CN103742272A - Exhaust braking control system of natural gas engine - Google Patents
Exhaust braking control system of natural gas engine Download PDFInfo
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- CN103742272A CN103742272A CN201310503977.0A CN201310503977A CN103742272A CN 103742272 A CN103742272 A CN 103742272A CN 201310503977 A CN201310503977 A CN 201310503977A CN 103742272 A CN103742272 A CN 103742272A
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- exhaust
- switch
- exhaust brake
- exhaust braking
- natural gas
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Abstract
The invention discloses an exhaust braking control system of a natural gas engine. An accelerator interlocking request switch (1), an exhaust braking request switch (3) and a gearbox neutral gear switch (4) are arranged on an automobile with the natural gas engine, one end of the switch is connected with the signal input end of an ECU (5), and after the exhaust braking request switch (3) is connected with a clutch switch (2) in series, one end of the exhaust braking request switch (3) is connected into the signal input end of the ECU, one end of the gearbox neutral gear switch (4) is connected into the signal input end of the ECU, and the other ends of three parallel circuits are connected with a key switch ON gear (6). The key switch ON gear is further connected with a coil (8) of an exhaust braking replay (7), and the other end of the coil is connected with the signal output end of the ECU. One end of a normally open contact (9) of the exhaust brake relay is connected with an engine general power (10), the other end of the normally open contact (9) is connected with an exhaust braking solenoid valve (11), and the exhaust braking solenoid valve is connected with an execution device. Exhaust braking is safe and reliable to implement.
Description
Technical field
The present invention is applicable to rock gas cargo vehicle auxiliary braking control technique.
Background technique
According to the passenger vehicle that requires vehicle commander to be greater than 9 meters in GB7258-2012, tractor truck and gross mass are more than or equal to lorry and the dangerous transport vehicle of 1200Kg all should equip retarder or other complemental brake system.Conventionally the general car brakeing of using vapour, diesel oil to be used as power all can adopt vapour to stop, and the devices such as water brake, also can adopt exhaust brake as auxiliary braking.While needing exhaust brake, by a valve, turn-off outlet pipe, make waste gas enter engine compartment, thereby cause the vexed car Hoist braking of motor effect, but natural gas engine is different from vapour, diesel engine completely.At natural gas engine duration of work, engine intake manifold is full of burning mixture, and in exhaust brake process, because exhaust back pressure is very large, in braking process, exhaust back pressure may be opened the recoil of exhaust valve air-flow, in intake stroke, air-flow can be back to suction tude etc., therefore it is unreliable slightly to control, just there will be tempering or in exhaust brake process, because user's level is uneven, various motor applying working condition complexity, motor still turns round and brings uncertain risk, so simply cut off combustion gas control, can not meet safe requirement completely, therefore to make natural gas engine safe handling exhaust brake as auxiliary braking means, must consider many factors, each parts of guaranteeing control system function that gives mutual protection, therefore the research of this respect is useful.
Summary of the invention
The object of the present invention is to provide one can overcome known technology shortcoming, can safety, reliably for the technology of natural gas engine exhaust brake control system.
For achieving the above object, the solution of the present invention is: a kind of natural gas engine exhaust brake control system arranges throttle interlock request switch, by one end access ECU signal input part of this switch on natural gas engine automobile; Exhaust brake request switch is set, is connected in series and accesses ECU signal input part with clutch switch; Transmission neutral switch is set, by this switch one end and access ECU signal input part; Article three, also the other end of link is connected with car load key operation ON shelves, described key operation ON shelves are connected with coil one end of exhaust brake relay again, the other end of relay coil is connected with the upper exhaust brake control signal output terminal of ECU, normally open contact one end and the motor general power of exhaust brake relay are joined, the other end is connected with exhaust braking electromagnetic valve positive pole, exhaust braking electromagnetic valve the other end ground connection, described exhaust braking electromagnetic valve is connected with an actuating device.
Further scheme comprises: described actuating device is connected to a gas receiver before being included in the inlet end of exhaust braking electromagnetic valve, solenoid valve is given vent to anger and is connected to an exhaust brake cylinder by pipeline, the piston rod front end of exhaust brake cylinder joins by leverage and an exhaust braking valve, in the outlet pipe of exhaust braking valve access automobile, utilize the break-make of the valve opening and closing control outlet pipe of exhaust braking valve.
Adopt such scheme, due to when carrying out exhaust brake, considered associated multiple interlocking condition, these conditions can not interfere with each other, and restriction realizes exhaust brake, thus the exhaust brake of this programme to carry out be safe, reliably, thus realized object of the present invention.
Below in conjunction with diagram and embodiment, scheme is described in more detail.
Accompanying drawing explanation
Fig. 1 is natural gas engine automobile exhaust brake control system schematic diagram;
Fig. 2 is actuator's schematic diagram of control system in Fig. 1.
Embodiment
As shown in Figure 1, for realizing natural gas engine exhaust brake, throttle interlock switch 1 is housed on automobile, clutch switch 2, exhaust brake request switch 3, and neutral switch 4, these switch combinations are got up and a control system of the common composition of vehicle-mounted computer ECU5, for ease of making the circuti diagram as Fig. 1, all switches all represent with the symbol of switch off state, as shown in Figure 1, one end of throttle interlock switch 1 is connected with a signal input part of ECU5, clutch switch 2 after being connected in series with exhaust brake request switch 3 again with a signal input part of ECU5 and connect, a signal input part of one end of neutral switch 4 and ECU5 also connects, form altogether three and the signal input part that connects, and the other end of wiring and key operation ON shelves 6 join, this is operator cabin key operation, when key operation represents power connection in ON shelves, otherwise deenergization.
Described key operation ON shelves 6 are also connected with one end of the coil 8 of an exhaust brake relay 7, and the other end of coil 8 is connected with an exhaust brake control signal output terminal of ECU5.Exhaust brake relay with one end sending and receiving motivation general power 10 of a normally open contact 9, the other end connects exhaust braking electromagnetic valve 11, forms a closed circuit.
Circuti diagram design principle is as shown in Figure 1: for successfully realizing exhaust brake, only passive cut-out combustion gas control can not meet security requirement completely, must introduce ACTIVE CONTROL measure, guarantees that the each parts of control system have interlock protection function.So-called interlocking represents, make 1 online output signal of throttle interlock switch, unclamps throttle, and throttle interlock switch 1 closure, unclamps throttle, while being illustrated in not to motor air feed, just allows to start exhaust brake; Not disengage the clutch, while representing that clutch does not transmit Engine torque, clutch switch 2 closures, allow exhaust brake, and should be closed by the exhaust brake switch of driver's operation, represent to allow to carry out exhaust brake operation, clutch switch 2 is connected in series online just signal transmission to ECU5 with exhaust brake request switch 3; Neutral switch 4 closures, gearbox, in band file location, is illustrated in exhaust brake operating process, and gearbox must be in band shelves state.When the signal end of ECU5 is met a cassation three kinds of conditions, through calculating, the condition maturity of exhaust brake is carried out in judgement, so send signal by output terminal supply and exhaust braking relay 7, so line conduction at relay coil 8 places, the normally open contact of relay 79 is sucted to this circuit of conducting, and supply and exhaust braking electromagnetic valve 11 is powered by power supply 10, and exhaust braking electromagnetic valve and an actuating device join.
Actuating device is as shown in Figure 2 by a gas receiver 12, gas receiver 12 joins by pipeline and solenoid valve 11 inlet ends, outlet side joins by pipeline and an exhaust brake cylinder 13, middle valve is controlled by solenoid valve 11, valve is opened, gas receiver 12 with gas by pipeline, enter exhaust brake cylinder 13, valve closes, and gas disconnects, and is the pressurized air prestoring in gas receiver 12.Exhaust brake cylinder 13 is with cylinder and piston, piston rod 14 is connected with a leverage 15, leverage is connected with an exhaust braking valve 16, the valve that leverage makes exhaust braking valve 16 along valve with rotating shaft rotate, valve closing or open, the pipe ends of described exhaust braking valve 16 is access in air outlet duct system, utilize valve closing or open, valve closing is carried out exhaust brake operation, waste gas as previously mentioned carries out motor air chamber, thereby cause the vexed car of motor to reach braking effect, valve open, realize the function from outlet pipe combustion gas normally.
Adopt technique scheme, can produce exhaust brake as auxiliary braking, due to the existing throttle of motor, clutch, the working state of gearbox obtains interlocking and controls, can not produce with each other interference, affect exhaust brake, realized the technical requirements of NBS, this device is easy to operate, effectively simple, use exhaust brake, can reduce sideslip, when lower long slope, can reduce the number of times of service brake, reduce the temperature rise of brake drum, improve the reliability of braking, use exhaust brake, can reduce the supply of motor oil plant so that oil-break, saved fuel.
Claims (3)
1. a natural gas engine exhaust brake control system, it is characterized in that: throttle interlock request switch (1) is set on natural gas engine automobile, one termination ECU(5 of described switch) signal input part, one exhaust brake request switch (3), be connected in series rear one end with a clutch switch (2) and access ECU signal input part, a transmission neutral switch (4), ECU signal input part is also accessed in one end, article three, also the other end of link is connected with key operation ON shelves (6), described key operation ON shelves are also connected with the coil (8) of an exhaust brake relay (7), the other end of coil is connected with an exhaust brake control signal output terminal of ECU, normally open contact (9) one end and the motor general power (10) of exhaust brake relay are joined, one end and exhaust braking electromagnetic valve (11) join, described exhaust braking electromagnetic valve is connected with an actuating device.
2. a kind of natural gas engine exhaust brake control system according to claim 1, it is characterized in that: the inlet end that described actuating device is included in exhaust braking electromagnetic valve is connected to a gas receiver (12), solenoid valve outlet side is connected to an exhaust brake cylinder (13) by pipeline, piston rod (14) front end of exhaust brake cylinder joins by leverage (15) and an exhaust braking valve (16), in the outlet pipe of exhaust braking valve access automobile, utilize the break-make of the valve opening and closing control outlet pipe of exhaust braking valve.
3. a kind of natural gas engine exhaust brake control system according to claim 2, is characterized in that: in gas receiver (12), be the pressurized air prestoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310503977.0A CN103742272A (en) | 2013-10-24 | 2013-10-24 | Exhaust braking control system of natural gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310503977.0A CN103742272A (en) | 2013-10-24 | 2013-10-24 | Exhaust braking control system of natural gas engine |
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| Publication Number | Publication Date |
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| CN103742272A true CN103742272A (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310503977.0A Pending CN103742272A (en) | 2013-10-24 | 2013-10-24 | Exhaust braking control system of natural gas engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649784A (en) * | 2016-03-28 | 2016-06-08 | 江阴职业技术学院 | Engine exhaust throttling device and method for auxiliary braking of heavy truck |
| CN107035541A (en) * | 2015-08-06 | 2017-08-11 | 湖南汽车制造有限责任公司 | A kind of engine exhaust and brake inter-linked controlling method and system |
| CN111448377A (en) * | 2017-12-14 | 2020-07-24 | 博世株式会社 | Electronic control device and exhaust gate control device |
| CN112154263A (en) * | 2018-02-28 | 2020-12-29 | 博世株式会社 | ECU and exhaust brake control device |
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| US20020174654A1 (en) * | 2001-05-22 | 2002-11-28 | Zhou Yang | Method and system for engine braking in an internal combustion engine with exhaust pressure regulation and turbocharger control |
| CN202132116U (en) * | 2011-06-30 | 2012-02-01 | 东风汽车有限公司 | Exhaust brake device for natural gas automobile |
| JP2012097604A (en) * | 2010-10-29 | 2012-05-24 | Isuzu Motors Ltd | Method and device for controlling exhaust brake of internal combustion engine |
| CN203011697U (en) * | 2012-09-27 | 2013-06-19 | 徐州重型机械有限公司 | Exhaust brake control device for vehicle climbing simulation test |
| CN203098057U (en) * | 2012-12-31 | 2013-07-31 | 鲁东大学 | Braking force stepless adjustment intelligent control system of automobile exhaust brake |
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2013
- 2013-10-24 CN CN201310503977.0A patent/CN103742272A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020174654A1 (en) * | 2001-05-22 | 2002-11-28 | Zhou Yang | Method and system for engine braking in an internal combustion engine with exhaust pressure regulation and turbocharger control |
| JP2012097604A (en) * | 2010-10-29 | 2012-05-24 | Isuzu Motors Ltd | Method and device for controlling exhaust brake of internal combustion engine |
| CN202132116U (en) * | 2011-06-30 | 2012-02-01 | 东风汽车有限公司 | Exhaust brake device for natural gas automobile |
| CN203011697U (en) * | 2012-09-27 | 2013-06-19 | 徐州重型机械有限公司 | Exhaust brake control device for vehicle climbing simulation test |
| CN203098057U (en) * | 2012-12-31 | 2013-07-31 | 鲁东大学 | Braking force stepless adjustment intelligent control system of automobile exhaust brake |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035541A (en) * | 2015-08-06 | 2017-08-11 | 湖南汽车制造有限责任公司 | A kind of engine exhaust and brake inter-linked controlling method and system |
| CN105649784A (en) * | 2016-03-28 | 2016-06-08 | 江阴职业技术学院 | Engine exhaust throttling device and method for auxiliary braking of heavy truck |
| CN105649784B (en) * | 2016-03-28 | 2018-10-26 | 江阴职业技术学院 | Engine exhaust throttling set and method for heavy motor truck auxiliary braking |
| CN111448377A (en) * | 2017-12-14 | 2020-07-24 | 博世株式会社 | Electronic control device and exhaust gate control device |
| CN112154263A (en) * | 2018-02-28 | 2020-12-29 | 博世株式会社 | ECU and exhaust brake control device |
| CN112154263B (en) * | 2018-02-28 | 2022-12-02 | 博世株式会社 | ECU and exhaust brake control device |
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Application publication date: 20140423 |