CN104590011B - Vehicle creep control system and control method - Google Patents
Vehicle creep control system and control method Download PDFInfo
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- CN104590011B CN104590011B CN201410844024.5A CN201410844024A CN104590011B CN 104590011 B CN104590011 B CN 104590011B CN 201410844024 A CN201410844024 A CN 201410844024A CN 104590011 B CN104590011 B CN 104590011B
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Abstract
The invention discloses a kind of vehicle creep control system and control method, which is as follows：Clutch is set between wheel terminal pad and the power output end of power drive mechanism in advance, and clutch is for combining or disconnecting wheel terminal pad and power drive mechanism；Detect the travel speed signal and throttle position signal of vehicle；Vehicle Speed is calculated according to travel speed signal, when the travel speed of vehicle is located at preset vehicle speed range, for throttle in when being totally released state, control clutch disconnects the connection of power drive mechanism and wheel terminal pad, and vehicle is made to be in sliding state；The control method controls vehicle sliding operation, can eliminate abrasion of the vehicle shift to gearbox gears, substantially increase the service life of gearbox gears, and can greatly simplify operation sequence, be applicable to the driver with different operation experience.
Description
Technical field
The present invention relates to technical field of automobile control, more particularly to a kind of vehicle creep control system and control method.
Background technology
Currently, neutral position sliding is to think more fuel-efficient operation in automotive field all the time.For EFI engine hand
For dynamic gear car, neutral position sliding be vehicle on road when driving, the shift lever of vehicle is placed in neutral gear (or N by driver
Shelves), the connection between such driving wheel of vehicle and engine will be switched off, and vehicle slides forward by self inertia, starts simultaneously
Machine, which is also at, rotates slow idling mode.It hangs up high-grade slowly refuel again after car speed reduction and improves speed, so
Repeatedly.Because engine operate in the idling state it is generally more fuel-efficient than under high speed state, therefore so as to save fuel.
It is in the vehicle of sliding state in the prior art when meeting emergency braking, because engine and driving wheel disconnect,
It can only rely on and step on foot brake, be braked using brake rim locking tire, which is easy to cause two wheel brakes of left and right
Disequilibrium, kinetic stability is poor when leading to vehicle brake, is susceptible to traffic accident.
It is bigger for the gear damage in engine and gearbox in view of being slided in non-neutral gear position, and keep away
Exempt to be in because of vehicle on the gear of non-neutral gear, end, which is slided, tramples throttle and can occur play situation suddenly, generally, before vehicle sliding
Gear need to must be placed in neutral gear position.
Neutral gear and operation range convert the abrasion for often accelerating gearbox gears, and the taxi operation phase back and forth
Driving ability and the adaptability to changes requirement for coping with driver are relatively high, and misoperation may damage the gear in gearbox, influence
The service life of vehicle endangers the personal safety of driver and passenger, therefore the use limitation of neutral position sliding is bigger,
Be not suitable for the less driver's operation of experience, traffic law is forbidden to use neutral position sliding operation.
Therefore, how a kind of vehicle creep control system is provided, which can be greatly lowered the oil consumption of engine,
Operation is simple simultaneously is suitble to range wider, and processing safety is relatively high, is that those skilled in that art are urgently to be resolved hurrily
The technical issues of.
Invention content
The purpose of the present invention is to provide a kind of vehicle creep control system and control method, the control system can significantly drop
The oil consumption of low engine, while operation is simple is suitble to range wider, and processing safety is relatively high.
In order to solve the above technical problems, the present invention provides a kind of vehicle sliding control method, the control method specific steps
It is as follows：
Clutch, the clutch are set between wheel terminal pad and the power output end of power drive mechanism in advance
Mechanism is used in conjunction with or disconnects the wheel terminal pad and the power drive mechanism；
Detect the travel speed signal and throttle position signal of vehicle；
Vehicle Speed is calculated according to the travel speed signal, when the travel speed of vehicle is located at preset vehicle speed model
It encloses, for throttle in when being totally released state, control clutch disconnects the connection of power drive mechanism and wheel terminal pad, makes vehicle
Be in sliding state.
Preferably, while disconnecting the connection of the power drive mechanism and wheel terminal pad, by the throttle of engine
It is automatically placed in throttle at idle state.
Preferably, following steps are still further comprised：
Be in sliding state in vehicle, when judge the throttle be in trample state when, control clutch connect
Close the power drive mechanism and wheel terminal pad.
Preferably, following steps are still further comprised：
Detect brake actuator position signal；
It is in sliding state in vehicle, when judging that the brake actuator is in skidding state, control
Clutch engages the power drive mechanism and wheel terminal pad.
Preferably, the engine is multicylinder engine, and the quantity of cylinder is 2N, wherein N is more than or equal to 2
Natural number；The control method further comprises the steps：
When engine is in idling mode, the cylinder is divided into two groups, preceding 1 to N cylinders is first group, rear N+1
It it is second group to 2N cylinders, the first cylinder group and the second cylinder group alternately open work.
Preferably, the throttle opening for opening each cylinder in the cylinder group of work is：70%-90%.
The present invention also provides a kind of vehicle creep control systems, including with lower component：
Clutch is set between the wheel terminal pad of wheel and the output shaft of power drive mechanism, for combine or
Disconnect the wheel terminal pad and the power drive mechanism；
Vehicle speed sensor, the travel speed signal for detecting vehicle；
Throttle sensor, for detecting throttle position signal；
Controller, including slide control module；
It is described to slide control module, Vehicle Speed is calculated according to the travel speed signal, when the traveling speed of vehicle
Degree is located at preset vehicle speed range, and for throttle in when being totally released state, control clutch disconnects power drive mechanism and wheel
The connection of terminal pad.
Preferably, the control module that slides also further sets the throttle of engine while disconnecting clutch
In throttle at idle state.
Preferably, the controller further includes accelerating control module, for carrying out control as follows：
In the case where vehicle is in planing case, when judging that the brake actuator is in skidding state, clutch is controlled
Structure engages the power drive mechanism and wheel terminal pad.
Preferably, it still further comprises with lower component：
Brake actuator sensor, for detecting brake actuator position signal；
The controller further includes brake control module, to carry out control as follows：
In the case where vehicle is in planing case, when judging that the brake actuator is in skidding state, clutch is controlled
Mechanism engages the power drive mechanism and wheel terminal pad.
Preferably, the engine is multicylinder engine, and the quantity of cylinder is 2N, wherein N is more than or equal to 2
Natural number；The control module that slides also further carries out following control：
When engine is in idling mode, the cylinder is divided into two groups, preceding 1 to N cylinders is first group, rear N+1
It is the second cylinder group to 2N cylinders, the first cylinder group and the second cylinder group alternately open work.
Preferably, the throttle opening for opening each cylinder in the cylinder group of work is：70%-90%.
Preferably, the clutch is set on the goat's horn of drive axle.
Preferably, the clutch includes the taper driving wheel being fixedly installed on power output shaft, and the taper is driven
Driving wheel includes conical section and the circumferential outer spline section with fit engagement, and the peripheral surface of the conical section is nested with synchronous ring,
The synchronous ring has the inner peripheral surface that the outer surface with the conical section matches, and the small end of the conical section is close to the wheel
Terminal pad；
Further include the power output wheel that the power output shaft is installed on by bearing, the power output wheel and the vehicle
Wheel terminal pad is fixedly connected, and the outside of the power output wheel is nested with engaging sleeve, the engaging sleeve and the power output wheel,
The synchronous ring circumferentially limits, further include the driving engaging sleeve both can be opposite axial movement driving part, so as to
The outer spline section engagement or separation.
Preferably, the driving part includes the separation ring to slide axially on the goat's horn, and is detached with described
The electromagnetic component that ring is oppositely arranged and is fixed on the goat's horn, the nested power output shaft of the separation ring are simultaneously set to described
The inside of engaging sleeve, when electromagnetic component is in the first working condition, the separation ring pushed under the action of electromagnetic force described in nibble
Trap moves out, and the engaging sleeve is detached with the outer spline section, and wheel is in sliding mode；When electromagnetic component is in second
When working condition, it is described separation ring and the engaging sleeve between thrust disappear, the engaging sleeve return and with the external splines
Section engagement.
Preferably, further include the spring being installed between the engaging sleeve and the wheel terminal pad, the spring is along axis
To flexible, when the spring in a free state, the engaging sleeve is engaged with the outer spline section.
Preferably, the peripheral wall of the engaging sleeve offers at least one radial through-hole, the outer end tool of the radial through-hole
There are internal thread part, the radial through-hole to be equipped with sealing screw, compression spring and steel ball, the outer surface of the synchronous ring from the outside to the core
Corresponding position is provided with the recessed portion coordinated with the outer surface of the steel ball.
It is installed between wheel hub and the output shaft of power drive mechanism in vehicle creep control system provided by the present invention
There is clutch, when controller judges that the travel speed of vehicle is in preset vehicle speed range and throttle when being totally released state,
Controller will send control instruction in clutch, disconnect the company between wheel terminal pad and the output shaft of power drive mechanism
It connects, the connection between engine and wheel hub at this time is disconnected, and wheel is in freewheeling condition；Controller disconnects clutch
While, will also engine throttle be placed in throttle at idle state automatically.
Vehicle in the present invention slided before without consider vehicle whether be in neutral gear, only need to disconnect wheel terminal pad and
Vehicle sliding can be realized in the connection of the power output end of power drive mechanism, can compared with vehicle sliding in the prior art
Abrasion of the vehicle shift to gearbox gears is eliminated, substantially increases the service life of gearbox gears, and can be significantly
It simplifies procedures, is applicable to the driver with different operation experience.
Control method provided by the invention is implemented based on above-mentioned control system, therefore the control method has control
The above-mentioned technique effect of system.
Description of the drawings
Fig. 1 is the flow diagram of vehicle sliding control method in the first embodiment of the invention；
Fig. 2 is the flow diagram of vehicle sliding control method in second of embodiment of the invention；
Fig. 3 is the flow diagram of vehicle sliding control method in the third embodiment of the invention；
Fig. 4 is the structure diagram of vehicle creep control system in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of clutch in an embodiment of the present invention；
Fig. 6 is partial enlarged view at A in Fig. 5.
Wherein, the one-to-one relationship in Fig. 5 to Fig. 6 between component names and reference numeral is as follows：
Goat's horn 8, power output shaft 10, taper driving wheel 11, synchronizing wheel 12, power output wheel 13, engaging sleeve 14, electromagnetic part
Part 15, separation ring 16, spring 17, wheel terminal pad 18, installation axle 20, Automobile drive wheel bearing 21, steel ball 22, sealing screw
23, compression spring 24.
Specific implementation mode
Core of the invention is to provide a kind of vehicle creep control system and control method, the control system can significantly drop
The oil consumption of low engine, while operation is simple is suitble to range wider, and processing safety is relatively high.
Without loss of generality, technical solution is introduced by taking the vehicle with four stroke gasoline engines as an example herein, in order to make this
The technical staff in field more fully understands technical scheme of the present invention, with reference to control system, control method, attached drawing and specific
The present invention is described in further detail for embodiment.
Referring to FIG. 1, Fig. 1 is the flow diagram of vehicle sliding control method in the first embodiment of the invention.
The present invention provides a kind of vehicle creep control systems, including with lower component：Clutch is set to the vehicle of wheel
It takes turns between terminal pad and the output shaft of power drive mechanism, is used in conjunction with or disconnects the wheel terminal pad and the power transmission
Mechanism；The power of engine is generally transferred to the driving of connection wheel terminal pad by clutch, gearbox, power drive mechanism
Axis, wheel terminal pad are installed on by bearing on the goat's horn 8 of vehicle bridge, gearbox, power drive mechanism, Automobile drive wheel bearing
21, the link position relationship between wheel terminal pad and vehicle frame can refer to the prior art, and this will not be repeated here.
Vehicle creep control system in the present invention further includes vehicle speed sensor, and the vehicle speed sensor is for detecting vehicle
Travel speed signal；Vehicle speed sensor is generally mounted to beside the output shaft of gearbox, the vehicle that car vehicle speed sensor is detected
Speed be engine carry out idling, deceleration, shift one of Rule of judgment.
The vehicle creep control system further includes the throttle sensor and controller for detecting throttle position signal；Its
In, controller includes sliding control module；Control module is slided, Vehicle Speed is calculated according to the travel speed signal,
When the travel speed of vehicle is located at preset vehicle speed range, for throttle in when being totally released state, control clutch disconnects power
The connection of transmission mechanism and wheel terminal pad, driver can accordingly reduce the rotating speed of engine, such as by the oil of engine
Door is placed in throttle at idle state.
For four cylinder engine, preset vehicle speed range herein is typically generally：More than 35 kilometers/hour, it is less than
100 kilometers/hour, be verified by experiments when Vehicle Speed be less than 35 kilometers/hour, close cylinder slide to four cylinder engine damage
It is bigger, it is not suitable for closing cylinder and slides；When Vehicle Speed is more than 100 kilometers/hour, it is negative to be in 85% or more for engine at this time
Lotus cannot close cylinder, if it can also hold cylinder automatically when closing cylinder working.
Referring to FIG. 2, Fig. 2 is the flow chart of control method in a kind of specific embodiment provided by the present invention；The vehicle
For coasting control systems when carrying out taxi operation, specific control is as follows：
S1, between wheel terminal pad and the power output end of power drive mechanism clutch is set in advance, it is described
Clutch is used in conjunction with or disconnects the wheel terminal pad and the power drive mechanism；
S2, the travel speed signal and throttle position signal for detecting vehicle；
S3, Vehicle Speed is calculated according to the travel speed signal, when the travel speed of vehicle is located at preset vehicle speed
Range, throttle is in when being totally released state, and control clutch disconnects the connection of power drive mechanism and wheel terminal pad, together
When the throttle of engine is placed in throttle at idle state.
It is installed between wheel hub and the output shaft of power drive mechanism in vehicle creep control system provided by the present invention
There is clutch, when controller judges that the travel speed of vehicle is in preset vehicle speed range and throttle when being totally released state,
Controller will send control instruction in clutch, disconnect the company between wheel terminal pad and the output shaft of power drive mechanism
It connects, the connection between engine and wheel terminal pad at this time is disconnected, and wheel is in freewheeling condition；Controller disconnect from
While closing mechanism, it also will turn off one group of cylinder of engine and engine throttle be placed in throttle at idle state.
Vehicle in the present invention slided before without consider vehicle whether be in neutral gear, only need to disconnect wheel terminal pad and
Vehicle sliding can be realized in the connection of the power output end of power drive mechanism, can compared with vehicle sliding in the prior art
Abrasion of the vehicle shift to gearbox gears is eliminated, substantially increases the service life of gearbox gears, and can be significantly
It simplifies procedures, is applicable to the driver with different operation experience.
In addition, when vehicle is slided, engine throttle is automatically placed in throttle at idle state and simultaneously closes off one group of vapour
The work of cylinder can further save the energy, reduce vehicle energy loss, and be conducive to environmental protection.
Control method provided by the invention is implemented based on above-mentioned control system, therefore the control method has control
The above-mentioned technique effect of system, does not repeat again herein.
In order to ensure normal vehicle operation, the control system in above-described embodiment can further include acceleration control mould
Block, for carrying out control as follows：
When engine throttle is under throttle at idle state status, judge that the brake actuator is in skidding state
When, control clutch engages the power drive mechanism and wheel terminal pad.Correspondingly, referring to FIG. 2, Fig. 2 is the present invention
The flow diagram of vehicle sliding control method in second of embodiment；Control method increases based on the above method：
Step S4, in the case where vehicle is in planing case, when judge the throttle be in trample state when, control clutch
Engage the power drive mechanism and wheel terminal pad.
Certainly, the safety in vehicle travel process is the primary factor considered always, in order to ensure that vehicle sliding operates
Safety, coasting control systems can further include with lower component：Brake actuator sensor, for detecting brake system
Dynamic device position signal；
Referring to FIG. 3, Fig. 3 is the flow diagram of vehicle sliding control method in the third embodiment of the invention.It is described
Controller further includes brake control module, to carry out control as follows：
Step S5, it is in sliding state in vehicle, when judging that the brake actuator is in skidding state
When, control clutch engages the power drive mechanism and wheel terminal pad.
That is, when the vehicle in the various embodiments described above is in sliding state, when brake actuator sensor detects
Brake operation is carried out to vehicle to driver, then so that power drive mechanism and wheel terminal pad is engaged, can instantaneously automatically terminate
Vehicle sliding operates, in this way, when vehicle is braked using mechanical brake component, the engine of idling can play auxiliary braking vehicle
The effect for taking turns stop motion, is conducive to Quick brake, and is conducive to that stablizing for brake process vehicle is kept to brake.
In the various embodiments described above, engine is multicylinder engine, and the quantity of cylinder is 2N, wherein N be more than or equal to
2 natural number；The control method further comprises the steps：
When engine is in idling mode, the cylinder is divided into two groups, preceding 1 to N cylinders is first group, and rear N+1 is extremely
2N cylinders are second group, and first group of cylinder and second group of cylinder alternately open work.
By taking four cylinder engine as an example, when engine is in idling mode, the engine cylinder is divided into two groups, it is preceding
1,2 cylinders be first group, 3,4 cylinders be second group, 1,2 cylinder working when, 3,4 cylinders close, when then 3,4 cylinders work again, 1,2 cylinders close
It closes, alternately.
Similarly, the idling mode of six cylinder engine is as follows：Preceding 1,2,3 cylinders be first group, 4,5,6 cylinders be second group, 1,2,3
When cylinder working, 4,5,6 cylinders are closed, and then 4,5,6 cylinders work again, and 1,2,3 cylinders are closed, alternately.
The idling work principle of the multicylinder engine of other quantity is identical with more than, does not enumerate.
For further balanced engine service life and emission reduction effect, following research has also been carried out, it is specific as follows.
For the present invention still with vehicle motor for four stroke gasoline engines, the wherein specific fuel consumption of engine can use following formula table
Show：
Wherein, the meaning of each symbology is in above-mentioned formula：geFor specific fuel consumption (gram/horsepower-hour)；ηiTo indicate thermal effect
Rate；ηmFor mechanical efficiency；HuFor lower calorific value of fuel (kilocalorie/kilogram).
It is not difficult to find out specific fuel consumption g to be reduced from (1) formulaeIt only needs to improve thermal efficiency ηiAnd ηm.Mechanical efficiency should adopt
It takes and reduces friction loss, pumping loss and the consumption function of reducing subsidiary body.The main path for improving the thermal efficiency is to improve
Compression ratio and burning alkene gaseous mixture.The relationship of the thermal efficiency and petrol engine compression ratio can be represented by the formula.
Wherein, the meaning in above-mentioned formula representated by each symbol is：ε is the compression ratio of engine；K is adiabatic exponent.
In general burning alkene gaseous mixture needs higher compression ratio or takes other measures.And the raising of compression ratio
It is limited by octane number of fuel oil, while list is also unfavorable to atmosphere pollution from compression ratio is improved.
Power, torque and the specific fuel consumption that the part throttle characteristics of petrol engine is indicated all refer to the engine in declared working condition
Under numerical value, the minimum specific fuel consumption value in external characteristics that general so-called specific fuel consumption refers to.In actual use, due to landform
Difference, the fluctuating of road, pavement conditions difference is very big, and automobile to be made to be attained by the minimum ratio in external characteristics under various operating modes
Oil consumption is impossible.Because its power and rotating speed are changed in wide range, specific situation of change, because of use condition
And it is different.The starting of automobile, acceleration, upward slope and fully loaded engine when running at high speed work under heavy load, existing in China
Under most of Highway Conditions, 120 kilometers/hour of the case where running at high speed are continued to exceed with regard to very little.Traveling is on flat good road
When on face, 100 kilometers/hour or so of speed is maintained, still may be implemented in the car that engine is 1.6~2.0 discharge capacities
Cylinder traveling is closed in part.And in the case that load-carrying is few, engine is to work at part load, and the power of actual use is volume
Determine 30%-the 50% of power.Especially car, actual use power is 20%-the 30% of rated power.This is just to internal combustion
The economic performance of machine has a great impact.It should be evaluated under various operating modes by evaluating the quality of the economic performance of automobile simultaneously
Comprehensive economic performance.
The Load Regulation of vehicular petrol engine is come in fact into the aeration quantity in cylinder by changing throttle opening control
Existing.Driver determines that the size of throttle (throttle opening) realizes engine output to automobile according to pavement conditions in the process of moving
Power.Therefore, engine is run under unstable operating mode, at this moment residual waste gas quantity, cooling loss, air inflow and burning speed
Rate is all changing, so economy is also different therewith.Engine throttle door section is opened, and intake resistance, volumetric efficiency are increased
ηvHave dropped, and with the volumetric efficiency that increases of engine speed, decline more significantly.
Mechanical efficiency ηmAlso it is influenced by throttle opening, when partial throttling, with carrying for engine speed
Height, mechanical efficiency ηmSuppression ratio full throttle when want much faster.Mechanical efficiency changes with the variation of engine speed；
The smaller mechanical efficiency of throttle opening is also lower.It changes rule rate and also can be represented by the formula：
Wherein, η in formulai/ α values are declined slightly with the reduction of throttle opening, and for the ease of analysis, it is regarded as closely
Like constant；ηvFor volumetric efficiency；α is that (parameter is not substantially with rotation speed change for mixing ratio；)pmFor mean mechanical loss pressure (hair
Motivation mechanical loss and auxiliary body lose pressure).
When engine dry run, indicated work is completely consumed in mechanical friction loss, and at this moment mechanical efficiency is zero, i.e.,：
ηm=0
Then：
Pm=A ηvηi/α
Volumetric efficiency ηvWith mechanical efficiency ηmProduct determine engine torque curve shape.
It is indicated thermal efficiency η that the parameter of torque is influenced known to from formula (4)i, mechanical efficiency ηm, volumetric efficiency ηv, and it is excessive
Air coefficient α.The effective way for improving torque is to improve volumetric efficiency ηv, for engine in the slow-speed of revolution, throttle opening is small, fills
Gas efficiency etavLow indicated thermal efficiency ηiIt is declined slightly.Engine is in high rotating speed, due to shared crank angle and the intake and exhaust of burning
Pumping work(increases, and has an adverse effect to indicated thermal efficiency, so indicated thermal efficiency its value in intermediate a certain rotating speed is larger.
The basic reason of above-mentioned analytic explanation vehicular petrol engine economic performance difference is often in running on the lower load
Lower work.As can realizing that the discharge capacity for changing engine allows a part of deactivated mode, and allow another part cylinder larger negative
It works under lotus (throttle opening is 80% or so), so that it may with effective saving fuel oil.This is to improve vehicle gasoline engine economy
Effective way.Smaller from the throttle opening of petrol engine known to above-mentioned analysis, inflation performance is poorer, and economic performance is got over
Difference.The air throttle of different opening has different volumetric efficiency ηv, when throttle opening is centainly turned down subject throttle week by rotating speed
The air velocity on side is very high, should can be obtained by compressible fluid equation calculation by the air mass flow of section after air throttle：
Wherein, G is the mixed gas flow (kg/s) by air throttle；FkFor flow area (square public affairs at air throttle
Point).
The aeration quantity of four stroke gasoline engines can be calculated with following formula：
Wherein, ηvFor volumetric efficiency；VnFor engine displacement per cylinder (liter)；Υ0For atmospheric density (kilogram/cubic metre)；i
For number of cylinders；N is engine speed (rev/min).
The aeration quantity of engine known to preceding formula is the flow by air throttle.I.e.：Gx=G is closed by formula (5) and formula (6)
After and then：
In formula：λvFor the resistance coefficient before air throttle to valve, range between generally 1.8-2；λTFor air throttle resistance
Coefficient.
In a specific embodiment, the throttle opening of each cylinder is in the cylinder group of unlatching work herein：
70%-90%, certainly preferably 80% or so when, effects of energy saving and emission reduction is preferable.Air throttle is given herein by many experiments not
With the resistance coefficient under aperture, table 1 is referred to.
The mapping table of table 1 engine air throttle aperture and resistance coefficient
| θ | 00 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | 600 | 650 | 700 | 750 | 800 | 850 | 900 |
| λT | ∞ | 751 | 256 | 118 | 58.8 | 32.6 | 18.7 | 10.8 | 6.22 | 3.91 | 2.51 | 1.54 | 0.90 | 0.52 | 0.24 | 0.05 |
Clutch in the various embodiments described above can be by multiple structural forms, and following present a kind of specific embodiment parties
Formula, it is the structural schematic diagram of clutch in an embodiment of the present invention that concrete structure, which asks comprehensive reference Fig. 5, Fig. 5,.
In a specific embodiment, clutch can be set on the goat's horn 8 of drive axle, and clutch can wrap
The taper driving wheel 11 being fixedly installed on power output shaft 10 is included, taper driving wheel 11 includes conical section and circumferential tool in an axial direction
There are the outer spline section of fit engagement, conical section to be connected to the outside of outer spline section, the peripheral surface of conical section is nested with synchronous ring,
Synchronous ring has the inner peripheral surface that the outer surface with conical section matches, and the small end of conical section is close to wheel terminal pad 18.It needs
Bright, the one end that will be close to wheel terminal pad 18 herein is defined as outside, and one end far from wheel terminal pad 18 is defined as interior.
Clutch further includes the power output wheel 13 that power output shaft 10 is installed on by bearing, power output wheel 13 with
Wheel terminal pad 18 is fixedly connected, and the outside of power output wheel 13 is nested with engaging sleeve 14, engaging sleeve 14 and power output wheel 13,
Synchronous ring circumferentially limits, further include drive engaging sleeve 14 both can be opposite axial movement driving part, so as to external splines
Section engagement or separation.
Clutch provided in the specific embodiment, driving part driving engaging sleeve 14 move right, nibble in an axial direction
Trap 14 drives synchronous ring to move to right together, and under the action of synchronous ring, engaging sleeve 14 is gradually gradually synchronous with taper driving wheel 11,
When engaging sleeve 14 is moved to right end position, engaging sleeve 14 is steadily engaged with outer spline section, at this point, engaging sleeve 14 and power are defeated
Going out wheel 13, taper driving wheel 11 while engaging, the power of taper driving wheel 11 drives to power output wheel 13 by engaging sleeve 14,
It drives the wheel terminal pad 18 being fixedly connected with power output wheel 13 to rotate in turn, realizes that engine power is transferred to wheel；When
When engaging sleeve 14 is located at left end position, engaging sleeve 14 is detached with outer spline section, and power output shaft 10 is disconnected with wheel terminal pad 18
It opens, engine power cannot be transferred to wheel, therefore wheel is in sliding position.
In a specific embodiment, driving part include slide axially separation ring 16 on goat's horn 8 and with institute
It states separation ring 16 and is oppositely arranged and is fixed on the electromagnetic component 15 on goat's horn 8, separation ring 16 can pass through at least two circumferentially
A installation axle 20 is limited on goat's horn 8.16 nested power output shaft 10 of separation ring and the inside for being set to engaging sleeve 14, work as control
When device sends out the connection control instruction for disconnecting power drive mechanism and wheel terminal pad 18, electromagnetic component 15 is placed in the first work shape
State, separation ring 16 push engaging sleeve 14 to move out under the action of electromagnetic force, engaging sleeve 14 and tooth socket part from；Otherwise, electric
Magnet assembly 15 is placed in the second working condition, and the thrust detached between ring 16 and engaging sleeve 14 disappears, 14 return of engaging sleeve and and tooth
Groove portion engages.
Further, on the basis of the above embodiments, vehicle creep control system can also include being installed on engaging sleeve
The end of spring 17 between 14 and goat's horn 8, spring 17 can also directly can be indirectly secured to nibble by third member in fixation
Trap 14 or wheel terminal pad 18, spring 17 is axially retractable, when the spring 17 is in free elongation state, engaging sleeve 14
It is engaged with outer spline section.
Electromagnetic component 15 herein can be electromagnetic coil, when the solenoid is activated, under the action of electromagnetic force, point
Engaging sleeve 14 is driven from ring 16 and compressed spring moves downward, so that engaging sleeve 14 and outer spline section separation；When electromagnetic coil is disconnected
When electric, electromagnetic force disappears, and under the reply force effect of spring, engaging sleeve 14 pushes to the right synchronizing wheel 12 to move, and makes synchronizing wheel 12
Cone-shaped inner surface combined with the conical section outer surface of driving wheel to be formed synchronous rotation after be intermeshed.
Referring to FIG. 6, Fig. 6 is partial enlarged view at A in Fig. 5.
In the various embodiments described above, the peripheral wall of engaging sleeve 14 offers at least one radial through-hole, the outer end of radial through-hole
With internal thread part, radial through-hole is equipped with sealing screw 23, compression spring 24 and steel ball 22, the sealing screw 23 from the outside to the core
Outer surface corresponding position with the matched external thread part of the internal thread part, synchronous ring is provided with the appearance with steel ball 22
The recessed portion of face cooperation.
In the embodiment, steel ball 22 can realize that engaging sleeve 14 and the Fast Installation of synchronous ring between the two are fixed with recessed portion
Position.
A kind of vehicle creep control system provided by the present invention and control method are described in detail above.Herein
In apply specific case principle and implementation of the present invention are described, the explanation of above example is only intended to sides
Assistant solves the method and its core concept of the present invention.It should be pointed out that for those skilled in the art, not
, can be with several improvements and modifications are made to the present invention under the premise of being detached from the principle of the invention, these improvement and modification are also fallen into
In the protection domain of the claims in the present invention.
Claims (11)
1. a kind of vehicle sliding control method, which is characterized in that the control method is as follows：
Clutch, the clutch are set between wheel terminal pad and the power output end of power drive mechanism in advance
For in conjunction with or disconnect the wheel terminal pad and the power drive mechanism；
Detect the travel speed signal and throttle position signal of vehicle；
Vehicle Speed is calculated according to the travel speed signal, it is oily when the travel speed of vehicle is located at preset vehicle speed range
For door in when being totally released state, control clutch disconnects the connection of power drive mechanism and wheel terminal pad, makes at vehicle
In sliding state；
The engine of vehicle is multicylinder engine, and the quantity of cylinder is 2N, wherein N is the natural number more than or equal to 2；It should
Control method further comprises the steps：
When engine is in idling mode, the engine cylinder is divided into two groups, preceding 1 to N cylinders is first group, after
N+1 is second group to 2N cylinders, and the first cylinder group and the second cylinder group alternately open work.
2. vehicle sliding control method as described in claim 1, which is characterized in that disconnect the power drive mechanism and institute
While stating the connection of wheel terminal pad, the throttle of engine is automatically placed in throttle at idle state.
3. vehicle sliding control method as claimed in claim 2, which is characterized in that still further comprise following steps：
Be in sliding state in vehicle, when judge the throttle be in trample state when, control clutch engage institute
State power drive mechanism and wheel terminal pad.
4. vehicle sliding control method as claimed in claim 2, which is characterized in that still further comprise following steps：
Detect brake actuator position signal；
It is in sliding state in vehicle, when judging that the brake actuator is in skidding state, controls clutch
Mechanism engages the power drive mechanism and wheel terminal pad.
5. such as Claims 1-4 any one of them vehicle sliding control method, which is characterized in that open the cylinder group of work
In the throttle opening of each cylinder be：70%-90%.
6. a kind of vehicle creep control system, which is characterized in that including with lower component：
Clutch is set between wheel terminal pad and the output shaft of power drive mechanism, is used in conjunction with or disconnects the vehicle
Take turns terminal pad and the power drive mechanism；
Vehicle speed sensor, the travel speed signal for detecting vehicle；
Throttle sensor, for detecting throttle position signal；
Controller, including slide control module；
It is described to slide control module, Vehicle Speed is calculated according to the travel speed signal, when the travel speed position of vehicle
In preset vehicle speed range, in when being totally released state, control clutch disconnects power drive mechanism and is connected with wheel throttle
The connection of disk；
The engine of vehicle is multicylinder engine, and the quantity of cylinder is 2N, wherein N is the natural number more than or equal to 2；Institute
It states and slides the control module also further following control of progress：
When engine is in idling mode, the cylinder is divided into two groups, preceding 1 to N cylinders is the first cylinder group, rear N+
1 to 2N cylinders is the second cylinder group, and first cylinder group and second cylinder group alternately open work.
7. vehicle creep control system as claimed in claim 6, which is characterized in that
The throttle of engine is also further placed in idling oil by the control module that slides while disconnecting the clutch
Door state.
8. vehicle creep control system as claimed in claim 7, which is characterized in that the controller further includes accelerating control mould
Block, for carrying out control as follows：
In the case where vehicle is in planing case, when judging that brake actuator is in skidding state, control clutch engages institute
State power drive mechanism and the wheel terminal pad.
9. vehicle creep control system as claimed in claim 7, which is characterized in that still further comprise with lower component：
Brake actuator sensor, for detecting brake actuator position signal；
The controller further includes brake control module, to carry out control as follows：
In the case where vehicle is in planing case, when judging that the brake actuator is in skidding state, clutch is controlled
Engage the power drive mechanism and wheel terminal pad.
10. such as claim 6 to 9 any one of them vehicle creep control system, which is characterized in that open the cylinder group of work
In the throttle opening of each cylinder be：70%-90%.
11. vehicle creep control system as claimed in claim 6, which is characterized in that the clutch is set to drive axle
Goat's horn on.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410844024.5A CN104590011B (en) | 2014-12-30 | 2014-12-30 | Vehicle creep control system and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410844024.5A CN104590011B (en) | 2014-12-30 | 2014-12-30 | Vehicle creep control system and control method |
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| CN104590011B true CN104590011B (en) | 2018-09-11 |
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|---|---|---|---|---|
| CN102951154A (en) * | 2011-08-16 | 2013-03-06 | 福特全球技术公司 | A method of controlling a motor vehicle |
| CN102985726A (en) * | 2010-07-02 | 2013-03-20 | 五十铃自动车株式会社 | Coasting control system |
| CN103038531A (en) * | 2010-07-30 | 2013-04-10 | 五十铃自动车株式会社 | Coasting control device |
| CN103574015A (en) * | 2012-07-27 | 2014-02-12 | 通用汽车环球科技运作有限责任公司 | Clutch return spring pressure learning during a coasting maneuver |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5620169B2 (en) * | 2010-07-02 | 2014-11-05 | いすゞ自動車株式会社 | Coasting control device |
| CN204415139U (en) * | 2014-12-30 | 2015-06-24 | 浙江正奥汽配有限公司 | Vehicle sliding control system |
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2014
- 2014-12-30 CN CN201410844024.5A patent/CN104590011B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102985726A (en) * | 2010-07-02 | 2013-03-20 | 五十铃自动车株式会社 | Coasting control system |
| CN103038531A (en) * | 2010-07-30 | 2013-04-10 | 五十铃自动车株式会社 | Coasting control device |
| CN102951154A (en) * | 2011-08-16 | 2013-03-06 | 福特全球技术公司 | A method of controlling a motor vehicle |
| CN103574015A (en) * | 2012-07-27 | 2014-02-12 | 通用汽车环球科技运作有限责任公司 | Clutch return spring pressure learning during a coasting maneuver |
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