaft when the clutch is in a joint state, and the control end of the clutch is connected with a gearbox controller. The control method comprises the following steps: the method comprises the following steps that a gearbox controller receives engineering machinery working condition information; judging according to the working condition information of the engineering machinery, and making a decision of upshifting or downshifting according to a judgment result; the gearbox controller controls the clutch to be engaged during the gear shifting; the transmission controller controls the clutch to be disconnected during the downshift. The invention can avoid the impact in the gear shifting process of the gearbox, eliminate the sliding friction state when power is input in the clutch combining process, reduce the heat generated by the sliding friction, reduce the deformation of the clutch and prolong the service life of the clutch.
Description
Technical Field
The invention relates to an engineering machinery gearbox and a control method thereof.
Background
The gear control of the transmission of the existing engineering machinery (such as a loader, an excavator and the like) is mostly realized by matching a wet clutch with a gear shifting valve (a mechanical valve or an electric control valve), whether the clutch is combined or not is controlled by the gear shifting valve to realize the gear switching of the automatic transmission, and the gear shifting valve is mostly 4 forward gears and 4 or 3 backward gears. The gear up and down in the automatic gear mode is generally controlled by depressing an accelerator pedal to control the engine speed and the vehicle speed.
The decision of gear-up and gear-down under the automatic gear mode of the existing gearbox is mostly determined according to the relation between traction force and vehicle speed, friction plates are pushed and combined by a piston in the gear switching process, if a driver changes an accelerator or meets the conditions of gradient change and the like in the combining process, impact can occur in the clutch combining process, and because the torque of an engine cannot be actually and effectively controlled in the process, the impact is large in the gear shifting process, the comfort is poor, meanwhile, the abrasion of the friction plates of the clutch can be increased, and the service life of the clutch is influenced.
Disclosure of Invention
The invention aims to provide an engineering mechanical gearbox and a control method thereof aiming at the problems so as to solve the problem of large impact in the gear shifting process of the existing gearbox.
In order to achieve the purpose, the invention discloses an engineering machinery gearbox and a control method thereof.
The invention discloses an engineering machinery gearbox, which comprises a first input gear train capable of receiving output power of a first power source, a second input gear train capable of receiving output power of a second power source, a clutch and an output shaft, wherein the second input gear train is in power connection with the output shaft. The engineering machinery gearbox can realize the switching between single power source input and double power source input, so that the whole vehicle is suitable for different working conditions such as vehicle climbing acceleration, high-speed roadster transportation and the like.
The clutch is a spring brake hydraulic pressure release type wet clutch. The clutch is a normally engaged clutch which can be disengaged when the operating conditions are appropriate.
The gearbox controller is a TCU gearbox controller. The gearbox controller can receive information such as a pedal, a vehicle speed and a water temperature and automatically switch the working state of the gearbox according to the received information.
In order to realize automatic control of the clutch, the control method of the engineering machinery gearbox comprises the following steps: step 1, a transmission controller receives engineering machinery working condition information; step 2, the transmission controller judges according to the working condition information of the engineering machinery and makes a decision of upshifting or downshifting according to a judgment result; step 3, when the gearbox controller makes a decision of upshifting, the gearbox controller controls the clutch to be engaged; when the transmission controller makes a decision to downshift, the transmission controller controls the clutch to disengage.
Specifically, the determination condition for the transmission controller to make an upshift decision includes: the condition 1 is that the pedal opening change rate is less than 10%/s; 2, the vehicle speed is greater than 12 km/h; condition 3, there is an input to the first power source.
Further, the decision condition for the transmission controller to make an upshift decision further comprises: the condition 4 is that the water temperature of the engine is less than 90 ℃; and the speed ratio of the condition 5, the power source rotating speed and the vehicle speed is accurate.
Further, the decision condition for the transmission controller to make an upshift decision further comprises: and 6, judging that the power supply, the heat dissipation, the oil temperature and the message loss rate are normal by the diagnosis system.
Specifically, the determination conditions under which the transmission controller makes a downshift decision include: the method comprises the following steps of 1, wherein the pedal opening change rate is more than 50%/s or the pedal opening is more than 80%; 2, the vehicle speed is less than 4 km/h; condition 3, no input to the first power source.
Further, the decision condition for the transmission controller to make a downshift decision further includes: the condition 4 is that the water temperature of the engine is less than 90 ℃; and the speed ratio of the condition 5, the power source rotating speed and the vehicle speed is accurate.
Further, the decision condition for the transmission controller to make a downshift decision further includes: and 6, judging that the power supply, the heat dissipation, the oil temperature and the message loss rate are normal by the diagnosis system.
In conclusion, the beneficial effects of the invention are as follows: 1. eliminating the sliding state when power is input in the clutch combining process; 2. the heat generated by the sliding friction is reduced, the deformation of the clutch is reduced, and the service life of the clutch is prolonged. 3. Impact in the gear shifting process of the gearbox is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a transmission of a construction machine according to the present invention;
FIG. 2 is a control logic diagram of the transmission of the engineering machinery in the invention;
FIG. 3 is a logic diagram of a control method of a gearbox of a construction machine.
In the figure: 1. a first power source; 2. a first input gear train; 3. a second power source; 4. a second input gear train; 5. a clutch; 6. an output shaft; 7. a transmission controller.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.
Example 1: referring to fig. 1 and 2, the engineering machinery gearbox comprises a first input gear train 2 capable of receiving output power of a first power source 1, a second input gear train 4 capable of receiving output power of a second power source 3, a clutch 5 and an output shaft 6, wherein the second input gear train 4 is in power connection with the output shaft 6, the engineering machinery gearbox is characterized in that the clutch 5 is arranged between the first input gear train 2 and the output shaft 6, the clutch 5 is in a joint state, the first input gear train 2 can be in power connection with the output shaft 6, and a control end of the clutch 5 is connected with a gearbox controller 7.
Preferably, the clutch 5 is a spring brake hydraulic pressure release type wet clutch 5, and the clutch 5 is a normally engaged clutch, and the clutch is controlled to be disengaged when the operation state is appropriate.
Preferably, the transmission controller 7 is a TCU transmission controller 7, and the TCU transmission controller 7 is a conventional art, and generally comprises a 16-bit or 32-bit processor, a signal processing circuit, a power driving module, and the like, and is used for realizing automatic control of the transmission.
Example 2: referring to fig. 2 and 3, the control method of the engineering machinery gearbox comprises the following steps: step 1, a gearbox controller 7 receives engineering machinery working condition information; step 2, the transmission controller 7 judges according to the working condition information of the engineering machinery and makes a decision of upshifting or downshifting according to a judgment result; step 3, when the gearbox controller 7 makes a decision to upshift, the gearbox controller 7 controls the clutch 5 to be engaged; when the gearbox controller 7 makes a decision to downshift, the gearbox controller 7 controls the clutch 5 to be disengaged.
The decision conditions for the gearbox controller 7 to make an upshift decision include: the method comprises the following steps that 1, the pedal opening change rate is less than 10%/s, the pedal is used for controlling the output power of two power sources, and the output power is high when the pedal opening is large; 2, the vehicle speed is greater than 12 km/h; condition 3, the first power source 1 has an input; the condition 4 is that the water temperature of the engine is less than 90 ℃; and 5, the speed ratio of the rotating speed of the power source and the vehicle speed is accurate, wherein the accurate speed ratio refers to the bad conditions of reliable transmission, no slip and the like. And 6, judging that the power supply, the heat dissipation, the oil temperature and the message loss rate are normal by the diagnosis system.
Example 3: referring to fig. 2 and 3, the control method of the engineering machinery gearbox comprises the following steps: step 1, a gearbox controller 7 receives engineering machinery working condition information; step 2, the transmission controller 7 judges according to the working condition information of the engineering machinery and makes a decision of upshifting or downshifting according to a judgment result; step 3, when the gearbox controller 7 makes a decision to upshift, the gearbox controller 7 controls the clutch 5 to be engaged; when the gearbox controller 7 makes a decision to downshift, the gearbox controller 7 controls the clutch 5 to be disengaged.
The decision conditions for the transmission controller 7 to make a downshift decision include: the method comprises the following steps that 1, the pedal opening change rate is greater than 50%/s or the pedal opening is greater than 80%, the pedal is used for controlling the output power of two power sources, and if the pedal opening is large, the output power is large; 2, the vehicle speed is less than 4 km/h;
condition 3, no input to the first power source 1. The condition 3 is that the water temperature of the engine is less than 90 ℃; and 4, the speed ratio of the rotating speed of the power source and the vehicle speed is accurate, wherein the accurate speed ratio refers to the bad conditions of reliable transmission, no slip and the like. And 6, judging that the power supply, the heat dissipation, the oil temperature and the message loss rate are normal by the diagnosis system.
The invention is mainly aimed at supporting the working state of two-gear transmission with two power sources (namely a first power source 1 and a second power source 3 in the invention), wherein the power sources can be hydraulic motors or electric motors. When the whole vehicle needs power, such as acceleration or climbing, the two power sources simultaneously input and convert the power to the output shaft 6 to obtain large torque and power output; when high-power large-torque output is not needed, one power source is switched, only one power source is input to ensure the energy requirement of the whole vehicle, the energy conservation and high efficiency of the whole vehicle are realized, and the noise of the whole vehicle is reduced. For a vehicle: the two power sources are in a low gear state when being input simultaneously, and one power source is in a high gear state when being input. When the vehicle starts to accelerate, the two power sources are input simultaneously, and the vehicle has large traction force for acceleration; when the vehicle speed reaches a certain value, the working mode can realize the working efficiency at low speed and the energy consumption optimization of the whole vehicle at high speed.
The scheme is used for controlling the working modes of the input working state of the first power source 1 and the input state of the second power source 2, namely adjusting the gear and the speed ratio of the gearbox and controlling the final input torque and power of the gearbox. The core control point is the working state of the clutch 5 in the transmission route of the first power source 1: namely whether the two power sources are input together or not is controlled by the clutch, and the basic control state is shown in table 1:
TABLE 1
The technical scheme of the invention can eliminate the sliding state when power is input in the clutch combining process; the heat generated by the sliding mill can be reduced, the deformation generated by the clutch can be reduced, and the service life of the clutch can be prolonged; impact in the gear shifting process of the gearbox can be avoided.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The engineering machinery gearbox comprises a first input gear train (2) capable of receiving output power of a first power source (1), a second input gear train (4) capable of receiving output power of a second power source (3), a clutch (5) and an output shaft (6), wherein the second input gear train (4) is in power connection with the output shaft (6), the engineering machinery gearbox is characterized in that the clutch (5) is arranged between the first input gear train (2) and the output shaft (6), the clutch (5) is in a joint state and can enable the first input gear train (2) to be in power connection with the output shaft (6), and the control end of the clutch (5) is connected with a gearbox controller (7).
2. The construction machinery gearbox according to claim 1, wherein the clutch (5) is a spring brake hydraulic pressure release type wet clutch (5).
3. The work machine gearbox according to claim 1, characterised in that the gearbox controller (7) is a TCU gearbox controller (7).
4. A control method of a transmission of a construction machine according to any one of claims 1-3, characterized by comprising the steps of:
step 1, a gearbox controller (7) receives engineering machinery working condition information;
step 2, the gearbox controller (7) judges according to the working condition information of the engineering machinery and makes a decision of upshifting or downshifting according to a judgment result;
step 3, when the gearbox controller (7) makes a decision to upshift, the gearbox controller (7) controls the clutch (5) to be engaged; when the gearbox controller (7) makes a decision to downshift, the gearbox controller (7) controls the clutch (5) to be disconnected.
5. The control method of a construction machine transmission according to claim 4, wherein the decision condition for the transmission controller (7) to make an upshift decision comprises:
the condition 1 is that the pedal opening change rate is less than 10%/s;
2, the vehicle speed is greater than 12 km/h;
condition 3, the first power source (1) has an input.
6. The control method of a construction machine transmission according to claim 5, wherein the decision condition for the transmission controller (7) to make an upshift decision further comprises:
the condition 4 is that the water temperature of the engine is less than 90 ℃;
and the speed ratio of the condition 5, the power source rotating speed and the vehicle speed is accurate.
7. The control method of a construction machine transmission according to claim 5, wherein the decision condition for the transmission controller (7) to make an upshift decision further comprises:
and 6, judging that the power supply, the heat dissipation, the oil temperature and the message loss rate are normal by the diagnosis system.
8. The control method of a construction machine transmission according to claim 4, wherein the determination condition under which the transmission controller (7) makes a downshift decision includes:
the method comprises the following steps of 1, wherein the pedal opening change rate is more than 50%/s or the pedal opening is more than 80%;
2, the vehicle speed is less than 4 km/h;
condition 3, no input is made to the first power source (1).
9. The control method of a construction machine transmission according to claim 8, wherein the determination condition under which the transmission controller (7) makes a downshift decision further includes:
the condition 3 is that the water temperature of the engine is less than 90 ℃;
and the condition 4, the speed ratio of the power source rotating speed and the vehicle speed is accurate.
10. The control method of a construction machine transmission according to claim 8, wherein the determination condition under which the transmission controller (7) makes a downshift decision further includes:
and 6, judging that the power supply, the heat dissipation, the oil temperature and the message loss rate are normal by the diagnosis system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110499345.6A CN113007342A (en) | 2021-05-08 | 2021-05-08 | Engineering machinery gearbox and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110499345.6A CN113007342A (en) | 2021-05-08 | 2021-05-08 | Engineering machinery gearbox and control method thereof |
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| Publication Number | Publication Date |
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| CN113007342A true CN113007342A (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110499345.6A Pending CN113007342A (en) | 2021-05-08 | 2021-05-08 | Engineering machinery gearbox and control method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100030438A1 (en) * | 2006-12-06 | 2010-02-04 | Brattberg Bjoern | method and a system for controlling a vehicle |
| CN102535573A (en) * | 2012-03-19 | 2012-07-04 | 广西柳工机械股份有限公司 | Intelligent automatic speed change control system for loading machine and control method for intelligent automatic speed change control system |
| CN104455244A (en) * | 2014-12-10 | 2015-03-25 | 天津工程机械研究院 | Stepless speed changing system for engineering machinery and hydraulic machinery |
| CN111271436A (en) * | 2020-02-26 | 2020-06-12 | 柳工柳州传动件有限公司 | Transmission, transmission system and loader |
| CN212839036U (en) * | 2020-08-17 | 2021-03-30 | 雷沃重工股份有限公司 | Wet clutch |
-
2021
- 2021-05-08 CN CN202110499345.6A patent/CN113007342A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100030438A1 (en) * | 2006-12-06 | 2010-02-04 | Brattberg Bjoern | method and a system for controlling a vehicle |
| CN102535573A (en) * | 2012-03-19 | 2012-07-04 | 广西柳工机械股份有限公司 | Intelligent automatic speed change control system for loading machine and control method for intelligent automatic speed change control system |
| CN104455244A (en) * | 2014-12-10 | 2015-03-25 | 天津工程机械研究院 | Stepless speed changing system for engineering machinery and hydraulic machinery |
| CN111271436A (en) * | 2020-02-26 | 2020-06-12 | 柳工柳州传动件有限公司 | Transmission, transmission system and loader |
| CN212839036U (en) * | 2020-08-17 | 2021-03-30 | 雷沃重工股份有限公司 | Wet clutch |
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Application publication date: 20210622 |
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