CN101109437A - AMT system ECU of heavy-duty car - Google Patents
AMT system ECU of heavy-duty car Download PDFInfo
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- CN101109437A CN101109437A CNA2007100148422A CN200710014842A CN101109437A CN 101109437 A CN101109437 A CN 101109437A CN A2007100148422 A CNA2007100148422 A CN A2007100148422A CN 200710014842 A CN200710014842 A CN 200710014842A CN 101109437 A CN101109437 A CN 101109437A
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Abstract
The invention discloses an ECU for AMT system of a heavy duty automobile, which solves such problem that no AMT system is available for heavy duty automobile at present, and the AMT system from abroad is expensive and can't be used in high quantity in heavy duty automobiles in China. The invention is of simple structure, easy to use, highly reliable, can meet requirements for heavy duty automobiles. The structure comprises a power supply, and a control circuit comprising a digital signal processing DSP chip and a large-scale logical programming CPLD chip. The input end of the control circuit is connected with a detection unit of the automobile, and the output end is connected with the transmission mechanism of the automobile; the control circuit is also connected with a communication unit and the power supply.
Description
Technical field
The present invention relates to be used for the ECU of AMT system, be specifically related to a kind of ECU of AMT system that is used for heavy-duty car.
Background technique
AMT is the high-tech product of a kind of mechanical, electrical, liquid, gas integral.Its basic controlling thought is: according to driver's the intention (accelerator pedal, brake petal, selector switch etc.) and the state (engine speed, input shaft rotating speed, the speed of a motor vehicle, gear etc.) of vehicle, according to the rule (process of power shift of setting, clutch rule etc.), by corresponding actuator (Throttle Opening Control actuator, gear-selecting and shifting executing mechanism, clutch separation and engage actuator), the power transmission system (motor, clutch, speed changer) of vehicle is jointly controlled.
China's AMT development work is started late, the enforcement period of the ninth five-year plan, the development of AMT and commercialization are put into country " 95 " key scientific and technological projects, the AMT development technique of present China, especially its core---ECU hardware and software development, mainly rest on the experimental study stage, domestic heavy-duty car automatic transmission can only be leaned on import, objectively needs the automatic transmission of low price in a hurry.In addition, from the demand in market and the trend angle of safety, environmental protection and energy-conserving product development, research and development have independent intellectual property right, with the car load matched and with the integrated electric control mechanical type automatic speed variator of other Electronic Control Assembly networking, to improving the content of heavy vapour product technology, increase the kind of product, widen market, strengthening competitive ability has very real and important meaning, will produce active promoting function to the development of China's heavy-duty car technology.
Summary of the invention
Purpose of the present invention is exactly in order to solve the domestic heavy-duty car AMT system that lacks at present, and external this type of equipment price costliness, can not be widely used in problems such as domestic heavy-duty car, provide a kind of have simple in structure, easy to use, good reliability can satisfy the ECU of AMT system of the heavy-duty car of advantages such as heavy-duty car needs
For achieving the above object, the present invention adopts following technological scheme:
A kind of ECU of AMT system of heavy-duty car, it comprises power supply, it also comprises the control circuit of being made up of Digital Signal Processing dsp chip and extensive logic programmable CPLD chip, the input end of control circuit connects with the vehicle detection unit, its output terminal is connected with transmission of vehicle, and control circuit also is connected with power supply with communication unit.
Analog sensors such as described vehicle detection unit pack oil scraper door pedal, clutch pedal, gear shift handle, clutch displacement, air pressure, 3-axis acceleration, gear selecting, they are connected with the dsp chip input end; Boolean value output sensors such as handle button, reverse gear switch, neutral switch, high and low shift switch, lifting shelves button, throttle restriction bit switch, separation brake switch, brake switch, they are connected with CPLD chip input end; Motor, jack shaft, OSS, they are connected with CPLD chip input end.
Described speed probe has two classes, and transmission output shaft adopts the sensor with orthogonal coding output, and is connected with the quadrature decoder circuit, calculates the output shaft rotating speed.Transmission input shaft and jack shaft adopt magnetic resistance or Hall transducer, they detect gear, along with the distance between gear teeth tips, backlash and the sensor changes, the output of sensor also changes, after the sensor output signal shaping got square signal, when gear rotation is crossed a tooth, the square wave of output one-period; The CPLD chip is according to the number of teeth M that turns in the preceding next sampling period of tachometer value estimation several times, and assign it to down counter, when first rising edge of measured signal arrives in one-period instantly, start down counter and begin counting, and start the high-speed counting clock simultaneously, what the rising edge that turns over the pulse that each tooth produces made down counter subtracts 1, when being kept to of down counter is zero, stop the counting of high-speed counting clock, flag bit is set, and the count value Z of high-speed counting clock is preserved wait CPLD chip read, this moment, the count value Z of high-speed counting clock turned over M the time that tooth is required; At next cycle, whether counter 1 is set flag bit to the CPLD chip detection, as then not adopting the speed in last cycle, not the counting initial value of refresh timing counter 1; Set flag bit if detect counter 1, then the count value z according to high speed timer counter clock 2 recomputates speed, and refreshes the counting initial value of down counter; The least count initial value of down counter is 1, and at this moment, measurement error is the count cycle of ± 1 high-speed counting clock; When the least count initial value M of down counter greater than 1 the time, the rotating speed that record this moment is a mean velocity of gear rotation being crossed a plurality of teeth, in this case, the square-wave cycle error of a tooth is ± count cycle of a 1/M high speed timer counter clock.
Described communication unit adopts CAN and two kinds of communication modes of RS-485, can communicate by letter with the upper-position unit debugging acid by the CAN bus, to the realtime monitoring of AMT system, finishes system debug; Communicate by letter with display modular by 485 buses, finish the real-time demonstration of current gear and gear shift handling position.
Described control circuit has 20 road digital quantity I/O mouths, finish handle button, reverse gear switch, neutral switch, high and low shift switch, lifting shelves button, throttle restriction bit switch, separate the collection of switching values such as brake switch, brake switch, and respectively engine speed, jack shaft rotating speed, output shaft rotating speed are gathered by Hall transducer and orthogonal encoder, calculate the rotating speed of three axles, for automaitc shfit provides the gear shift foundation; Have 18 road analog quantity inputs, can finish 16 AD conversions analog sensors such as gas pedal, clutch pedal, gear shift handle, clutch displacement, air pressure, 3-axis acceleration, gear selectings; Have the output of 16 road power switch pipes, can finish the control of selecting shift valve, high and low shift selector valve, clutch, throttle, coordinate to finish the automaitc shfit process.
Characteristics of the present invention are:
(1) the basic circuit design adopts advanced electronics technologies such as Digital Signal Processing dsp chip and extensive logic programmable CPLD chip to finish the ECU of AMT system design;
(2) have 20 road digital quantity I/O mouths, can finish handle button, reverse gear switch, neutral switch, high and low shift switch, lifting shelves button, throttle restriction bit switch, separate the collection of switching values such as brake switch, brake switch; And respectively engine speed, jack shaft rotating speed, output shaft rotating speed are gathered by Hall transducer and orthogonal encoder, calculate the rotating speed of three axles, for automaitc shfit provides the gear shift foundation;
(3) have 18 road analog quantity inputs, can finish 16 AD conversions analog sensors such as gas pedal, clutch pedal, gear shift handle, clutch displacement, air pressure, 3-axis acceleration, gear selectings;
(4) have the output of 16 road power switch pipes, can finish the control of selecting shift valve, high and low shift selector valve, clutch, throttle, coordinate to finish the automaitc shfit process;
(5) have two kinds of communication modes of CAN and RS-485, can communicate by letter with the upper-position unit debugging acid,, finish system debug the realtime monitoring of AMT system by the CAN bus; Communicate by letter with display modular by 485 buses, finish the real-time demonstration of current gear and gear shift handling position.
The invention has the beneficial effects as follows: simple in structure, easy to use, can guarantee the gear shift reliability of heavy-duty car, life-saving.
Description of drawings
Fig. 1 is the basic circuit diagram of the ECU of system;
Fig. 2 is the electrical equipment connection diagram of the ECU of system.
Wherein, 1. communication unit, 2.DSP chip, 3.CPLD chip, 4. analog sensor, 5. speed probe, 6. Boolean value output sensor, 7. transmission of vehicle.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Among Fig. 1, Fig. 2, the present invention includes the control circuit of forming by Digital Signal Processing dsp chip 2 and extensive logic programmable CPLD chip 3, the input end of control circuit connects with the vehicle detection unit, its output terminal is connected with transmission of vehicle 7, and control circuit also is connected with power supply with communication unit 1.
The analog sensor 4 of vehicle detection unit pack oil scraper door pedal, clutch pedal, gear shift handle, clutch displacement, air pressure, 3-axis acceleration, gear selecting, it is connected with dsp chip 2 input ends; The Boolean value output sensor 6 of handle button, reverse gear switch, neutral switch, high and low shift switch, lifting shelves button, throttle restriction bit switch, separation brake switch, brake switch, it is connected with CPLD chip 3 input ends; Motor, jack shaft, OSS 5, it is connected with CPLD chip 3 input ends.Engine speed, jack shaft rotating speed can be described as most important parameter in the AMT system, gear shift opportunity and gearshift procedure all with these two relating to parameters, therefore the accurate measurement to these two parameters is the key that the AMT system can normally move.The measurement of AMT system medium speed normally utilizes in the driving mechanism original gear to measure, speed probe 5 adopts magnetic resistance or Hall transducer to carry out, and be connected with orthogonal encoder, when gear rotates, along with the distance between gear teeth tips, backlash and the sensor changes, the output of sensor also changes, the sensor output signal shaping is got square signal after, when gear rotation is crossed a tooth, the square wave of output one-period.Because the diesel engine that heavy-duty car adopts is lower than petrol engine rotating speed, it is also limited to measure the number of teeth, and electric control mechanical type automatic speed variator is a real-time control system, sampling period is shorter, and each tooth of transmission gear is not identical, for overcoming this shortcoming, the mode of employing DSP+CPLD has designed a kind of dynamic multicycle detecting method and has carried out the measurement of rotating speed.
Because rotating speed can not suddenly change, acceleration and deceleration are slower, sampling period is short, N sampling period, CPLD chip 3 is according to the number of teeth M that turns in the preceding next sampling period of tachometer value estimation several times, and assign it to down counter, when first rising edge of measured signal arrives in one-period instantly, start down counter and begin counting, and start the high-speed counting clock simultaneously, what the rising edge that turns over the pulse that each tooth produces made down counter subtracts 1, when being kept to of down counter is zero, stop the counting of high-speed counting clock, flag bit is set, and the count value Z of high-speed counting clock is preserved wait CPLD chip 3 read, this moment, the count value Z of high-speed counting clock turned over M the time that tooth is required; At next cycle, CPLD chip 3 detects whether counter 1 is set flag bit, as then not adopting the speed in last cycle, not the counting initial value of refresh timing counter 1; Set flag bit if detect counter 1, then the count value z according to high speed timer counter clock 2 recomputates speed, and refreshes the counting initial value of down counter; The least count initial value of down counter is 1, and at this moment, measurement error is the count cycle of ± 1 high-speed counting clock; When the least count initial value M of down counter greater than 1 the time, the rotating speed that record this moment is a mean velocity of gear rotation being crossed a plurality of teeth, in this case, the square-wave cycle error of a tooth is ± count cycle of a 1/M high speed timer counter clock.Therefore, measuring accuracy is improved, and the smoothness of measurement result also is improved simultaneously.
Communication unit 1 adopts CAN and two kinds of communication modes of RS-485, can communicate by letter with the upper-position unit debugging acid by the CAN bus, to the realtime monitoring of AMT system, finishes system debug; Communicate by letter with display modular by 485 buses, finish the real-time demonstration of current gear and gear shift handling position.Because the CAN bus has stronger error correcting capability, support the difference transmitting-receiving, thereby suitable high-interference environment, and have transmission distance far away.Therefore, the CAN agreement is all very attractive for the distributed observing and controlling in many fields.At present the CAN bus has become one of the most promising bus standard.Therefore the ECU of this AMT system uses the CAN bus as its communication protocol, is convenient to carry out interconnected.
The The whole control circuit has 20 road digital quantity I/O mouths, finish handle button, reverse gear switch, neutral switch, high and low shift switch, lifting shelves button, throttle restriction bit switch, separate the collection of switching values such as brake switch, brake switch, and respectively engine speed, jack shaft rotating speed, output shaft rotating speed are gathered by Hall transducer and orthogonal encoder, calculate the rotating speed of three axles, for automaitc shfit provides the gear shift foundation; Have 18 road analog quantity inputs, can finish 16 AD conversions analog sensors such as gas pedal, clutch pedal, gear shift handle, clutch displacement, air pressure, 3-axis acceleration, gear selectings; Have the output of 16 road power switch pipes, can finish the control of selecting shift valve, high and low shift selector valve, clutch, throttle, coordinate to finish the automaitc shfit process.
DSP finished gas pedal in each cycle, clutch pedal, the gear shift handle, the clutch displacement, air pressure, 3-axis acceleration, the collection of analog sensors such as gear selecting, 16 AD conversions, with the handle button, reverse gear switch, neutral switch, the high and low shift switch, lifting shelves button, the throttle restriction bit switch, separate brake switch, the collection of switching values such as brake switch, in addition by Hall transducer and orthogonal encoder respectively to engine speed, the jack shaft rotating speed, the output shaft rotating speed is gathered, calculate the rotating speed of three axles, for automaitc shfit provides the gear shift foundation.
Control circuit selects shift valve, high and low shift selector valve according to the real-time status control of vehicle, coordinates to finish the automatic control of gearshift procedure.
Technological scheme of the present invention has been used for the ecp automatic transimission, realizes the Automatic Shift Control of vehicle.
Claims (5)
1. the ECU of AMT system of a heavy-duty car, it comprises power supply, it is characterized in that: further comprising the control circuit of forming by Digital Signal Processing dsp chip (2) and extensive logic programmable CPLD chip (3), the input end of control circuit connects with the vehicle detection unit, its output terminal is connected with transmission of vehicle (7), and control circuit also is connected with power supply with communication unit (1).
2. the ECU of AMT system of heavy-duty car according to claim 1, it is characterized in that: the analog sensor (4) of described vehicle detection unit pack oil scraper door pedal, clutch pedal, gear shift handle, clutch displacement, air pressure, 3-axis acceleration, gear selecting, they are connected with dsp chip (2) input end; Boolean value output sensors (6) such as handle button, reverse gear switch, neutral switch, high and low shift switch, lifting shelves button, throttle restriction bit switch, separation brake switch, brake switch, they are connected with CPLD chip (3) input end; Motor, jack shaft, OSS (5), they are connected with CPLD chip (3) input end.
3. the ECU of AMT system of heavy-duty car according to claim 2, it is characterized in that: described speed probe (5) has two classes, and transmission output shaft adopts the sensor with orthogonal coding output, and is connected with the quadrature decoder circuit, calculating output shaft rotating speed; Transmission input shaft and jack shaft adopt magnetic resistance or Hall transducer, they detect gear, along with the distance between gear teeth tips, backlash and the sensor changes, the output of sensor also changes, after the sensor output signal shaping got square signal, when gear rotation is crossed a tooth, the square wave of output one-period; CPLD chip (3) is according to the number of teeth M that turns in the preceding next sampling period of tachometer value estimation several times, and assign it to down counter, when first rising edge of measured signal arrives in one-period instantly, start down counter and begin counting, and start the high-speed counting clock simultaneously, what the rising edge that turns over the pulse that each tooth produces made down counter subtracts 1, when being kept to of down counter is zero, stop the counting of high-speed counting clock, flag bit is set, and the count value Z of high-speed counting clock is preserved wait CPLD chip (3) read, this moment, the count value Z of high-speed counting clock turned over M the time that tooth is required; At next cycle, CPLD chip (3) detects whether counter 1 is set flag bit, as then not adopting the speed in last cycle, not the counting initial value of refresh timing counter 1; Set flag bit if detect counter 1, then the count value z according to high speed timer counter clock 2 recomputates speed, and refreshes the counting initial value of down counter; The least count initial value of down counter is 1, and at this moment, measurement error is the count cycle of ± 1 high-speed counting clock; When the least count initial value M of down counter greater than 1 the time, the rotating speed that record this moment is a mean velocity of gear rotation being crossed a plurality of teeth, in this case, the square-wave cycle error of a tooth is ± count cycle of a 1/M high speed timer counter clock.
4. the ECU of AMT system of heavy-duty car according to claim 1, it is characterized in that: described communication unit (1) adopts CAN and two kinds of communication modes of RS-485, can communicate by letter with the upper-position unit debugging acid by the CAN bus,, finish system debug the realtime monitoring of AMT system; Communicate by letter with display modular by 485 buses, finish the real-time demonstration of current gear and gear shift handling position.
5. according to the ECU of AMT system of claim 1 or 2 or 3 described heavy-duty cars, it is characterized in that: described control circuit has 20 road digital quantity I/O mouths, finish handle button, reverse gear switch, neutral switch, high and low shift switch, lifting shelves button, throttle restriction bit switch, separate the collection of switching values such as brake switch, brake switch, and respectively engine speed, jack shaft rotating speed, output shaft rotating speed are gathered by Hall transducer and orthogonal encoder, calculate the rotating speed of three axles, for automaitc shfit provides the gear shift foundation; Have 18 road analog quantity inputs, can finish 16 AD conversions analog sensors such as gas pedal, clutch pedal, gear shift handle, clutch displacement, air pressure, 3-axis acceleration, gear selectings; Have the output of 16 road power switch pipes, can finish the control of selecting shift valve, high and low shift selector valve, clutch, throttle, coordinate to finish the automaitc shfit process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100148422A CN101109437A (en) | 2007-08-24 | 2007-08-24 | AMT system ECU of heavy-duty car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100148422A CN101109437A (en) | 2007-08-24 | 2007-08-24 | AMT system ECU of heavy-duty car |
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| CN101109437A true CN101109437A (en) | 2008-01-23 |
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| CNA2007100148422A Pending CN101109437A (en) | 2007-08-24 | 2007-08-24 | AMT system ECU of heavy-duty car |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102043386A (en) * | 2011-01-19 | 2011-05-04 | 中国重汽集团济南动力有限公司 | Digital heavy truck power output adjustment controller |
| CN103994212A (en) * | 2014-05-13 | 2014-08-20 | 陕西法士特齿轮有限责任公司 | System and method for monitoring range gear transmission gear |
| CN104141785A (en) * | 2014-06-27 | 2014-11-12 | 北京理工大学 | Fault diagnosis method and system for automatic shift control system of AMT (Automatic Mechanical Transmission) heavy vehicle |
| CN104455373A (en) * | 2014-11-13 | 2015-03-25 | 新乡市荣泰电器有限公司 | Shop truck digital gear controller |
| CN104633080A (en) * | 2013-11-12 | 2015-05-20 | 陕西国力信息技术有限公司 | Accelerator signal collecting circuit based on AMT system |
| CN104639106A (en) * | 2013-11-12 | 2015-05-20 | 陕西国力信息技术有限公司 | Signal generator based on AMT system detection |
| CN104632939A (en) * | 2013-11-12 | 2015-05-20 | 陕西国力信息技术有限公司 | Clutch main kernel control CPU based on AMT system |
| CN105229714A (en) * | 2013-03-13 | 2016-01-06 | 博世汽车服务解决方案公司 | There is the vehicle measuring equipment of SOC (system on a chip) device, sensor and wireless adapter |
| CN107525459A (en) * | 2016-06-21 | 2017-12-29 | 舍弗勒技术股份两合公司 | Clutch displacement monitoring system, PEPS system control device and clutch master cylinder |
-
2007
- 2007-08-24 CN CNA2007100148422A patent/CN101109437A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102043386A (en) * | 2011-01-19 | 2011-05-04 | 中国重汽集团济南动力有限公司 | Digital heavy truck power output adjustment controller |
| CN105229714A (en) * | 2013-03-13 | 2016-01-06 | 博世汽车服务解决方案公司 | There is the vehicle measuring equipment of SOC (system on a chip) device, sensor and wireless adapter |
| CN107015933A (en) * | 2013-03-13 | 2017-08-04 | 博世汽车服务解决方案公司 | Vehicle measuring apparatus with on-chip system device, sensor and wireless adapter |
| CN104633080A (en) * | 2013-11-12 | 2015-05-20 | 陕西国力信息技术有限公司 | Accelerator signal collecting circuit based on AMT system |
| CN104639106A (en) * | 2013-11-12 | 2015-05-20 | 陕西国力信息技术有限公司 | Signal generator based on AMT system detection |
| CN104632939A (en) * | 2013-11-12 | 2015-05-20 | 陕西国力信息技术有限公司 | Clutch main kernel control CPU based on AMT system |
| CN103994212A (en) * | 2014-05-13 | 2014-08-20 | 陕西法士特齿轮有限责任公司 | System and method for monitoring range gear transmission gear |
| CN104141785A (en) * | 2014-06-27 | 2014-11-12 | 北京理工大学 | Fault diagnosis method and system for automatic shift control system of AMT (Automatic Mechanical Transmission) heavy vehicle |
| CN104455373A (en) * | 2014-11-13 | 2015-03-25 | 新乡市荣泰电器有限公司 | Shop truck digital gear controller |
| CN107525459A (en) * | 2016-06-21 | 2017-12-29 | 舍弗勒技术股份两合公司 | Clutch displacement monitoring system, PEPS system control device and clutch master cylinder |
| CN107525459B (en) * | 2016-06-21 | 2021-06-25 | 舍弗勒技术股份两合公司 | Clutch displacement monitoring system, PEPS system control device and clutch master cylinder |
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