CN208831060U - A kind of electromagnetic control type engine braking apparatus - Google Patents
A kind of electromagnetic control type engine braking apparatus Download PDFInfo
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- CN208831060U CN208831060U CN201821470043.6U CN201821470043U CN208831060U CN 208831060 U CN208831060 U CN 208831060U CN 201821470043 U CN201821470043 U CN 201821470043U CN 208831060 U CN208831060 U CN 208831060U
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- engine braking
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Abstract
A kind of electromagnetic control type engine braking apparatus.It is characterized by: the operating position of ECU electronic control unit detection camshaft, the information that BCU brak control unit transmits ECU electronic control unit is handled, calculate the operation interval of corresponding electromagnetic controller, control electromagnetic controller drive control mechanism executes movement, one electromagnetic controller drives a control mechanism job, when camshaft rotates a circle, each electromagnetic controller is sequentially completed movement.The advantage is that, which can greatly promote engine braking, enters into and exits from speed, and system is stable and reliable in work.
Description
Technical field
The utility model is applied on medium and heavy diesel oil and natural gas engine, and a kind of electromagnetic control type engine is provided
Brake apparatus.
Background technique
China mountain range is numerous, and mountain area area is vast, accounts for about the 69% of territory total area, heavy goods vehicle is in the long downhill path in mountain area
Section, driver frequently use service brake, and large energy can be absorbed in running brake in a short time, but with braking time
Increase, surface of friction pair temperature between brake drum and shoe brake increases, and coefficient of friction reduces, and ultimately causes brake efficiency
The decline even unsafe condition of brake failure cause major traffic accidents.In order to improve the driving safety of heavy type commercial automobile,
It needs to increase auxiliary braking system on the basis of service brake, to guarantee vehicle during descending with sustained
Brake force.
Automobile-used auxiliary braking system is broadly divided into two classes: retarder and engine braking system.Engine braking system by
It is used widely the advantages that its structure is simple, easy for installation, cheap.
Engine braking technology refers to that driver lifts accelerator pedal in vehicle traveling process, loosens the clutch, and utilizes hair
Generated resistance to compression pression and intake and exhaust resistance and frictional force are formed by braking masterpiece to driving wheel in motivation compression travel
With being allowed to brake automobile.Engine braking technology is divided into Compression Engine braking, deflation type engine braking and portion
Divide three kinds of deflation type engine braking.Compression Engine braking is to open exhaust valve or auxiliary gas near
Door；Deflation type engine braking is to open exhaust valve in entire cycle of engine；Part deflation type engine braking is to start
Most of stroke of machine circulation opens exhaust valve.The application of engine braking technology efficiently reduces using frequently for running brake
Rate, vehicle, using engine braking, can use braking at precipitous road surfaces such as lower long slope, rugged hill paths to avoid because of long-time
Device causes the temperature of brake bush to increase, and declines brake force or even ineffective.
Engine braking apparatus is capable of providing one or multiple auxiliary valve lifts, for realizing engine braking function
Energy.Have multiple utility model patents at present and be related to the application of technique, it includes volume that major technique, which is outside the main lift of cam,
Outer one or several auxiliary lifts, can also increase a cam dedicated for braking and be started according to the needs of engine operation
Machine braking device makes auxiliary lifts work and (realize engine braking function) or it is made not work.
Patent CN200980158946.8 is the dedicated rocker arm h type engine h system of Jacobs Vehicle Systems Inc.'s application
Dynamic device, the utility model disclose a kind of system for driving engine exhaust port, and the system is in solenoid valve or other automatically controlled
Under the control of valve, hydraulic fluid can be selectively supplied control valve and actuating plunger.Solenoid valve is mountable on camb cap
And hydraulic path may be disposed in engine cylinder cover and/or camb cap, to the control fluid feed passage in rocker arm shaft
Hydraulic fluid is provided.By opening and closing solenoid valve, hydraulic fluid can be selectively fed to access.One solenoid valve can
Serve multiple valve actuating systems that engine is equipped with.Patent CN201080019296.1 is Jacobs Vehicle Systems Inc.
Application for engine braking and the lost motion variable valve actuation system opened in advance of exhaust, the system control valve can be
Work, can be set in the hydraulic circuit in channel under the control of high speed electromagnetic trigger valve so that control valve can control it is hydraulic
Fluid is supplied to actuator piston and supplies hydraulic fluid from actuator piston；Patent CN200910140026.5 is the graceful quotient of Germany
The engine braking apparatus with valve additional control unit applied with vehicle joint-stock company and for the side of engine braking
Method, the exhaust valve of the brake apparatus by means of one include a hydraulic valve Auxiliary Control Element mechanical bindiny mechanism with
Camshaft is connected.Exhaust valve is maintained on the position temporarily opened by hydraulic valve Auxiliary Control Element.Hydraulic valve is auxiliary
Help control unit can by means of one relative to internal combustion engine main oil return line add setting auxiliary oil return line be switched on and off.
The control method of engine braking described above is opened loop control, when engine braking needs to intervene, brakes electromagnetism
Valve is to electricity, and when engine braking releases, braking electromagnetic valve removes electricity, and the above engine braking control method causes engine braking to be situated between
The time for entering and exiting is generally longer, has an impact in this way to the conversion process of engine braking and fired state, causes to start
Machine transient state conversion process is unstable.
Utility model content
In order to overcome the shortcomings of background technique, the utility model provides a kind of electromagnetic control type engine braking apparatus, solution
When certainly available engine braking opens or closes, the time is long, the problem unstable to engine transient conversion process.
Technical solution adopted by the utility model: a kind of electromagnetic control type engine braking apparatus, including camshaft；
Auxiliary cam is arranged on camshaft, and includes basic circle, a CR peach and a BGR peach；
Auxiliary rocker arm, rotary setting along the longitudinal direction, front end is corresponding with exhaust valve, effect of its rear end in elastic component
It is lower to be in contact with auxiliary cam；
The front end of auxiliary rocker arm is arranged in control mechanism, has first for keeping gap with exhaust valve end always
Set, and can be near near and compression bottom dead center when contacted with exhaust valve end open exhaust valve realize compression
The second position of formula engine braking；
Electromagnetic controller is correspondingly arranged with control mechanism, for drive control mechanism first position and the second position it
Between converted；
BCU brak control unit connects electromagnetic controller, for receiving signal, and outputs control signals to Electromagnetic Control
Device, control electromagnetic controller movement；
ECU electronic control unit connects BCU brak control unit, for the operating position of real-time monitoring camshaft, and will
The position signal passes to BCU brak control unit；
The auxiliary cam, auxiliary rocker arm, control mechanism, the quantity of electromagnetic controller are identical as engine cylinder number, and with
Each engine cylinder is corresponding.
The auxiliary rocker arm rear end is equipped with idler wheel, and the idler wheel is in contact with auxiliary cam.
The beneficial effects of the utility model are: 1, individually powered strategy using single cylinder according to current camshaft location, one
Electromagnetic controller drives a control mechanism job, realizes that camshaft revolves the switching of turn around interior completion positive work and negative work, significantly
It promotes engine braking and enters into and exits from speed；2, control is monitored by BCU brak control unit and ECU electronic control unit automatically
System, and then control electromagnetic controller drive control mechanism and execute movement in ideal position, guarantee that system is stable and reliable in work.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment electromagnetic control type engine braking apparatus.
Fig. 2 is electromagnetic control type engine braking apparatus when the utility model embodiment control mechanism is in first position
Cross-sectional view.
Fig. 3 is electromagnetic control type engine braking apparatus when the utility model embodiment control mechanism is in the second position
Cross-sectional view.
Fig. 4 is the cross-sectional view of the utility model embodiment auxiliary cam.
Fig. 5 is the method schematic block diagram that the utility model embodiment opens electromagnetic control type engine braking apparatus.
Fig. 6 is the method schematic block diagram that the utility model embodiment closes electromagnetic control type engine braking apparatus.
Fig. 7 is the braking valve lifting curve figure of the utility model embodiment electromagnetic control type engine braking apparatus.
Fig. 8 be in the utility model embodiment engine operation process gap between control mechanism and exhaust valve end with
The curve graph of shaft crank angle variation.
Specific embodiment
The utility model embodiment is described further with reference to the accompanying drawing:
As shown in Figs 1-4, a kind of electromagnetic control type engine braking apparatus, including camshaft 1, auxiliary cam 2, auxiliary are shaken
Arm 3, control mechanism 4, electromagnetic controller 5, BCU brak control unit, ECU electronic control unit 7.
The auxiliary cam 2 is arranged on camshaft 1, and includes 21, CR peaches 22 of basic circle and a BGR peach
Son 23.
The auxiliary rocker arm 3 passes through rocker arm shaft rotatable setting along the longitudinal direction, 3 front end of auxiliary rocker arm and exhaust valve
Corresponding, its rear end is in contact with auxiliary cam 2 under the action of the elastic member.
In order to reduce abrasion, improves service life, one idler wheel 8 is usually set in 3 rear end of auxiliary rocker arm, by described
Idler wheel 8 is in contact with auxiliary cam 2, is capable of forming rolling cooperation between the two, so friction can be reduced, is further reduced mill
Damage.
The front end of auxiliary rocker arm 3 is arranged in the control mechanism 4, and has first position and two kinds of second position working position
It sets.
When control mechanism 4 is in first position, control mechanism 4 maintains gap with exhaust valve end always, will not beat
Begin to rehearse valve, so that engine is in the state of a normal work.
When control mechanism 4 is in the second position, with the rotation of camshaft, control mechanism 4 can connect with exhaust valve end
Exhaust valve is touched and opened, realizes Compression Engine braking.
In the foregoing description, so-called CR refers to and opens braking valve in piston top dead center attachment, i.e., when control mechanism 4
When in the second position, end in contact after the CR peach 22 and auxiliary rocker arm 3 on auxiliary cam 2 pushes auxiliary rocker arm 3 to rotate, makes
Control mechanism 4 is obtained to contact with exhaust valve end and open exhaust valve.
So-called BGR refers to that piston is again turned on exhaust valve near bottom dead center, introduces exhaust gas, thus increase braking ability,
I.e. when control mechanism 4 is in the second position, end in contact after the BGR peach 23 and auxiliary rocker arm 3 on auxiliary cam 2 is pushed auxiliary
Rocker arm 3 is helped to rotate, so that control mechanism 4 is contacted with exhaust valve end is again turned on exhaust valve.
The control mechanism 4 can use the form of mandril as Figure 2-3, and the mandril is movable up and down to be arranged auxiliary
3 front end of rocker arm is helped, is then first position when mandril is in upper end position, is then second when mandril is in lower end position
It sets.
The electromagnetic controller 5 is correspondingly arranged at the top of control mechanism 4, for drive control mechanism 4 first position with
It is converted between the second position.
Wherein, the auxiliary cam 2, auxiliary rocker arm 3, control mechanism 4, electromagnetic controller 5 are equipped with multiple, quantity with
Engine cylinder number is identical, and corresponding with each engine cylinder respectively.
The ECU electronic control unit 7 is used for the operating position of real-time monitoring camshaft 1, and can be by the position signal
Pass to BCU brak control unit 6.
The BCU brak control unit 6 connects electromagnetic controller 5, for receiving signal, and outputs control signals to electromagnetism
Controller 5, the information that the BCU brak control unit 6 can transmit ECU electronic control unit 7 are handled, and calculate phase
5 operation interval of electromagnetic controller answered, and then control 5 drive control mechanism 4 of electromagnetic controller and execute movement in ideal position.
As shown in figure 5, specifically comprising the following steps: when opening electromagnetic control type engine braking apparatus
Step 1: making the action signal that engine work is transformed into engine braking；
Step 2: ECU electronic control unit 7 detects the operating position of camshaft 1, and the position is passed into BCU braking
Control unit 6；
Step 3: the information that BCU brak control unit 6 transmits ECU electronic control unit 7 is handled, phase is calculated
The operation interval for answering electromagnetic controller 5, when auxiliary cam 2 rotates to the position that basic circle 21 is contacted with auxiliary rocker arm 3, control electricity
5 drive control mechanism 4 of magnetic controller executes movement, and engine braking is realized in the conversion of control mechanism 4 to the second position；
Step 4: each electromagnetic controller 5 is sequentially completed movement when camshaft 1 rotates a circle.
As shown in fig. 6, specifically comprising the following steps: when closing electromagnetic control type engine braking apparatus
Step 1: making the action signal that engine braking is transformed into engine work；
Step 2: ECU electronic control unit 7 detects the operating position of camshaft 1, and the position is passed into BCU braking
Control unit 6；
Step 3: the information that BCU brak control unit 6 transmits ECU electronic control unit 7 is handled, phase is calculated
The operation interval for answering electromagnetic controller 5, when auxiliary cam 2 rotates to the position that basic circle 21 is contacted with auxiliary rocker arm 3, control electricity
5 drive control mechanism 4 of magnetic controller executes movement, and engine work is realized in the conversion of control mechanism 4 to first position；
Step 4: each electromagnetic controller 5 is sequentially completed movement when camshaft 1 rotates a circle.
In the utility model embodiment, a control mechanism job is driven by electromagnetic controller, according to working as lordosis
Wheel shaft position is individually powered strategy using single cylinder, realizes that camshaft rotation is turned around the switching of interior completion positive work and negative work, thus greatly
The big speed for promoting engine braking and entering into and exiting from.
As shown in fig. 7, the braking valve lifting curve of electromagnetic control type engine braking apparatus includes exhaust valve lift master
Lift 81, CR sections of braking lifts 82, BGR sections of braking lifts 83.
As shown in figure 8, in engine operation process control mechanism 4 and exhaust valve end gap can with crank angle and
Variation.
When crank angle is in CR sections of braking lifts 82 and BGR sections of braking lifts 83, gap width is the smallest, if
This stage carries out braking switching, in fact it could happen that failed handoff scenario, to guarantee system reliability, it should be necessary to ensure that and be in gap
Switching is completed when maximum, i.e., when crank angle rotates in exhaust valve lift main 81 stage of lift, that is, auxiliary cam 2
The position that basic circle 21 is contacted with auxiliary rocker arm 3.
Due to monitoring control automatically by BCU brak control unit and ECU electronic control unit, and then electricity can be accurately controlled
Magnetic controller can drive control mechanism in optimal position execute movement, to guarantee that system is stable and reliable in work
Embodiment is not construed as the limitation to utility model, but any spiritual improvements introduced based on the utility model,
It should all be within the protection scope of the utility model.
Claims (3)
1. a kind of electromagnetic control type engine braking apparatus, it is characterised in that: including
Camshaft (1)；
Auxiliary cam (2) is arranged on camshaft (1), and includes basic circle (21), a CR peach (22) and a BGR
Peach (23)；
Auxiliary rocker arm (3), rotary setting along the longitudinal direction, front end is corresponding with exhaust valve, effect of its rear end in elastic component
It is lower to be in contact with auxiliary cam (2)；
Control mechanism (4), setting have in the front end of auxiliary rocker arm (3) and keep the first of gap with exhaust valve end always
Position, and can be near near and compression bottom dead center when contacted with exhaust valve end open exhaust valve realize pressure
The second position of contracting formula engine braking；
Electromagnetic controller (5) is correspondingly arranged with control mechanism (4), for drive control mechanism (4) in first position and second
It is converted between setting；
BCU brak control unit (6) connects electromagnetic controller (5), for receiving signal, and outputs control signals to electromagnetism control
Device (5) processed, control electromagnetic controller (5) movement；
ECU electronic control unit (7) connects BCU brak control unit (6), is used for the working position of real-time monitoring camshaft (1)
It sets, and the position signal is passed into BCU brak control unit (6).
2. electromagnetic control type engine braking apparatus according to claim 1, it is characterised in that: the auxiliary cam (2),
Auxiliary rocker arm (3), control mechanism (4), the quantity of electromagnetic controller (5) are identical as engine cylinder number, and with each engine cylinder phase
It is corresponding.
3. electromagnetic control type engine braking apparatus according to claim 1, it is characterised in that: the auxiliary rocker arm (3)
Rear end is equipped with idler wheel (8), and the idler wheel (8) is in contact with auxiliary cam (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821470043.6U CN208831060U (en) | 2018-09-10 | 2018-09-10 | A kind of electromagnetic control type engine braking apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821470043.6U CN208831060U (en) | 2018-09-10 | 2018-09-10 | A kind of electromagnetic control type engine braking apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN208831060U true CN208831060U (en) | 2019-05-07 |
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ID=66312536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821470043.6U Active CN208831060U (en) | 2018-09-10 | 2018-09-10 | A kind of electromagnetic control type engine braking apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825326A (en) * | 2018-09-10 | 2018-11-16 | 浙江黎明发动机零部件有限公司 | A kind of electromagnetic control type engine braking apparatus and its opening and closing control method |
| CN115506898A (en) * | 2022-09-28 | 2022-12-23 | 广西玉柴机器股份有限公司 | Control device and control method for dynamic graded exhaust brake |
-
2018
- 2018-09-10 CN CN201821470043.6U patent/CN208831060U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825326A (en) * | 2018-09-10 | 2018-11-16 | 浙江黎明发动机零部件有限公司 | A kind of electromagnetic control type engine braking apparatus and its opening and closing control method |
| CN115506898A (en) * | 2022-09-28 | 2022-12-23 | 广西玉柴机器股份有限公司 | Control device and control method for dynamic graded exhaust brake |
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| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: 316000 Honglu Avenue, Xingang Park, Zhoushan High-tech Industrial Park, Zhejiang Province Patentee after: Zhejiang Liming Zhizhuang Co., Ltd. Address before: 316000 No. 456 Hongsheng Avenue, Zhoushan City, Zhejiang Province Patentee before: Zhejiang Liming Motor Parts Co., Ltd. |