CN105545497B - The vehicle brake cruise control method of application engine braking system - Google Patents
The vehicle brake cruise control method of application engine braking system Download PDFInfo
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- CN105545497B CN105545497B CN201510996320.1A CN201510996320A CN105545497B CN 105545497 B CN105545497 B CN 105545497B CN 201510996320 A CN201510996320 A CN 201510996320A CN 105545497 B CN105545497 B CN 105545497B
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- braking
- electromagnetic valve
- braking electromagnetic
- ecu
- engine
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/06—Cutting-out cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
- F02D2200/501—Vehicle speed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Regulating Braking Force (AREA)
Abstract
The present invention relates to vehicle braking technology fields, disclose a kind of engine braking system, including ECU, main oil gallery, three braking electromagnetic valves and with one-to-one six brake rocker arms of six cylinders of engine, the ECU individually connect by braking electromagnetic valve harness with three braking electromagnetic valves respectively；The oil circuit of one braking electromagnetic valve is connected to two brake rocker arms respectively, and the oil circuit of three braking electromagnetic valves is respectively connected to the main oil gallery.The present invention also provides a kind of methods carrying out vehicle brake cruise control using above-mentioned engine braking system.The present invention can improve vehicle travel safety when vehicle lower long slope, reduce driver's labor intensity.
Description
Technical field
The present invention relates to vehicle braking technology fields, are braked more particularly to a kind of vehicle of application engine braking system
Cruise control method.
Background technology
Current most of vehicles are in fully loaded or heavily loaded lower long slope, it is necessary to engine braking is opened on some gear, and
Carry out regulation speed in conjunction with the service brake of interval, when using engine braking, driver need to be according to feelings such as road conditions and vehicle loads
Condition selects suitable gear, and gives service brake appropriate according to speed size.
As shown in Figure 1, control flow when existing vehicle lower long slope is：Vehicle starts lower long slope --- and driver is linked into a certain
Gear, and reach suitable setting speed --- driver presses an engine stop button --- ECU (Electronic
Control Unit, electronic control unit) engine braking modes are opened in control, and open whole braking electromagnetic valves --- driver
Gear is adjusted according to speed situation of change or takes that service brake --- vehicle speed maintains near setting speed；However whole
When vehicle lower long slope, need driver that selection gear is gone to carry out engine braking, if the gear of selection is too low, engine when identical speed
Brake force is very big, therefore speed is often relatively low；If the gear of selection is excessively high, engine brake force is insufficient when identical speed, needs
Driver frequently uses running brake to reduce speed, is easy overheat when running brake frequently uses and braking efficiency is made substantially to drop
It is low, insecurity when descent driving is increased, and frequently service brake also increases driver's working strength.
Invention content
(1) technical problems to be solved
The technical problem to be solved by the present invention is to how improve vehicle travel safety when vehicle lower long slope, driver is reduced
Labor intensity.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of engine braking systems, including set there are six cylinder
Engine and speed changer for regulation stall further include ECU, main oil gallery, the first braking electromagnetic valve, the second braking electromagnetism
Valve, third braking electromagnetic valve and with the one-to-one cylinder brake rocker arm of six cylinders of the engine, two cylinder braking shake
Arm, three cylinder brake rocker arms, four cylinder brake rocker arms, five cylinder brake rocker arms and six cylinder brake rocker arms, the ECU is respectively by braking electricity
Magnet valve harness is individually connect with first braking electromagnetic valve, the second braking electromagnetic valve and third braking electromagnetic valve；Described first
The oil circuit of braking electromagnetic valve is connected to the cylinder brake rocker arm and six cylinder brake rocker arms respectively, second braking electromagnetic valve
Oil circuit is connected to the two cylinder brake rocker arm and five cylinder brake rocker arms respectively, the oil circuit of the third braking electromagnetic valve respectively with institute
State three cylinder brake rocker arms and the connection of four cylinder brake rocker arms, first braking electromagnetic valve, the second braking electromagnetic valve and third braking
The oil circuit of solenoid valve is respectively connected to the main oil gallery.
Wherein, the input wires terminal of first braking electromagnetic valve and output wiring terminal pass through braking electricity respectively
Magnet valve harness is connect with the ECU, and the input wires terminal and output wiring terminal of second braking electromagnetic valve pass through respectively
The braking electromagnetic valve harness is connect with the ECU, the input wires terminal and outlet terminal of the third braking electromagnetic valve
Son is connect by the braking electromagnetic valve harness with the ECU respectively.
The present invention also provides a kind of methods carrying out vehicle brake cruise control using above-mentioned engine braking system, when whole
When vehicle starts lower long slope, following steps are carried out：
S1, driver are linked into a certain gear in advance, and regulation speed reaches the setting speed of needs；
S2, vehicle brake cruise button is pressed by driver, vehicle enters brake cruise pattern；
Engine braking modes are opened in S3, ECU control, and open two of which braking electromagnetic valve；
S4, ECU monitor current vehicle speed in real time；
S5, judge whether current vehicle speed is more than setting speed, if so, S6 is executed, if it is not, then executing S9；
Three braking electromagnetic valves are opened in S6, ECU control；
S7, ECU continue to monitor current vehicle speed in real time；
S8 simultaneously judges whether current vehicle speed is less than setting speed and if it is not, then executing S12, and is returned if so, returning to S3
Gear is adjusted in S1, continues to run with procedure above；
A braking electromagnetic valve is only opened in S9, ECU control；
S10, ECU continue to monitor current vehicle speed in real time；
S11 simultaneously judges whether current vehicle speed is more than setting speed and if it is not, then executing S12, and is returned if so, returning to S3
It returns in S1 and adjusts gear, continue to run with procedure above；
S12, vehicle brake cruise button is closed.
(3) advantageous effect
Compared with prior art, the present invention has the following advantages：
A kind of engine braking system provided by the invention, by using above-mentioned technical proposal, engine braking cylinder number
It is adjustable, and relationship when combination engine brake force, transmission gear and vehicle descending between external force, it provides under a set of vehicle
Brake cruise control method when long slope is made vehicle run in the setting speed of suitable gear by way of closed-loop control, subtracted
The frequency that driver operates vehicle in lower long slope is lacked, so that driver there are more time concern road conditions, to reduction department
Machine labor intensity, vehicle travel safety when improving lower long slope.
Description of the drawings
Control flow chart when Fig. 1 is prior art vehicle lower long slope；
Fig. 2 is a kind of connection relationship diagram of engine braking system of the present invention；
Fig. 3 is vehicle brake cruise control flow chart of the present invention；
Fig. 4 is the engine brake force of an embodiment of the present invention, the outer force curve schematic diagram of descending.
In figure：1：ECU；2：Braking electromagnetic valve harness；3：Main oil gallery；4：First braking electromagnetic valve；5：Second braking electromagnetism
Valve；6：Third braking electromagnetic valve；7：Six cylinder brake rocker arms；8：Five cylinder brake rocker arms；9：Four cylinder brake rocker arms；10：Three cylinders are braked
Rocking arm；11：Two cylinder brake rocker arm；12：One cylinder brake rocker arm；Va：Set speed；V：Current vehicle speed.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Following instance
For illustrating the present invention, but it is not limited to the scope of the present invention.
In the description of the present invention, it should be noted that term " first ", " second ", " third " etc. are only used for description mesh
, it is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As shown in Fig. 2, be a kind of engine braking system provided by the invention, including set there are six cylinder engine and
Further include that 3, three ECU1 (electronic control unit), main oil gallery braking electromagnetic valves are respectively for the speed changer of regulation stall
First braking electromagnetic valve 4, the second braking electromagnetic valve 5, third braking electromagnetic valve 6 and six brake rocker arms, six brakings
Rocking arm is respectively the one-to-one cylinder brake rocker arm 12 of six cylinders, two cylinder brake rocker arm 11, three cylinders with the engine
Brake rocker arm 10, four cylinder brake rocker arms 9, five cylinder brake rocker arms 8 and six cylinder brake rocker arms 7, the ECU1 are used for car engine
The feedback signal of machine and vehicle sensor carries out operation, processing, judgement, and can send out instruction, control respective actuators work, institute
ECU1 is stated to brake by braking electromagnetic valve harness 2 and first braking electromagnetic valve 4, the second braking electromagnetic valve 5 and third respectively
Solenoid valve 6 individually connects, which can single movement；Engine work is steady when to ensure engine braking
It is qualitative, often use oil spout order one-five-three-six-two-tetra-, the oil circuit point of first braking electromagnetic valve 4 in conjunction with six cylinder engine
Be not connected to the cylinder brake rocker arm 12 and six cylinder brake rocker arms 7, the oil circuit of second braking electromagnetic valve 5 respectively with it is described
Two cylinder brake rocker arm 11 is connected to five cylinder brake rocker arms 8, and the oil circuit of the third braking electromagnetic valve 6 is braked with three cylinder respectively
Rocking arm 10 is connected to four cylinder brake rocker arms 9, and the oil circuit of each braking electromagnetic valve is communicated with the brake rocker arm of two cylinders, brake rocker arm
Can be open-top by exhaust valve under oil pressure effect and so that engine is entered braking mode, first braking electromagnetic valve 4, second is braked
The oil circuit of solenoid valve 5 and third braking electromagnetic valve 6 is respectively connected to the main oil gallery 3, when ECU1 sends out engine braking command,
Corresponding braking electromagnetic valve is powered, and braking electromagnetic valve work makes the oil communication between main oil gallery 3 and the brake rocker arm of respective cylinder, main
Engine oil pressure in oil duct 3 can make the brake rocker arm of respective cylinder work, and start mechanism to make the respective cylinder of engine generate
Kinetic moment.Different cylinders is controlled respectively with multiple braking electromagnetic valves participates in engine braking, engine work when to ensure to brake
Make stationarity, the cylinder of braking electromagnetic valve control is rationally set according to engine oil spout order.
Specifically, the input wires terminal of first braking electromagnetic valve 4 and output wiring terminal pass through the system respectively
Moving electromagnetic valve harness 2 is connect with the ECU1, the input wires terminal and output wiring terminal point of second braking electromagnetic valve 5
It is not connect with the ECU1 by the braking electromagnetic valve harness 2, the input wires terminal of the third braking electromagnetic valve 6 and defeated
Go out connecting terminal to connect with the ECU1 by the braking electromagnetic valve harness 2 respectively；Form closed-loop control.
As shown in figure 3, the present invention also provides a kind of above-mentioned engine braking systems of application to carry out vehicle brake cruise control
The method of system, by vehicle, air drag is influenced when driving, and external force when vehicle descending improves with speed and reduced, and starts mechanism
Power increases with the raising of engine speed, it is contemplated that the transmission ratio of power train is different when different stalls, therefore different stalls
Brake force under identical speed also differs, i.e., to reach same speed when low-grade, and required engine speed is higher, hair
Motivation brake force is also bigger, and the cylinder number for participating in engine braking is more, and brake force is bigger.When vehicle lower long slope, if department
Machine is needed in a certain speed constant speed brake cruise, it is only necessary to determine the descending external force under the speed is less than the engine of which gear
Brake force, thus can by design a control flow come make ECU1 control adjustment participate in engine braking number of cylinders come
Make vehicle stable operation in a certain speed；When vehicle starts lower long slope, following steps can be carried out：
S1, driver are linked into a certain gear in advance according to vehicle loading and gradient situation, and regulation speed reaches the setting of needs
Vehicle velocity Va；
S2, vehicle brake cruise button is pressed by driver, vehicle enters brake cruise pattern；
S3, ECU1 control fuel injector and stop oil spout, open engine braking modes, and open two of which braking electromagnetism
Valve, there are four cylinders to carry out engine braking at this time；
S4, ECU1 monitor current vehicle speed V in real time；
S5, judge whether current vehicle speed V is more than setting vehicle velocity Va, if so, the engine brake force of four cylinders of explanation is not
Foot, then execute S6, if it is not, the engine brake force of four cylinders of explanation is excessive, then executes S9；
S6, ECU1 control open three braking electromagnetic valves, so that six cylinders is all carried out engine braking, current vehicle speed,
Engine brake force reaches maximum under gear；
S7, ECU1 continue to monitor current vehicle speed in real time；
S8 simultaneously judges whether current vehicle speed V is less than setting vehicle velocity Va, if so, three braking electromagnetic valves of explanation all work
When engine brake force it is excessive, then return to S3, only the work of two braking electromagnetic valves of control, so makes vehicle stablize in setting speed
Operation nearby, if it is not, suffered when engine brake force is still less than vehicle descending when three braking electromagnetic valves of explanation all work
The external force arrived, current gear is higher at this time, then executes S12, and returns and adjust gear specially one gear of reduction in S1, continues
Run procedure above；
S9, ECU1 control only open a braking electromagnetic valve, make only there are two cylinder carry out engine braking；
S10, ECU1 continue to monitor current vehicle speed V in real time；
S11 simultaneously judges whether current vehicle speed V is more than setting vehicle velocity Va, if so, the engine brake force of two cylinders of explanation
Deficiency then returns to S3, and ECU1 controls is made to open two braking electromagnetic valves, if it is not, the engine brake force of two cylinders of explanation is still
So excessive, current gear is relatively low at this time, then executes S12, and returns and adjust gear specially one gear of raising in S1, after reforwarding
Row procedure above；So until making vehicle under a certain suitable gear, in setting vehicle velocity VaUpper progress brake cruise operation；
S12, vehicle brake cruise button is closed.
Relationship when opening number according to different stalls, different speeds, different braking solenoid valve between engine brake force,
Closed-loop control is carried out to gear, braking electromagnetic valve to the judgement of speed by ECU1, makes vehicle stable operation in suitable gear
It sets in speed, reaching reduces driver's labor intensity, the purpose of vehicle travel safety when improving lower long slope.
As shown in figure 4, engine brake force and vehicle descending external force curve graph that the present invention provides, it can be seen that start
The number double influence that brake force is worked by gear and braking electromagnetic valve, and engine brake force is in anti-with vehicle descending external force
Than.
As can be seen from the above embodiments, the adjustable engine braking system of engine braking cylinder number that the present invention designs,
And relationship when combining engine brake force, transmission gear and vehicle descending between external force, provide a set of vehicle lower long slope
When brake cruise control method, so that vehicle is run in the setting speed of suitable gear by way of closed-loop control, reduce
Driver, to the frequency of vehicle operation, makes driver have more time concern road conditions, to reduce driver's labor in lower long slope
Fatigue resistance, vehicle travel safety when improving lower long slope；The frequency that service brake uses can also be reduced, brake-shoe is reduced
The degree of wear, extend the service life of running brake, while also avoiding temperature mistake when service brake hoof works long hours
The problem of height causes stopping power drastically to decline, the safety of emergency braking when to improve vehicle lower long slope.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (2)
1. a kind of method that application engine braking system carries out vehicle brake cruise control, which is characterized in that engine braking
System includes the speed changer and ECU, main oil gallery, the first braking electricity set there are six the engine of cylinder and for regulation stall
Magnet valve, the second braking electromagnetic valve, third braking electromagnetic valve and the one-to-one cylinder system of six cylinders with the engine
Shake arm, two cylinder brake rocker arm, three cylinder brake rocker arms, four cylinder brake rocker arms, five cylinder brake rocker arms and six cylinder brake rocker arms, it is described
ECU passes through braking electromagnetic valve harness and first braking electromagnetic valve, the second braking electromagnetic valve and third braking electromagnetic valve respectively
Individually connection；The oil circuit of first braking electromagnetic valve is connected to the cylinder brake rocker arm and six cylinder brake rocker arms respectively, institute
The oil circuit for stating the second braking electromagnetic valve is connected to the two cylinder brake rocker arm and five cylinder brake rocker arms respectively, the third braking electricity
The oil circuit of magnet valve is connected to the three cylinders brake rocker arm and four cylinder brake rocker arms respectively, first braking electromagnetic valve, the second system
The oil circuit of moving electromagnetic valve and third braking electromagnetic valve is respectively connected to the main oil gallery；When vehicle starts lower long slope, carry out as follows
Step：
S1, driver are linked into a certain gear in advance, and regulation speed reaches the setting speed of needs；
S2, vehicle brake cruise button is pressed by driver, vehicle enters brake cruise pattern；
Engine braking modes are opened in S3, ECU control, and open two of which braking electromagnetic valve；
S4, ECU monitor current vehicle speed in real time；
S5, judge whether current vehicle speed is more than setting speed, if so, S6 is executed, if it is not, then executing S9；
Three braking electromagnetic valves are opened in S6, ECU control；
S7, ECU continue to monitor current vehicle speed in real time；
S8 simultaneously judges whether current vehicle speed is less than setting speed and if it is not, then executing S12, and is returned in S1 if so, returning to S3
Gear is adjusted, procedure above is continued to run with；
A braking electromagnetic valve is only opened in S9, ECU control；
S10, ECU continue to monitor current vehicle speed in real time；
S11 simultaneously judges whether current vehicle speed is more than setting speed and if it is not, then executing S12, and returns to S1 if so, returning to S3
Middle adjustment gear, continues to run with procedure above；
S12, vehicle brake cruise button is closed.
2. the method that application engine braking system according to claim 1 carries out vehicle brake cruise control, feature
It is, the input wires terminal and output wiring terminal of first braking electromagnetic valve pass through the braking electromagnetic valve harness respectively
It is connect with the ECU, the input wires terminal and output wiring terminal of second braking electromagnetic valve pass through the braking respectively
Solenoid valve harness are connect with the ECU, and the input wires terminal and output wiring terminal of the third braking electromagnetic valve lead to respectively
The braking electromagnetic valve harness is crossed to connect with the ECU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510996320.1A CN105545497B (en) | 2015-12-25 | 2015-12-25 | The vehicle brake cruise control method of application engine braking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510996320.1A CN105545497B (en) | 2015-12-25 | 2015-12-25 | The vehicle brake cruise control method of application engine braking system |
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| Publication Number | Publication Date |
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| CN105545497A CN105545497A (en) | 2016-05-04 |
| CN105545497B true CN105545497B (en) | 2018-08-07 |
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| CN201510996320.1A Active CN105545497B (en) | 2015-12-25 | 2015-12-25 | The vehicle brake cruise control method of application engine braking system |
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| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203547822U (en) * | 2013-09-23 | 2014-04-16 | 浙江九隆机械有限公司 | Internal brake of engine cylinder |
| CN104481628A (en) * | 2014-12-25 | 2015-04-01 | 浙江康和机械科技有限公司 | Mechanical connection type engine integration rocker arm brake device with valve lift reset function |
| CN204511555U (en) * | 2014-12-24 | 2015-07-29 | 潍柴动力股份有限公司 | A kind of engine braking oil path |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4254027B2 (en) * | 2000-07-26 | 2009-04-15 | 株式会社デンソー | Integrated vehicle control system |
| JP3937723B2 (en) * | 2000-12-13 | 2007-06-27 | トヨタ自動車株式会社 | Vehicle control device |
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- 2015-12-25 CN CN201510996320.1A patent/CN105545497B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203547822U (en) * | 2013-09-23 | 2014-04-16 | 浙江九隆机械有限公司 | Internal brake of engine cylinder |
| CN204511555U (en) * | 2014-12-24 | 2015-07-29 | 潍柴动力股份有限公司 | A kind of engine braking oil path |
| CN104481628A (en) * | 2014-12-25 | 2015-04-01 | 浙江康和机械科技有限公司 | Mechanical connection type engine integration rocker arm brake device with valve lift reset function |
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