CN103452676A - Engine exhaust brake control system and control method - Google Patents

Engine exhaust brake control system and control method Download PDF

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Publication number
CN103452676A
CN103452676A CN201310412021XA CN201310412021A CN103452676A CN 103452676 A CN103452676 A CN 103452676A CN 201310412021X A CN201310412021X A CN 201310412021XA CN 201310412021 A CN201310412021 A CN 201310412021A CN 103452676 A CN103452676 A CN 103452676A
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brake
exhaust
control unit
valve
control
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CN201310412021XA
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CN103452676B (en
Inventor
连静
李海波
李琳辉
周雅夫
黄海洋
王蒙蒙
化玉伟
孙永朝
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Dalian University of Technology
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Dalian University of Technology
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The invention discloses an engine exhaust brake control system and a control method. According to the invention, in the automatic exhaust brake opening control process, under the brake state and the condition that a clutch is not separated, a control unit is used for collecting an engine rotation speed and a brake disc temperature signal, when the engine rotation speed is lower than a set limiting value and the brake disc temperature exceeds a set limiting value, the control unit controls an electromagnetic valve to act, so as to realize automatic closing of a butterfly valve; in the pressure regulation feedback control process, after the butterfly valve is closed, the control unit collects an exhaust pipe back pressure signal, and when the exhaust pipe back pressure exceeds a limiting value, the control unit controls the butterfly valve to be opened, and after the pressure is reduced, the automatic exhaust brake opening control process is performed again; in the automatic exhaust brake completing process, when the control unit collects any signal that a driver steps on a clutch pedal or an accelerator pedal or the driver loosens a brake pedal, the butterfly valve is opened, and the exhaust brake is ended. According to the invention, automatic control about exhaust brake is realized, the control accuracy is high, secondary opening of an exhaust valve is avoided, and the braking efficiency is improved.

Description

A kind of engine exhaust and brake control system and controlling method
Technical field
The invention belongs to the Modern Transportation Technology field, relate to a kind of auxiliary braking system, specially refer to a kind of exhaust emission control system of engine and controlling method.
Background technique
Automobile travels or expressway and avenue while travelling at climb and fall, often need to carry out the braking of varying strength frequently, raise and cause that braking ability descends or lost efficacy for fear of braking system Yin Wendu, at present a lot of vehicles are all set up auxiliary braking system, to help vehicle to underspeed or to keep velocity-stabilization, thereby improve Braking efficiency.
What existing exhaust auxiliary braking adopted is bang-bang control, by the driver, presses switch button, and electromagnetic valve work makes the exhaust brake cylinder promote rocking arm, drives butterfly valve and closes, and exhaust brake is opened, and lights work indicator light simultaneously.Because this traditional mechanism needs driver's Self-operating, in braking process, often may forget and press the exhaust brake button, only adopt foundation brakes braking, increase its working strength, shortened foundation brakes working life.
Traditional exhaust auxiliary braking is when work, and due to closing of exhaust butterfly valve, the back pressure in outlet pipe increases gradually, finally can overcome initial tension of spring, back down exhaust valve, exhaust valve secondary opening phenomenon occur, make auxiliary braking usefulness descend, can shorten the working life of exhaust valve parts simultaneously.
Summary of the invention
The problems referred to above that exist for solving prior art, the present invention will design a kind of can realize automatically controlling and effectively avoiding exhaust emission control system of engine and the controlling method of exhaust valve secondary opening phenomenon.
To achieve these goals, technological scheme of the present invention is as follows: a kind of engine exhaust and brake control system, comprise signal gathering unit, control unit and actuator, described signal gathering unit comprises brake pedal position sensor, clutch position sensor, engine rotation speed sensor, the brake disc temperature transducer, high-temp pressure sensor and throttle position sensor, described control unit is microprocessor, the information collected for analysis and processing unit, described actuator comprises the exhaust brake cylinder, rocker arm body, fly valve, solenoid valve, gas receiver and compressor, described brake pedal position sensor, clutch position sensor, engine rotation speed sensor, brake disc temperature transducer and throttle position sensor are connected on control unit by car load CAN bus, control unit is connected with the high-temp pressure sensor of fly valve front end simultaneously, for gathering pressure data, control unit is connected with the electromagnetic valve end, for the conducting of controlling solenoid valve with close, one termination exhaust brake cylinder of solenoid valve valve port, another termination gas receiver, gas receiver is connected with compressor, for to gas receiver, providing pressurized gas, the exhaust brake cylinder is connected with fly valve by rocker arm body, fly valve is arranged on outlet pipe inside.
A kind of controlling method of engine exhaust and brake control system comprises the following steps:
A, exhaust brake are opened control automatically: during braking, at clutch, not under separated state, control unit gathers engine rotation speed sensor information and brake disc temperature sensor information, when engine speed passes lower than setting limit value n minthe time, the brake disc temperature surpasses setting limit value T simultaneously max, now control unit is controlled the valve core of the electromagnetic valve action, makes exhaust brake cylinder and gas receiver connect, and gas receiver is by the compressor supplying compressed gas, and the motion of gas push master cylinder inner carrier, drive rocking arm and rotate, and realizes that the exhaust butterfly valve cuts out automatically;
B, pressure regulation feedback control: for fear of exhaust valve secondary opening situation, the high-temp pressure sensor Real-Time Monitoring outlet pipe back pressure of fly valve front end, be transferred to control unit to signal, and back pressure does not surpass limit value p maxthe time, keep butterfly valve in closed condition; When the back pressure value surpasses p maxthe time, control unit is controlled the valve core of the electromagnetic valve action, brake cylinder exhaust, and fly valve is opened, and discharges the high pressure in outlet pipe, and after pressure drop, the exhaust brake that again enters steps A is opened control procedure automatically;
C, the automatic finishing control of exhaust brake: when driver's stepping on clutch pedal or gas pedal or while loosening the brake, clutch position sensor, throttle position sensor and brake pedal position sensor are given control unit communication, as long as control unit collects any one signal in three sensors, will control the valve core of the electromagnetic valve action, make the exhaust brake cylinder communicate with atmosphere, discharge pressurized gas in master cylinder, simultaneously under the effect of return spring, valve is opened automatically, and exhaust brake finishes.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention is directed to the shortcoming that the available engine exhaust brake can not be controlled automatically, gather clutch position sensor, brake pedal position sensor, brake disc temperature transducer and engine rotation speed sensor signal by control unit, according to these signaling control unit analysis judgement foundation brakes braking state and Braking efficiency, thereby control the braking fly valve, automatically open and close.
2, because having adopted at the fly valve front end, the present invention installs high-temp pressure sensor additional, pressure between control unit Real-time Collection fly valve and exhaust valve, by the pressure regulation feedback control, solved exhaust valve secondary opening problem, make Braking efficiency increase, can extend the working life of foundation brakes and exhaust valve parts.
The accompanying drawing explanation
Fig. 1 is exhaust brake control system structural representation.
Fig. 2 is exhaust brake control unit control flow.
In figure: 1, exhaust brake cylinder; 2, rocker arm body; 3, fly valve; 4, compressor; 5, gas receiver; 6, solenoid valve; 7, control unit; 8, high-temp pressure sensor; 9, outlet pipe; 10, brake pedal position sensor; 11, clutch position sensor; 12, engine rotation speed sensor; 13, brake disc temperature transducer; 14, throttle position sensor.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with technological scheme and accompanying drawing.
Embodiment
The present invention is comprised of signal gathering unit, control unit 7 and actuator's three parts, as shown in Figure 1.Signal acquisition part divides and comprises brake pedal position sensor 10, clutch position sensor 11, engine rotation speed sensor 12, brake disc temperature transducer 13, high-temp pressure sensor 8 and throttle position sensor 14.Control unit 7 is microprocessor, the information can analysing and processing collected.Actuator comprises that exhaust brake cylinder 1, rocker arm body 2, fly valve 3, compressor 4, gas receiver 5 and solenoid valve 6 form.
Control procedure of the present invention comprises that exhaust brake opens automatic finishing control three parts of control, pressure regulation feedback control and exhaust brake automatically.Concrete control flow as described in Figure 2.
As depicted in figs. 1 and 2, exhaust brake is opened control automatically: control unit 7 judges that by brake pedal position sensor 10 whether automobile is in braking state, judge that by clutch position sensor 11 whether clutch is in jointing state again, when automobile in non-braking state or clutch in separated state, keep exhaust brake butterfly valve 3 to open.When in braking state and clutch in conjunction with the time, the engine speed that now engine rotation speed sensor 12 detects under braking states, control unit 7 receives these signals, judge that whether engine speed is lower than setting limit value n min; Gather brake disc temperature transducer 13 information simultaneously, judge whether temperature surpasses setting limit value T max, when rotating speed surpasses limit value lower than limit value and brake disc temperature, control unit 7 is controlled the action of solenoid valve 6 spools, thereby controls the compressed gas flow direction, promotes master cylinder 1 inner carrier motion, drives rocker arm body 2, realizes automatically closing of fly valve 3.If engine speed, higher than setting limit value or brake disc temperature lower than setting limit value, keeps butterfly valve 3 to open.
The pressure regulation feedback control: after exhaust brake fly valve 3 cuts out, along with the running of motor, the pressure in outlet pipe increases gradually, from formula (1),
p max π ( d v 2 - d 0 2 ) 4 = p π d v 2 4 + F - - - ( 1 )
Wherein, p means the pressure in cylinder;
P maxmean that exhaust valve is to the back pressure between butterfly valve;
D vmean the exhaust valve diameter;
D 0mean exhaust valve gas shank diameter;
F means the valve spring pretightening force;
When pressure surpasses p maxafter, can overcome initial tension of spring, back down exhaust valve, exhaust valve secondary opening phenomenon appears, exhaust brake usefulness descends.For fear of this situation, the pressure transducer 8 Real-Time Monitoring outlet pipe back pressures of high temperature, be transferred to control unit 7 to signal, when force value surpasses p maxthe time, control unit 7 is controlled solenoid valve 6 spool actions, master cylinder 1 exhaust, and fly valve 3 is opened under the return spring effect, and the high pressure in releasing tube, after pressure drop, again enter above-mentioned exhaust brake and automatically open control procedure.
The automatic finishing control of exhaust brake: when driver's let slip the clutch or gas pedal or loosen the brake, clutch position sensor 11, throttle position sensor 14 and brake pedal position sensor 13 will be transferred to control unit to signal, as long as control unit 7 receives any one signal in three sensors, will control solenoid valve 6 spool actions, pressurized gas in releasing brake cylinder 1, exhaust brake dish valve 3 is opened under the effect of return spring, and exhaust brake finishes.

Claims (2)

1. an engine exhaust and brake control system, is characterized in that: comprise signal gathering unit, control unit (7) and actuator, described signal gathering unit comprises brake pedal position sensor (10), clutch position sensor (11), engine rotation speed sensor (12), brake disc temperature transducer (13), high-temp pressure sensor (8) and throttle position sensor (14), described control unit (7) is microprocessor, the information collected for analysis and processing unit, described actuator comprises exhaust brake cylinder (1), rocker arm body (2), fly valve (3), solenoid valve (6), gas receiver (5) and compressor (4), described brake pedal position sensor (10), clutch position sensor (11), engine rotation speed sensor (12), brake disc temperature transducer (13) and throttle position sensor (14) are connected on control unit (7) by car load CAN bus, control unit (7) is connected with the high-temp pressure sensor (8) of fly valve (3) front end simultaneously, for gathering pressure data, control unit (7) is connected with solenoid valve (6) control end, for the conducting of controlling solenoid valve (6) with close, one termination exhaust brake cylinder (1) of solenoid valve (6) valve port, another termination gas receiver (5), gas receiver (5) is connected with compressor (4), for giving gas receiver (5), provides pressurized gas, exhaust brake cylinder (1) is connected with fly valve (3) by rocker arm body (2), fly valve (3) is arranged on outlet pipe (9) inside.
2. the controlling method of an engine exhaust and brake control system as claimed in claim 1 is characterized in that: comprise the following steps:
A, exhaust brake are opened control automatically: during braking, at clutch, not under separated state, control unit (7) gathers engine rotation speed sensor (12) information and brake disc temperature transducer (13) information, when engine speed passes lower than setting limit value n minthe time, the brake disc temperature surpasses setting limit value T simultaneously max, now control unit (7) is controlled the action of solenoid valve (6) spool, makes exhaust brake cylinder (1) and gas receiver (5) connect, gas receiver (5) is by compressor (4) supplying compressed gas, gas push master cylinder inner carrier motion, drive rocking arm and rotate, and realizes that the exhaust butterfly valve cuts out automatically;
B, pressure regulation feedback control: for fear of exhaust valve secondary opening situation, high-temp pressure sensor (8) Real-Time Monitoring outlet pipe (9) back pressure of fly valve (3) front end, be transferred to control unit (7) to signal, and back pressure does not surpass limit value p maxthe time, keep butterfly valve in closed condition; When the back pressure value surpasses p maxthe time, control unit (7) is controlled the action of solenoid valve (6) spool, brake cylinder exhaust, and fly valve (3) is opened, and discharges the high pressure in outlet pipe (9), and after pressure drop, the exhaust brake that again enters steps A is opened control procedure automatically;
C, the automatic finishing control of exhaust brake: when driver's stepping on clutch pedal or gas pedal or while loosening the brake, clutch position sensor (11), throttle position sensor (14) and brake pedal position sensor (10) are given control unit (7) communication, control unit (7) is as long as collect any one signal in three sensors, will control the action of solenoid valve (6) spool, make exhaust brake cylinder (1) communicate with atmosphere, discharge pressurized gas in master cylinder, simultaneously under the effect of return spring, valve is opened automatically, exhaust brake finishes.
CN201310412021.XA 2013-09-11 2013-09-11 A kind of engine exhaust and brake control system and controlling method Expired - Fee Related CN103452676B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104121108A (en) * 2014-07-03 2014-10-29 潍柴动力股份有限公司 Diesel engine compressing, releasing and braking control method, device and system
CN104481706A (en) * 2014-12-09 2015-04-01 重庆电讯职业学院 Automatic energy-saving device for automotive pneumatic braking
CN105508058A (en) * 2015-12-07 2016-04-20 潍柴动力股份有限公司 Assisted brake overspeed warning method and device applicable to electric-control engine
CN106285941A (en) * 2016-08-31 2017-01-04 潍柴动力股份有限公司 A kind of brakes detection method, device and brake switch
CN107747516A (en) * 2017-09-29 2018-03-02 杰锋汽车动力系统股份有限公司 A kind of gas extraction system exhaust structure and its control method
CN108798843A (en) * 2018-05-31 2018-11-13 安徽江淮汽车集团股份有限公司 A kind of vehicle exhaust system
CN109356729A (en) * 2018-11-08 2019-02-19 潍柴西港新能源动力有限公司 A kind of exhaust brake butterfly valve control system and control method
CN110700948A (en) * 2017-07-01 2020-01-17 吴小再 Vehicle braking method

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CN101484677A (en) * 2006-07-13 2009-07-15 沃尔沃拉斯特瓦格纳公司 Method and system for operating a combustion engine brake
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JP2012097604A (en) * 2010-10-29 2012-05-24 Isuzu Motors Ltd Method and device for controlling exhaust brake of internal combustion engine
CN103061895A (en) * 2012-12-31 2013-04-24 鲁东大学 Intelligent control system and control method for continuous adjustment of automobile exhaust brake braking force

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JPH09228854A (en) * 1996-02-21 1997-09-02 Hino Motors Ltd Auxiliary brake device of internal combustion engine
JP2002242705A (en) * 2001-02-19 2002-08-28 Nissan Diesel Motor Co Ltd Auxiliary brake mechanism
CN101484677A (en) * 2006-07-13 2009-07-15 沃尔沃拉斯特瓦格纳公司 Method and system for operating a combustion engine brake
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104121108A (en) * 2014-07-03 2014-10-29 潍柴动力股份有限公司 Diesel engine compressing, releasing and braking control method, device and system
CN104121108B (en) * 2014-07-03 2017-03-08 潍柴动力股份有限公司 A kind of diesel engine compression release brake control method, apparatus and system
CN104481706A (en) * 2014-12-09 2015-04-01 重庆电讯职业学院 Automatic energy-saving device for automotive pneumatic braking
CN105508058A (en) * 2015-12-07 2016-04-20 潍柴动力股份有限公司 Assisted brake overspeed warning method and device applicable to electric-control engine
CN106285941A (en) * 2016-08-31 2017-01-04 潍柴动力股份有限公司 A kind of brakes detection method, device and brake switch
CN106285941B (en) * 2016-08-31 2019-03-08 潍柴动力股份有限公司 A kind of braking system detection method, device and brake switch
CN110700948A (en) * 2017-07-01 2020-01-17 吴小再 Vehicle braking method
CN107747516A (en) * 2017-09-29 2018-03-02 杰锋汽车动力系统股份有限公司 A kind of gas extraction system exhaust structure and its control method
CN108798843A (en) * 2018-05-31 2018-11-13 安徽江淮汽车集团股份有限公司 A kind of vehicle exhaust system
CN109356729A (en) * 2018-11-08 2019-02-19 潍柴西港新能源动力有限公司 A kind of exhaust brake butterfly valve control system and control method
CN109356729B (en) * 2018-11-08 2024-02-09 潍柴西港新能源动力有限公司 Exhaust brake butterfly valve control system and control method

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