CN110758027A - Hydraulic transmission wheel type engineering machinery tire pressure monitoring and early warning method - Google Patents
Hydraulic transmission wheel type engineering machinery tire pressure monitoring and early warning method Download PDFInfo
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- CN110758027A CN110758027A CN201910986069.9A CN201910986069A CN110758027A CN 110758027 A CN110758027 A CN 110758027A CN 201910986069 A CN201910986069 A CN 201910986069A CN 110758027 A CN110758027 A CN 110758027A
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- torque
- rotating speed
- tire pressure
- engineering machinery
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 45
- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005096 rolling process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0401—Signalling devices actuated by tyre pressure mounted on the wheel or tyre characterised by the type of alarm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0486—Signalling devices actuated by tyre pressure mounted on the wheel or tyre comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a hydraulic wheel type engineering machinery tire pressure monitoring and early warning method, for a vehicle which normally runs or operates under the conditions of rated load capacity and rated air pressure, the rotating speed and the torque of an output shaft of a gearbox on a CAN bus of a vehicle controller are read, data in a first set time period are intercepted and averaged, the rotating speed and the torque average value are respectively taken as a rotating speed reference value and a torque reference value, and reasonable areas of the torque and the rotating speed are respectively divided by setting a torque limit value and a rotating speed limit value; and if the monitored torque and the monitored rotating speed of the vehicle are both continuously located outside the reasonable area and exceed the second preset time, tire pressure alarming is carried out. The method comprehensively considers the characteristic of variable engineering mechanical load, and realizes monitoring and early warning of the tire pressure of the vehicle by considering the torque, the rotating speed and the duration of the transmission shaft.
Description
Technical Field
The invention belongs to the field of hydraulic transmission systems of engineering machinery, and particularly relates to a tire pressure monitoring system of wheel type engineering machinery based on the change of the rotating speed and the torque of a transmission part, which realizes the prejudgment and the alarm control of tire pressure.
Background
In the prior art, wheel-type engineering machinery such as a loader, a cross-country tire crane, an excavating loader and the like can often run under a load working condition, so that the load of the whole vehicle, the load of each drive axle and the load of tires can change along with the difference of working states, and the change of the pressure of the tires can cause the change of the radius.
The tire pressure monitoring and automatic adjusting technology is used for monitoring the pressure borne by the automobile tire in real time through a certain monitoring means and automatically adjusting the tire pressure according to different working condition requirements, and is widely applied to passenger vehicles.
However, the existing monitoring means usually utilizes a wireless pressure sensor to measure each tire, or real-time monitoring is carried out on automobile tires according to factors such as driving road conditions and driving speed, and the like, and the testing system is suitable for the condition that the load of a passenger car is neglected, and can not meet the requirement of load-carrying operation of engineering machinery.
Disclosure of Invention
The technical problems to be solved by the invention are as follows:
the invention aims to provide a control method for indirectly monitoring the tire pressure of a hydraulic transmission wheel type engineering machine, which is used for solving the problems that the whole vehicle oil consumption is increased due to the increase of the whole vehicle running resistance caused by the change of the rolling radius caused by the tire pressure under the working condition of carrying running or operation, and preventing the tire from bursting to a certain extent.
The complete technical scheme provided by the invention is as follows:
a hydraulic transmission wheel type engineering machinery tire pressure monitoring and early warning method is used for reading the rotating speed and the torque of an output shaft of a gearbox on a CAN bus of a vehicle controller for a vehicle which normally runs or works under the conditions of rated load capacity and rated air pressure, intercepting data in a first set time period to obtain an average value, taking the rotating speed and the torque average value as a rotating speed reference value and a torque reference value respectively, and dividing reasonable areas of the torque and the rotating speed respectively by setting a torque limit value and a rotating speed limit value;
and if the monitored torque and the monitored rotating speed of the vehicle are both continuously located outside the reasonable area and exceed the second preset time, tire pressure alarming is carried out.
Further, the set torque limit is greater than the torque reference value.
Further, the reasonable range of torque is the region between the torque reference value and the torque limit value.
Further, the set rotation speed limit value is smaller than the rotation speed reference value.
Further, the reasonable region of the rotation speed is a region between the rotation speed reference value and the rotation speed limit value.
Further, the monitored torque and speed of the vehicle is obtained by reading the transmission output shaft torque and speed within the transmission controller.
Further, the torque and speed of the vehicle being monitored are estimated using engine and torque converter characteristic data.
Further, the torque and the rotating speed of the output shaft of the gearbox are calculated by utilizing the common working characteristics of the engine and the hydraulic torque converter and obtaining the parameters of the engine through an engine controller and combining the parameters with each speed ratio of the gearbox.
Further, a control program comprising the method is adopted in the vehicle control unit to monitor and early warn the tire pressure of the hydraulic transmission wheel type engineering machinery.
The invention achieves the following beneficial effects:
compared with the prior art, on one hand, the technical scheme of the invention can indirectly monitor and control the tire pressure without introducing a wireless pressure sensor; on the other hand, the invention can meet the requirement of the tire pressure monitoring under the specific loading condition of the engineering machinery, which is different from the tire pressure monitoring mode of neglecting the load of the passenger vehicle.
Drawings
FIG. 1 is a schematic diagram of a transmission structure of a hydraulic transmission wheel type engineering machinery chassis;
FIG. 2 shows a data transmission principle of a CAN bus of a whole vehicle;
FIG. 3 is a flow chart of a control implementation of a tire pressure monitoring method;
FIG. 4 is a schematic diagram of a tire pressure warning;
in the figure, an engine 1, a hydraulic torque converter 2, a gearbox 3, a drive axle 4, a transmission shaft 5, tires 6, an engine control ECU7, a gearbox controller TCU8, a cab instrument display 9, a function switch 10 and a vehicle control unit VCU 11.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The invention provides a tire pressure monitoring and early warning system of hydraulic transmission wheel type engineering machinery, as shown in figure 1, a corresponding function switch 10 can be added by mainly utilizing the existing engine 1, a hydraulic torque converter 2, a gearbox 3, a drive axle 4, a transmission shaft 5, tires 6, an engine controller ECU7, a gearbox controller TCU8, a cab instrument display 9 and a vehicle control unit VCU11 of the hydraulic transmission wheel type engineering machinery, tire pressure warning information is added in an interface of the cab instrument display 9, and the monitoring and early warning of the tire pressure of the hydraulic transmission wheel type engineering machinery is realized by improving a control method in the vehicle control unit VCU 1. In other embodiments, a single controller can be used to implement the tire pressure monitoring and early warning for the hydraulic transmission wheel type engineering machinery.
The transmission form of the hydraulic transmission wheel type engineering machinery chassis is as follows: the engine 1 is connected with a gearbox 3 through a hydraulic torque converter 2, then is connected with a front drive axle 4 and a rear drive axle 4 through a transmission shaft 5, and finally transmits power to tires 6 to realize vehicle motion.
As shown in FIG. 2, the data among the transmission controller TCU8, the engine controller ECU7 and the vehicle control unit VCU11 are transmitted through a CAN bus, and the real-time data of each part controller CAN be read through the CAN bus.
The tire pressure monitoring and early warning method is compiled into a tire pressure detection system program and integrated in a VCU11 of a vehicle control unit; the control strategy and the flow realized by the monitoring and early warning method are shown in the figures 3 and 4:
firstly, the functional switch 10 of the tire pressure monitoring system can be selected to be turned on according to the road condition of the whole vehicle, and the functional switch 10 can be selected to be turned off for specific working conditions, such as climbing and muddy road;
when a vehicle runs or works under the conditions of rated load capacity and rated air pressure of tires, the rotating speed and the torque of an output shaft of a gearbox on a CAN bus of a vehicle controller are read, numerical values in a set time period are intercepted, averaged and recorded, the rotating speed and the torque average are respectively used as a rotating speed reference and a torque reference, and reasonable areas are divided by setting a torque limit value and a rotating speed limit value;
the set torque limit is greater than the torque reference value. The set rotation speed limit value is smaller than the rotation speed reference value.
In the actual working condition of the whole vehicle, the torque and the rotating speed of the output shaft of the gearbox in the gearbox controller are read, the external characteristic of the hydraulic torque converter can be used for calculating, the obtained result of the actual working condition is compared with the rated torque and the rotating speed of the transmission shaft, and the comparison duration is recorded;
when the characteristic data of the hydraulic torque converter is relied on, the parameters of the engine are obtained through the engine controller ECU7 by utilizing the common working characteristics of the engine and the torque converter, and the parameters are combined with each speed ratio of the gearbox to calculate the torque and the rotating speed of the output shaft of the gearbox;
the reduction of the tire pressure of the wheel type engineering machinery can reduce the rolling radius, the change of the rolling radius can cause the tire to roll and slide at the same time, the resistance of the whole vehicle is increased, and the torque and the rotating speed of the transmission shaft are changed along with the resistance; the change of the rolling radius of the tire is indirectly monitored by monitoring the torque and the rotating speed of the transmission shaft, namely the torque and the rotating speed of an output shaft of the gearbox, so that the tire pressure condition is deduced.
When the vehicle normally works, the output shaft torque of the gearbox has a torque value with small fluctuation, an average value is taken as a reference through the test of the working condition of the whole vehicle, when the vehicle normally works, under the condition of rated tire pressure, the output shaft torque value of the gearbox cannot fluctuate too much, so that the torque value is reasonable through a reasonable area with the torque, if the torque value is outside the reasonable area for a long time, the tire pressure is low, and then the alarm is given. The reasonable range of torque is the region between the torque reference and the torque limit. The reasonable region of the rotation speed is the region between the rotation speed reference value and the rotation speed limit value.
If the torque is increased, the rotating speed is reduced, so that the parameter of the rotating speed is introduced and also used as a reference for comparison, the torque is increased, the rotating speed is reduced, the time is long, and the alarm is realized.
For a manual transmission, or a transmission without a controller, the engine controller ECU7 may be used to estimate the output torque and speed of the transmission using the engine and torque converter operating point.
In this embodiment, mainly take the full-automatic transmission as an example to explain, to through manual transmission, also utilize transmission output torque, rotational speed and obtain the moment of torsion, the rotational speed of transmission shaft like the same, and then realize the monitoring to the tire pressure.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A hydraulic transmission wheel type engineering machinery tire pressure monitoring and early warning method is characterized in that,
for a vehicle which normally runs or works under the conditions of rated load capacity and rated air pressure of tires, reading the rotating speed and torque of an output shaft of a gearbox on a CAN bus of a vehicle controller, intercepting data in a first set time period to obtain an average value, taking the rotating speed and torque average value as a rotating speed reference value and a torque reference value respectively, and dividing reasonable areas of the torque and the rotating speed respectively by setting a torque limit value and a rotating speed limit value;
and if the monitored torque and the monitored rotating speed of the vehicle are both continuously located outside the reasonable area and exceed the second preset time, tire pressure alarming is carried out.
2. The tire pressure monitoring and early warning method for the hydraulic transmission wheel type engineering machinery as claimed in claim 1, wherein the set torque limit value is greater than the torque reference value.
3. The tire pressure monitoring and early warning method for the hydraulic transmission wheel type engineering machinery as claimed in claim 1 or 2, wherein the reasonable torque region is a region between a torque reference value and a torque limit value.
4. The tire pressure monitoring and early warning method for the hydraulic transmission wheel type engineering machinery as claimed in claim 1, wherein the set rotation speed limit value is smaller than the rotation speed reference value.
5. The tire pressure monitoring and early warning method for the hydraulic transmission wheel type engineering machinery as claimed in claim 1 or 4, wherein the reasonable region of the rotating speed is the region between the rotating speed reference value and the rotating speed limit value.
6. The tire pressure monitoring and early warning method for the hydraulic transmission wheel type engineering machinery as claimed in claim 1, wherein the torque and the rotating speed of the monitored vehicle are obtained by reading the torque and the rotating speed of an output shaft of a transmission case in a transmission case controller.
7. The tire pressure monitoring and early warning method for hydraulic transmission wheel type engineering machinery as claimed in claim 1, wherein the torque and the rotating speed of the monitored vehicle are calculated by using the characteristic data of the engine and the hydraulic torque converter.
8. The tire pressure monitoring and early warning method for the hydraulic transmission wheel type engineering machinery as claimed in claim 7, wherein the torque and the rotating speed of the output shaft of the gearbox are calculated by utilizing the common working characteristics of the engine and the hydraulic torque converter, acquiring the parameters of the engine through an engine controller and combining the parameters with the speed ratios of the gearbox.
9. The tire pressure monitoring and early warning method for the hydraulic transmission wheel type engineering machinery as claimed in claim 1, wherein a control program comprising the method is adopted in a vehicle control unit to monitor and early warn the tire pressure of the hydraulic transmission wheel type engineering machinery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910986069.9A CN110758027A (en) | 2019-10-17 | 2019-10-17 | Hydraulic transmission wheel type engineering machinery tire pressure monitoring and early warning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910986069.9A CN110758027A (en) | 2019-10-17 | 2019-10-17 | Hydraulic transmission wheel type engineering machinery tire pressure monitoring and early warning method |
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| CN110758027A true CN110758027A (en) | 2020-02-07 |
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| CN201910986069.9A Pending CN110758027A (en) | 2019-10-17 | 2019-10-17 | Hydraulic transmission wheel type engineering machinery tire pressure monitoring and early warning method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2357147A (en) * | 1999-12-07 | 2001-06-13 | Rover Group | Estimating wheel speed as a function of applied torque and estimated resistive torque |
| WO2001056815A1 (en) * | 2000-02-02 | 2001-08-09 | Continental Teves Ag & Co. Ohg | Method and device for detecting tyre pressure loss by evaluating reference variables and use thereof |
| WO2003078182A1 (en) * | 2002-03-16 | 2003-09-25 | Robert Bosch Gmbh | System for monitoring the state of a tyre |
| CN102345735A (en) * | 2011-09-21 | 2012-02-08 | 山推工程机械股份有限公司 | Locking and unlocking method and related device applied to hydraulic torque converter of engineering machine |
| CN102887120A (en) * | 2012-06-15 | 2013-01-23 | 浙江吉利汽车研究院有限公司杭州分公司 | Method for strengthening message of CAN (Controller Area Network) bus |
| CN104773168A (en) * | 2015-04-03 | 2015-07-15 | 安徽机电职业技术学院 | Automatic transmission automobile tire burst control system and method based on safety braking |
-
2019
- 2019-10-17 CN CN201910986069.9A patent/CN110758027A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2357147A (en) * | 1999-12-07 | 2001-06-13 | Rover Group | Estimating wheel speed as a function of applied torque and estimated resistive torque |
| WO2001056815A1 (en) * | 2000-02-02 | 2001-08-09 | Continental Teves Ag & Co. Ohg | Method and device for detecting tyre pressure loss by evaluating reference variables and use thereof |
| WO2003078182A1 (en) * | 2002-03-16 | 2003-09-25 | Robert Bosch Gmbh | System for monitoring the state of a tyre |
| CN102345735A (en) * | 2011-09-21 | 2012-02-08 | 山推工程机械股份有限公司 | Locking and unlocking method and related device applied to hydraulic torque converter of engineering machine |
| CN102887120A (en) * | 2012-06-15 | 2013-01-23 | 浙江吉利汽车研究院有限公司杭州分公司 | Method for strengthening message of CAN (Controller Area Network) bus |
| CN104773168A (en) * | 2015-04-03 | 2015-07-15 | 安徽机电职业技术学院 | Automatic transmission automobile tire burst control system and method based on safety braking |
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