CN103899426A - Automatic closing/starting control device of internal combustion engine - Google Patents
Automatic closing/starting control device of internal combustion engine Download PDFInfo
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- CN103899426A CN103899426A CN201310643421.1A CN201310643421A CN103899426A CN 103899426 A CN103899426 A CN 103899426A CN 201310643421 A CN201310643421 A CN 201310643421A CN 103899426 A CN103899426 A CN 103899426A
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Abstract
The invention provides an automatic closing/starting control device of an internal combustion engine capable of guaranteeing the good driving performance of the vehicle and preventing the deterioration of the oil consumption amount. A control mode is related to the automatic closing of the internal combustion engine, and comprises an automatic closing permission mode of the internal combustion engine during the driving of the vehicle; an automatic closing not-permission mode, which forbids the automatic closing of the internal combustion engine during the driving of the vehicle and allows the automatic closing of the internal combustion enging during the parking of the vehicle. When the road surface of the driving vehicle is the low-friction road or the adverse rod, the internal combustion engine can be switched from the automatic closing permission mode during the driving to the automatic closing not-permission mode during the driving. When the road surface of the driving vehicle is the normal road surface, the above mentioned two modes are switched back.
Description
Technical field
The present invention relates to the device for control of automatic stopping starting of following internal-combustion engine: the rotating force that is applicable to the output shaft that makes internal-combustion engine is delivered to the vehicle of driving wheel, in the case of the internal-combustion engine stop condition of regulation is set up, carry out internal-combustion engine automatically stop process, in the case of the restarting condition of regulation is set up, carry out the restarting control of internal-combustion engine.
Background technique
In the vehicle using internal-combustion engine as driving source, according to reducing fuel consumption rate (fuel consumption) or reducing the viewpoint of conditioning, that need to carry out internal-combustion engine stops controlling (idle stop control) automatically.Idle stop control is following control: in the idle running of internal-combustion engine, in the time that the stop condition of regulation is set up, internal-combustion engine is stopped automatically, after this, in the time that the restarting condition of regulation is set up, make internal-combustion engine restarting.
But when by idle stop control as described above, internal-combustion engine stops or when restarting automatically, because the rotation of the output shaft of internal-combustion engine changes, the driving force that is applied to the driving wheel of vehicle can change.In this case, may there are the following problems: due to the variation of this driving force, and cannot suitably regulate by break control or traction control driving force or the braking force of vehicle, handling declines.
Therefore, prior art has proposed following technological scheme: in the case of carrying out above-mentioned break control or traction control, by forbid internal-combustion engine automatically stop process or restarting processing, the situation of avoiding the driving force of the driving wheel that is applied to vehicle to change, suppresses the decline of handling.
In addition, for example as Patent Document 1, also proposed to carry out the vehicle of the as described below middle idle stop control of travelling, this travel middle idle stop control by the travelling speed of vehicle for example, lower than the Conditional Include that is greater than 0 fixing speed (20km/h) in the automatic stop condition of internal-combustion engine.According to so middle idle stop control of travelling, can make the self-braking operation range of internal-combustion engine expand, can make the fuel consumption reduction effect of internal-combustion engine further improve.
But, in the travelling of vehicle, when internal-combustion engine stops or when restarting, because the rotating force of the output shaft of internal-combustion engine is to driving wheel transmission, may cause the rotational speed of driving wheel sharply to change.In this case, may there are the following problems: due to skidding or locking of driving wheel occurring, cause the manipulation stability decreases of vehicle, handling declines.Particularly Vehicle Driving Cycle surface friction coefficient lower freeze the low coefficient of friction roads such as road surface (so-called low μ road) or poor road (refer to state difference concavo-convex owing to existing, road surface, the difficult road that travels of vehicle, below identical.) situation under, when carrying out under steam stopping or when restarting, therefore and easily skidding or locking of driving wheel can occurring of internal-combustion engine.
About this point, in the control gear of recording at patent documentation 1, in the vehicle of middle idle stop that can travel, according to the steering angle of the vehicle detecting and the speed of a motor vehicle, in the situation that will there is wheel-slip, combustion motor stop with restarting at least any one restrict.Particularly, by when the internal-combustion engine restarting, suppress the rising of the moment of torsion transmitting to driving wheel, thus, the skidding of the driving wheel while suppressing to restart step.
[prior art document]
[patent documentation 1] TOHKEMY 2010-285961 communique
Summary of the invention
But, in the prior art described in patent documentation 1, according to the steering angle of the vehicle detecting and the speed of a motor vehicle, meeting is caused to the situation of wheel-slip judges, to the internal-combustion engine in travelling stop or restarting limits.Therefore, in fact, idle stop in the time middle idle stop not occurring also to forbid travelling in the such region of wheel-slip (situation) and stop.In addition, do not have in intentional situation the driver of vehicle, the restarting that carries out internal-combustion engine recovers.Thus, there are the following problems: cannot not only guarantee the good rideability of vehicle but also prevent the deterioration of the fuel consumption of vehicle.
The present invention completes in order to solve above-mentioned problem just, its object is to provide a kind of device for control of automatic stopping starting of internal-combustion engine, and this device for control of automatic stopping starting can guarantee that the good rideability (guaranteeing the product performance in travelling) of vehicle can prevent that again the fuel consumption of vehicle from worsening.
In order to solve the above problems, the rotating force that the device for control of automatic stopping starting of internal-combustion engine of the present invention is used in the output shaft that makes internal-combustion engine (3) is delivered on the vehicle of driving wheel (DW), in the case of the internal-combustion engine stop condition of regulation is set up, carry out internal-combustion engine (3) automatically stop process, in the case of the restarting condition of regulation is set up, carry out the restarting processing of internal-combustion engine (3), the device for control of automatic stopping starting of this internal-combustion engine has: control unit (2), its for controlling combustion engine (3) automatically stop process and restarting processing, and pavement behavior judging unit (2), it judges the situation on the road surface that vehicle travels, as control unit (2) performed to internal-combustion engine (3) automatically stop relevant control mode, comprising: suspension of licence pattern automatically in self-braking the travelling of the middle license internal-combustion engine of travelling of vehicle (3), automatically stop disapproving pattern with disapproving automatically stopping of internal-combustion engine (3) and permit during only at vehicle stop in self-braking the travelling of internal-combustion engine in the travelling of vehicle, control as follows: in the judgement of the performed pavement behavior of pavement behavior judging unit, the situation that is judged as this road surface be low coefficient of friction road or ill-roaded during, by to internal-combustion engine automatically stop relevant control mode from travel automatically suspension of licence mode altering for automatically stopping disapproving pattern in travelling, and return to common road surface from low coefficient of friction road or poor road in the situation that is judged as road surface, make to internal-combustion engine automatically stop relevant control mode from travel, automatically stop the pattern that disapproves turn back to travel in automatic suspension of licence pattern.
In the device for control of automatic stopping starting of internal-combustion engine of the present invention, the situation that judges the road surface that vehicle travels be low coefficient of friction road or ill-roaded during, will change to disapprove under steam internal-combustion engine self-braking and automatically stop disapproving pattern to the relevant control mode that automatically stops of internal-combustion engine.Thus, owing to can be only freezing in the low coefficient of friction roads such as road surface or concavo-convex many ill-roaded situations being judged as vehicle actual travel, what disapprove internal-combustion engine in travelling stops (forbidding idle stop) automatically, therefore, the good rideability (guaranteeing the product performance in travelling) of vehicle can be guaranteed, and the deterioration of the fuel consumption of vehicle can be effectively prevented.
In addition, control as follows: return to common road surface from low coefficient of friction road or poor road in the situation that is judged as road surface, make to internal-combustion engine automatically stop relevant control mode from travel, automatically stop the pattern that disapproves turn back to travel in automatic suspension of licence pattern.,, even in the case of will change to and automatically stop disapproving pattern to the relevant control mode that automatically stops of internal-combustion engine, from low coefficient of friction road or ill-roaded recovery judgement, also can again switch to automatic suspension of licence pattern by carrying out.Thus, in guaranteeing the good rideability of vehicle, can also further improve the fuel consumption of vehicle.
In the device for control of automatic stopping starting of above-mentioned internal-combustion engine, there is vehicle-wheel speed sensor (75), the rotational speed of each wheel that vehicle-wheel speed sensor (75) detection vehicle has, pavement behavior judging unit is according to the checkout value of vehicle-wheel speed sensor (75), detect in the time that vehicle accelerates the slippery going state of driving wheel (DW) in idling conditions or during at vehicle deceleration driving wheel (DW) in rotating the locking travelling state of halted state, in the situation that detecting that slippery going state or locking travelling state continued for the 1st time (T1), the situation that is judged as road surface is low coefficient of friction road, the in the situation that of slippery going state or locking travelling state not detected and detect that vehicle was once stopping within the 2nd time (T2), the situation that is judged as road surface returns to common road surface from low coefficient of friction road.
According to this structure, due to the slippery going state of checkout value or the endurance of locking travelling state of basis based on vehicle-wheel speed sensor, detect travelling of low coefficient of friction road, therefore, can suitably carry out the road surface that vehicle travels is the judgement of low coefficient of friction road.In addition, even set for after low coefficient of friction road automatically stop disapproving pattern in travelling in the situation that detecting, also can be using the stop condition of vehicle as necessary and automatically stop disapproving pattern recovery to suspension of licence pattern automatically in travelling from travel.Thus, can effectively prevent the deterioration of the fuel consumption of vehicle.In addition,, due to till when vehicle stop, automatically stop disapproving pattern in can continuing to travel, therefore, can guarantee the good rideability of vehicle.
And then, in this case, above-mentioned the 2nd time (T2) can be set for than the above-mentioned long time of the 1st time (T1).Like this, by being set for to the time longer than the 1st time the 2nd time, can from travel, automatically stop disapproving pattern recovery with the long time for automatic suspension of licence pattern in travelling.Therefore, can return to more reliably travel in automatic suspension of licence pattern.
In addition, in the device for control of automatic stopping starting of above-mentioned internal-combustion engine, can have: the speed of a motor vehicle detection unit (73) that detects the speed of a motor vehicle; and the accelerator open degree detection unit (72) of detection accelerator open degree, pavement behavior judging unit is detecting in the scope (V1≤V≤V2) of the speed of a motor vehicle being detected by speed of a motor vehicle detection unit (73) in fixing speed, the accelerator open degree (AP) being detected by described accelerator open degree detection unit (72) is in the scope of regulation aperture (AP1≤AP≤AP2), the variance ratio (Δ AP) of the accelerator open degree being detected by accelerator open degree detection unit (72) is in the scope of regulation variance ratio (Δ AP≤Δ AP1), and, in the 3rd time (T3), the acceleration-deceleration (Δ G) of the vehicle of the speed of a motor vehicle based on being detected by speed of a motor vehicle detection unit (73) exceedes the variation of defined threshold (Δ G1) in the situation that stipulated number (N) is above, the situation that is judged as road surface is poor road, in the case of being never judged as the situation on described road surface is that described poor road works the 4th time (T4) of passing through and detects that vehicle was once stopping, the situation that is judged as road surface returns to common road surface from poor road.
According to this structure, due to according to the speed of a motor vehicle and accelerator open degree with and variance ratio detect and travel ill-roaded, therefore, can suitably carry out the road surface that vehicle travels is ill-roaded judgement.In addition, set for after poor road automatically stop disapproving pattern in travelling in the situation that detecting, can be using the stop condition of vehicle as necessary and automatically stop disapproving pattern recovery to suspension of licence pattern automatically in travelling from travel.Thus, can effectively prevent the deterioration of the fuel consumption of vehicle.In addition,, due to till when vehicle stop, automatically stop disapproving pattern in can continuing to travel, therefore, can guarantee the good rideability of vehicle.
In this case, above-mentioned the 4th time (T4) can be set for than the above-mentioned long time of the 3rd time (T3).Like this, by being set for to the time longer than the 3rd time the 4th time, can from travel, automatically stop disapproving pattern recovery with the longer time for automatic suspension of licence pattern in travelling.Therefore, can return to more reliably travel in automatic suspension of licence pattern.
In addition, in the device for control of automatic stopping starting of above-mentioned internal-combustion engine, can have: the gear (6) of stepless, its rotation to described internal-combustion engine (3) is carried out exporting after speed change; And output shaft (25), it is exported by the rotation after described gear (6) speed change to driving wheel (DW) side, and the judgement of the performed pavement behavior of pavement behavior judging unit is that the checkout value obtaining according to the value detecting based on the rotation of output from output shaft (25) to driving wheel (DW) side carries out.In addition, in this case, the gear of stepless can be the stepless speed changing mechanism (6) of belt.
Thus, owing to carrying out the judgement of the pavement behavior Vehicle Driving Cycle according to the checkout value detecting based on obtaining to the value of the rotation of driven wheel side output from the output shaft of the gear of stepless, therefore, can detect more accurately the pavement behavior that vehicle travels.In addition, the stepless speed changing mechanism that is belt at the gear of stepless, detect more accurately the pavement behavior that vehicle travels, thus, can effectively prevent skidding of band etc., effectively protect the each several part of gear.
In addition, the symbol in above-mentioned parantheses is the symbol that exemplifies the structural element in mode of execution described later as of the present invention.
According to the device for control of automatic stopping starting of internal-combustion engine of the present invention, only be judged as vehicle actual travel low coefficient of friction road or ill-roaded during, disapprove automatically stopping of internal-combustion engine in travelling, and, by carrying out from low coefficient of friction road or ill-roaded recovery judgement, thereby automatically stopping of the internal-combustion engine of license in travelling again, thus, can either guarantee that the good rideability (guaranteeing the product performance in travelling) of vehicle can prevent again the deterioration of the fuel consumption of vehicle.
Accompanying drawing explanation
Fig. 1 is the frame diagram that the drive system of the vehicle of the device for control of automatic stopping starting of the internal-combustion engine with embodiments of the present invention is shown.
Fig. 2 is the Block Diagram that automatically stops the ECU controlling that carries out internal-combustion engine.
Fig. 3 is Rule of judgment for low coefficient of friction road is described and the table of condition subsequent.
Fig. 4 is the table for ill-roaded Rule of judgment and condition subsequent are described.
Fig. 5 is the flow chart that the judgement order of the middle idle stop license of travelling is shown.
Fig. 6 is the flow chart that the judgement order of low coefficient of friction road is shown.
Fig. 7 is illustrated in the sequential chart that time of the each value in the situation of middle idle stop control of implementing to travel changes.
Fig. 8 is illustrated in the sequential chart that time of the each value in the situation of other patterns of the middle idle stop control of implementing to travel changes.
Fig. 9 is illustrated in the sequential chart that time of the each value in the situation of middle idle stop control that do not have to implement to travel changes.
Label declaration
3 motors
3a bent axle
4 torque-converters
4a pump impeller
4b turbine
4c lock-up clutch
5 forward-reverse switching mechanisms
6 stepless speed variators
11 planetary gear system
12 forward clutch
13 retreat break
14 input shafts
21 main shafts
22 input belt wheels
22a movable part
22b fixing part
23 output pulleys
23a movable part
23b fixing part
23d Returnning spring
24 driving belts
25 countershafts
25a gear
71 engine rotation speed sensors
72 accelerator open degree sensors
73 vehicle speed sensor
74 brake sensors
75 vehicle-wheel speed sensors
DF differential gear train
DW driving wheel
G gear
IG1 idler gear
IS pony axle
Specific embodiment mode
Below, with reference to accompanying drawing, embodiments of the present invention are described.The drive system of the vehicle shown in Fig. 1 has as the internal-combustion engine of the power source of vehicle (hereinafter referred to as " motor ") 3, for the left and right sidesing driving wheel DW(figure to vehicle, right driving wheel is only shown) transmit torque-converters 4, forward-reverse switching mechanism 5 and the stepless speed variator (CVT) 6 of driving force of motor 3.Motor 3 is petrol engines, has the bent axle 3a for output drive strength.
Torque-converters 4 has pump impeller 4a, turbine 4b and lock-up clutch 4c.It is upper that pump impeller 4a is bound up on bent axle 3a, and turbine 4b is bound up on input shaft 14 described later, between both 4a, 4b, is filled with working oil.Substantially, the driving force of motor 3 (hereinafter referred to as " engine-driving power ") is passed to input shaft 14 by pump impeller 4a, working oil and turbine 4b.
Forward-reverse switching mechanism 5 has planetary gear system 11, forward clutch 12 and retreats break 13.Planetary gear system 11 is single pinion type, in the multiple planetary pinion 11c(figure that engage, only illustrates two by sun gear 11a, gear ring 11b, with two gear 11a, 11b) and form with the planet carrier 11d that the mode freely of rotating supports these planetary pinions 11c.Sun gear 11a is arranged on input shaft 14 integratedly.
Forward clutch 12 is oil pressure type clutches, and its inside is arranged on input shaft 14 integratedly, and the outside of forward clutch 12 is arranged on gear ring 11b and main shaft 21 integratedly.Main shaft 21 is formed hollow shape, and input shaft 14 is freely disposed in sideway swivel therein.By engaging forward clutch 12, input shaft 14 directly connects with main shaft 21, by separating forward clutch 12, allows the rotation between input shaft 14 and main shaft 21 poor.In addition, retreat break 13 and formed by the clutch of hydraulic type etc., be installed in planet carrier 11d upper, when in jointing state, support planet carrier 11d in not revolvable mode, when in separated state, allow planet carrier 11d rotation.
In the forward-reverse switching mechanism 5 of said structure, in the time that vehicle advances, joint forward clutch 12 and separation retreat break 13.Thus, main shaft 21 and input shaft 14 with identical rotating speed to equidirectional rotation.On the other hand, in the time of vehicle rollback, separation forward clutch 12 and joint retreat break 13.Thus, main shaft 21 is to the direction rotation contrary with input shaft 14.
Stepless speed variator 6 is belt, has above-mentioned main shaft 21, input belt wheel 22, output pulley 23, driving belt 24 and countershaft 25.Input belt wheel 22 has movable part 22a respect to one another and fixing part 22b.Movable part 22a is can move on its axial direction but can not counterrotating mode be installed on main shaft 21, and fixing part 22b is fixed on main shaft 21.Between both 22a, 22b, be formed for the trough of belt of the V word shape that is wound around driving belt 24.In addition, be provided with DR grease chamber (not shown) on movable part 22a, by supplying with oil pressure to this DR grease chamber, movable part 22a moves on axial direction, thus, changes the belt wheel width of input belt wheel 22, and its effective diameter changes.
As described above, in stepless speed variator 6, by supplying with oil pressure to the input DR grease chamber of belt wheel 22 and the DN grease chamber of output pulley 23, infinitely change the effective diameter of two belt wheels 22,23, thus, its gear ratio is carried out to stepless control.This gear ratio is the ratio of the input rotating speed of belt wheel 22 and the rotating speed of output pulley 23.
In addition, be fixed with gear 25a on countershaft 25, this gear 25a, by being arranged on integratedly big or small idler gear IG1, the IG2 on pony axle IS, engages with the gear G of differential gear train DF.Differential gear train DF is bound up on the driving wheel DW of left and right.
In the drive system of above structure, engine-driving power, by torque-converters 4, forward-reverse switching mechanism 5, stepless speed variator 6 and differential gear train DF, is delivered to the driving wheel DW of left and right.Now, by forward-reverse switching mechanism 5, between forward direction and reverse direction, switch the sense of rotation of the driving force being passed, carry out thus the forward/backward of vehicle.In addition, undertaken, under infinite variable speed state, engine-driving power being delivered to driving wheel DW by stepless speed variator 6.
In addition, as shown in Figure 2, the ECU(control unit for control engine 3 or speed changer 6 has been installed on vehicle) 2.ECU2 is made up of microcomputer, and this microcomputer is made up of I/O interface, CPU, RAM and ROM etc.From engine rotation speed sensor 71, the testing signal of the rotating speed that represents motor 3 is outputed to ECU2.In addition, from accelerator open degree sensor 72, the testing signal of the operation amount (hereinafter referred to as " accelerator open degree ") of the gas pedal (not shown) of expression vehicle is outputed to ECU2.In addition represent, the testing signal of the speed of a motor vehicle of vehicle from vehicle speed sensor 73 outputs.In addition operate, the testing signal of (amount of treading in of brake pedal) from brake sensor 74 output brakes.In addition export, the testing signal of four wheels wheel velocity separately from detecting the vehicle-wheel speed sensor 75 of four wheels wheel velocity separately.In addition export, the testing signal of the acceleration-deceleration of vehicles from acceleration/deceleration sensor (G sensor) 76.In addition, though the diagram of omission, the gear position sensor of the gear that detects AT, the steering angle sensor of steering angle and the external air temperature sensor of detection external air temperature etc. of detection steering wheel be also provided with.
ECU2 is according to from the testing signal of above-mentioned various sensors 71～76, according to the control program being stored in ROM, and the action of control engine 3.Especially ECU2 carries out the idle stop control (automatically stopping controlling) of motor 3.Idle stop control is following control: in the running of motor 3, in the case of the stop condition of regulation is set up, motor 3 is stopped automatically, after this, in the case of the restarting condition of regulation is set up, make motor 3 restartings.Thus, can obtain the effect of the fuel consumption that reduces motor 3.In addition, here, the stop condition of motor 3 is made as and has carried out the situation of brake service and the travelling speed of vehicle lower than for example, than the situation of 0 large fixing speed (, 20km/h).Thus, before vehicle parking, also make motor 3 automatically stop, and only permit the situation of the idle stop control of motor 3 to compare when the vehicle parking, can expand and make the self-braking operation range of motor 3.Thus, can improve the effect that reduces fuel consumption.
Here, the particular content of the idle stop control of the motor 3 of the vehicle to present embodiment is described in detail.In the idle stop control of the motor 3 of the vehicle of present embodiment, as control mode, the middle idle stop that travels that travels middle idle stop Licensing Model and disapprove the idle stop of motor 3 in the travelling of vehicle that is included in the idle stop of the middle license motor 3 of travelling of vehicle disapproves pattern.Particularly, carry out the control of following (1)～(4) by the idle stop control of motor 3.
(1) be in low coefficient of friction road (low μ road) or ill-roaded situation being judged as the road surface that vehicle travels, set to the idle stop control relevant control mode of the middle idle stop prohibited mode of travelling of middle idle stop as motor 3 of forbidding travelling.
(2) if start to travel from vehicle play vehicle stop till during, the low coefficient of friction road or the poor road that travel above-mentioned detected, thereby be set as travelling middle idle stop prohibited mode, after this, until vehicle once stopped, the setting of the middle idle stop prohibited mode that continues to travel.
(3) road surface that vehicle travels be whether low coefficient of friction road judgement carry out in the following way: according to the checkout value of vehicle-wheel speed sensor 75, front-wheel wheel velocity and trailing wheel wheel velocity are compared, front-wheel slipping state or front wheel locking state are judged.
(4) whether the road surface that vehicle travels is that ill-roaded judgement is carried out in the following way: according to the checkout value of acceleration-deceleration sensor (G sensor) 76, the variation (G variation) of the acceleration-deceleration of the vehicle of supervision in travelling, counts the changing number of the acceleration-deceleration in the stipulated time.
Fig. 3 is Rule of judgment for low coefficient of friction road (low μ road) is described and the table of condition subsequent.Skidding in judgement and locking judgement of wheel, calculate difference in wheel speed Δ V according to the wheel velocity of detected by vehicle-wheel speed sensor 75 four wheels.Difference in wheel speed Δ V calculates by following formula (1).
Difference in wheel speed Δ V=(front-wheel average wheel speed Vf)-(trailing wheel average wheel speed Vr) (formula 1)
Then, make being delivered to front-wheel (driving wheel) from the driving force of motor 3 under the state of vehicle acceleration, in the case of (Δ V≤Δ V1) more than the value of above-mentioned difference in wheel speed Δ V becomes specified value Δ V1, be judged as the slipping state of front-wheel (driving wheel).Be set forth in object lesson in this case, comprising and non-ly freezing road surface and freeze the two road of road surface at Vehicle Driving Cycle, when road surface that front-wheel is walked is changed into non-while freezing road surface from freezing road surface, the earth-grasping force of front-wheel sharply increases, and average wheel speed Vf drops to the value that approaches 0.Thus, more than the value of difference in wheel speed Δ V becomes specified value Δ V1.
On the other hand, being applied to front-wheel (driving wheel), the braking force of break makes under the state of vehicle deceleration, in the case of (Δ V≤Δ V2) below the value of above-mentioned difference in wheel speed Δ V becomes other specified value Δ V2, be judged as the lockup state of front-wheel (driving wheel).Be set forth in object lesson in this case, comprising and non-ly freezing road surface and freeze the two road of road surface at Vehicle Driving Cycle, under state (stepping on the state of brake petal) at the Braking of break at front-wheel, change into while freezing road surface from the non-road surface of freezing on the road surface of walking at front-wheel, the earth-grasping force of front-wheel sharply declines, and the braking force of break becomes the state exceeding from the earth-grasping force on road surface.Now, because front-wheel average wheel speed Vf moment becomes 0 or very approach 0 value, thus, the value of difference in wheel speed Δ V becomes below specified value Δ V2.
In addition,, although the situation that is f-w-d vehicle to vehicle here (situation that front-wheel is driving wheel) is illustrated, but in the situation that vehicle is rear wheel drive vehicle, trailing wheel is driving wheel, the in the situation that of four-wheel drive vehicle, front and back wheels is driving wheel.
In addition the road surface that, vehicle travels is that the Rule of judgment (low coefficient of friction road judgement symbol Fa=0 → 1) of low coefficient of friction road (low μ road) is according to (a) below～(c) carry out.(a) front-wheel skids.(b) four wheels skid.(c) front wheel locking.Any one lasting stipulated time (the 1st time) in these (a)～(c) more than T1, be judged as Vehicle Driving Cycle on low coefficient of friction road.In addition,, as an example, above-mentioned stipulated time (the 1st time) T1 can be: T1=0.05(second).
On the other hand, the condition subsequent (low coefficient of friction road judgement symbol Fa=1 → 0) of low coefficient of friction road judgement is according to (d) below～(f) carry out.(d) front-wheel does not skid.(e) four wheels do not skid.(f) front-wheel does not have locking.These (d)～(f) all duration T, more than 2 and the in the situation that vehicle was once stopping, thinking that vehicle has no longer travelled on low coefficient of friction road, remove the judgement of low coefficient of friction road.In addition,, as an example, above-mentioned time T 2 is: T2=1.0(second).
Fig. 4 is the table for ill-roaded Rule of judgment and condition subsequent are described.As shown in the table in Fig. 4, ill-roaded Rule of judgment (poor road judgement symbol Fb=0 → 1) foundation (g) below, (h) carries out.,, in the situation that (g) and (h) two sides set up, be judged as Vehicle Driving Cycle on poor road.
(g) can be judged as Vehicle Driving Cycle at ill-roaded state.Particularly, at the vehicle velocity V being detected by vehicle speed sensor 73 (V1≤V≤V2) in predetermined range, and, the accelerator open degree AP being detected by accelerator open degree sensor 72 is regulation aperture AP1 following (AP≤AP1), and the variation delta AP of accelerator open degree AP is regulation variation delta AP1 following (Δ AP≤Δ AP1).Here, as an example, above-mentioned V1 can be V1=10(km/h), as an example, V2 can be V2=70(km/h), as an example, AP1 can be AP1=4/8, as an example, Δ AP1 can be Δ AP1=0.4/8.
(h) at the appointed time, in (the 3rd time) T3, variance ratio (G variation) the Δ G of the acceleration-deceleration of vehicle exceedes specified value Δ G1(Δ G≤Δ G1) situation more than stipulated number N time.Here, as an example, Δ G1 can be Δ G1=0.4G, and as an example, the stipulated time (the 3rd time), T3 can be T3=5(second), as an example, stipulated number N can be N=60(time).
On the other hand, ill-roaded judge condition subsequent (poor road judgement symbol Fb=1 → 0) for (i) from become be not judged as Vehicle Driving Cycle ill-roaded state after stipulated time (the 4th time) T4, and, in the situation that vehicle had once stopped, removing poor road judgement.Stipulated time (the 4th time) T4 here can be T4=30(second as an example).
Fig. 5 illustrates that the middle idle stop that travels travelling in middle idle stop control permitted the flow chart of decidable order.During idle stop license is judged under steam, first, judge whether the break of vehicle opens (step ST1-1).The judgement whether break is opened is carried out according to the checkout value of brake sensor 74.Consequently, if break is not opened (no), break is in off working state, and the middle idle stop that travels disapproves the judgement (step ST1-2) of (forbidding).On the other hand, if break is opened (YES), then judge whether throttle closes (step ST1-3).The judgement whether throttle closes is carried out according to the checkout value of accelerator open degree sensor 72.Consequently, if throttle is not closed (no), throttle is opened, the judgement (step ST1-2) that the middle idle stop that travels is forbidden.On the other hand, if throttle is closed (YES), then, judge whether vehicle travels at low coefficient of friction road (step ST1-4).Consequently, (YES) in the situation that being judged as Vehicle Driving Cycle at low coefficient of friction road, the judgement (step ST1-2) that the middle idle stop that travels is forbidden.On the other hand, in the situation that being judged as vehicle and not travelling at low coefficient of friction road (no), then, judge vehicle whether travel on poor road (step ST1-5).Consequently, be judged as Vehicle Driving Cycle (YES) in ill-roaded situation, the judgement (step ST1-2) that the middle idle stop that travels is forbidden.On the other hand, in the situation that being judged as vehicle and not travelling on poor road (no), the judgement (step ST1-6) of the middle idle stop license of travelling.
Fig. 6 illustrates to carry out whether the travel flow chart of the order of judging at the low coefficient of friction road of the judgement of low coefficient of friction road of vehicle.In this low coefficient of friction road is judged, judge whether the road surface that vehicle is current travelled is low coefficient of friction road (low μ road) (step ST2-1).Consequently, be (YES) low coefficient of friction road in the case of being judged as the road surface that vehicle is current travelled, then, judge whether vehicle once stopped (step ST2-2).Consequently, if vehicle did not once stop (no), be continuously the judgement (step ST2-3) of low coefficient of friction road (low μ road), if vehicle was once stopping (YES), remove the judgement for low coefficient of friction road, make as the judgement (step ST2-4) on road surface conventionally.
On the other hand, in step ST2-1 above, not (no) low coefficient of friction road in the case of being judged as the road surface that vehicle is current travelled, then, judge whether wheel is slipping state (step ST2-5).Consequently, if wheel is slipping state (YES), being judged to be is low coefficient of friction road (step ST2-6), if wheel is not slipping state (no), then, judges whether wheel is lockup state (step ST2-7).Consequently, if wheel is lockup state (YES), being judged to be is low coefficient of friction road (step ST2-6), if wheel is not lockup state (no), is judged to be common road surface (step ST2-8).
Fig. 7 is illustrated in the sequential chart that time of the each value in the situation of middle idle stop control of implementing to travel changes.In Fig. 7 and Fig. 8 described later, 9 sequential chart, show respectively the open and close, accelerator open degree, the speed of a motor vehicle, the ratio of stepless speed variator (CVT) 6, operating condition, motor 3 and the torque-converters 4(turbine of motor 3 of brake switch) rotating speed, lock-up clutch (LC) pressure, FWD clutch pressure, driven belt wheel load, the variation of rotating band wheel load.As shown in Figure 7, implementing travel middle idle stop control in the situation that, during to lock-up clutch 4c being the moment t1-1 of state of unlatching, the operating condition of motor 3 is the state of deceleration fuel cutoff (FC).Then,, when becoming after disconnection at moment t1-1 lock-up clutch 4c, the operating condition of motor 3 becomes idling mode.After this,, when at moment t1-2, under vehicle velocity V=10km/h, after the middle idle stop permissive condition that travels is set up, the operating condition of motor 3 becomes idle stop state (the middle idle stop state of travelling).After this, in the time of moment t-3, after the middle idle stop canceling condition of travelling is set up, motor 3 carries out restarting.
Fig. 8 is illustrated in the sequential chart that time of the each value in the situation of other patterns of the middle idle stop of implementing to travel changes.As shown in Figure 8, in other patterns of the middle idle stop that conventionally travels, the operating condition of motor 3 is not directly transferred to idle stop state through idling mode from deceleration fuel cutoff state., till during lock-up clutch 4c is the moment t2-1 of state engaging, be deceleration fuel cutoff state.Then,, when moment t2-1 lock-up clutch 4c is disconnected, the middle idle stop permissive condition that travels under speed of a motor vehicle 10km/h becomes idle stop state (the middle idle stop state of travelling) after setting up.After this, in the time of moment t2-2, after the middle idle stop canceling condition of travelling is set up, motor 3 carries out restarting.
Fig. 9 is illustrated in the sequential chart that time of the each value in the situation of middle idle stop control that do not have to implement to travel changes.As shown in Figure 9, in the situation that not implementing to travel middle idle stop control, during to lock-up clutch 4c being the moment t3-1 of state of joint, the state that the operating condition of motor 3 is deceleration fuel cutoff.Then,, when becoming after disconnection at moment t3-1 lock-up clutch 4c, the operating condition of motor 3 becomes idling mode.After this, due at moment t3-2 vehicle stop (vehicle velocity V=0km/h), therefore, the operating condition of motor 3 becomes idle stop state.After this,, owing to again starting to travel at moment t3-3 vehicle, therefore, motor 3 carries out restarting.
As mentioned above, as the control mode relevant to the idle stop (automatically stopping) of motor 3, the device for control of automatic stopping starting of the motor 3 of present embodiment comprises: the middle idle stop Licensing Model that travels of the idle stop of the middle license motor 3 of travelling of vehicle (in travelling automatically suspension of licence pattern); With in the travelling of vehicle, disapprove automatically stopping of motor 3 and permit the self-braking middle idle stop that travels of motor 3 to disapprove (forbidding) pattern (automatically stopping disapproving pattern in travelling) during only at vehicle stop.In addition, control as follows: the situation that is judged as the road surface that vehicle travels be low coefficient of friction road or ill-roaded during, to change to the middle idle stop that travels and disapprove pattern to the relevant control mode idle stop Licensing Model from travel that automatically stops of motor 3, and, revert to common road surface from low coefficient of friction road or poor road in the situation that is judged as road surface, make to disapprove pattern and turn back to the middle idle stop Licensing Model that travels to the relevant control mode idle stop from travel that automatically stops of motor 3.
; the situation that is judged as the road surface that vehicle travels be low coefficient of friction road or ill-roaded during, will change to the self-braking middle idle stop that travels that disapproves under steam motor 3 and disapprove pattern to the relevant control mode that automatically stops of motor 3.Thus, owing to only freezing in the low coefficient of friction roads such as road surface or concavo-convex many ill-roaded situations being judged as vehicle actual travel, what disapprove motor 3 in travelling stops (forbidding the idle stop in travelling) automatically, therefore, the good rideability (guaranteeing the product performance in travelling) of vehicle can be guaranteed, and the deterioration of the fuel consumption of vehicle can be effectively prevented.
In addition, control as follows: return to common road surface from low coefficient of friction road or poor road in the situation that is judged as road surface, make to motor 3 automatically stop relevant control mode from travel, automatically stop the pattern that disapproves turn back to travel in automatic suspension of licence pattern.,, even in the case of will change to and automatically stop disapproving pattern to the relevant control mode that automatically stops of motor 3, from low coefficient of friction road or ill-roaded recovery judgement, can again switch to automatic suspension of licence pattern by carrying out.Thus, in guaranteeing the good rideability of vehicle, can also further improve the fuel consumption of vehicle.
In addition, due to according to the endurance of the slippery going state of checkout value based on vehicle-wheel speed sensor 73, detect the travelling of low coefficient of friction road, therefore, can suitably carry out the road surface that vehicle travels is the judgement of low coefficient of friction road.In addition, due to according to the speed of a motor vehicle and accelerator open degree with and variance ratio detect and travel ill-roaded, therefore, can suitably carry out the road surface that vehicle travels is ill-roaded judgement.In addition, even if detecting set the middle idle stop that travels for after low coefficient of friction road or poor road and disapprove pattern in the situation that, also can using the stop condition of vehicle as necessary and from travel idle stop disapprove pattern recovery to the middle idle stop Licensing Model that travels.Thus, can effectively prevent the deterioration of the fuel consumption of vehicle.In addition, due to till when vehicle stop, the middle idle stop that can continue to travel disapproves pattern, therefore, can guarantee the good rideability of vehicle.
In addition, in the present embodiment, have to the rotation of motor 3 carry out speed change output stepless speed changer 6 and by the rotation by after speed changer 6 speed changes the output shaft 25 to driving wheel DW side output, the judgement of the pavement behavior that pavement behavior judging unit carries out is to carry out according to the checkout value obtaining the value of rotation based on the output from output shaft 25 to driving wheel DW side is detected (speed of a motor vehicle being detected by vehicle speed sensor 73 particularly, and the wheel velocity that detected by vehicle-wheel speed sensor 75 etc.).
According to this structure, according to the action of the output of the output shaft 25 of the speed changer 6 based on from stepless, detect the pavement behavior in Vehicle Driving Cycle, thus, can detect more accurately pavement behavior.In addition; in the present embodiment; the stepless speed variator that the speed changer 6 of stepless is belt; according to the pavement behavior in travelling, the permission/license of the idle stop in Vehicle Driving Cycle is switched; wherein, this pavement behavior in travelling is to detect according to the action of the output of the output shaft 25 based on from speed changer 6, thus; can effectively prevent that the band that the speed changer 6 of stepless occurs from skidding, and can effectively protect the each several part of this speed changer 6.
Above, although embodiments of the present invention are illustrated,, the present invention is not limited to above-mentioned mode of execution, in the scope of the technological thought described in claims and specification and accompanying drawing, can carry out various distortion.For example, in the above-described embodiment, the checkout value that the judgement of the pavement behavior of Vehicle Driving Cycle can be arranged on the various sensors on vehicle according to accelerator open degree sensor 72, vehicle speed sensor 73, vehicle-wheel speed sensor 75, acceleration-deceleration sensor 76 etc. judges.But, in the device for control of automatic stopping starting of internal-combustion engine of the present invention, as the data of the judgement of the pavement behavior for carrying out Vehicle Driving Cycle, except the data based on detecting by the various sensor devices that are arranged on vehicle as described above judge, can also be configured to: for example, in the case of vehicle be provided with can with the communication terminal of PERCOM peripheral communication, according to the information that comprises running environment receiving by this communication ends end (for example, as the car inter-vehicle communication information of the information by obtaining with other vehicle communications, as by and be arranged on communication information etc. between the bus that the first-class instrument of road or sensor class communicate the information obtaining), judge the situation on the road surface that vehicle is current travelled.
Claims (7)
1. the device for control of automatic stopping starting of an internal-combustion engine, the rotating force that this device for control of automatic stopping starting is used in the output shaft that makes internal-combustion engine is delivered on the vehicle of driving wheel, in the case of the internal-combustion engine stop condition of regulation is set up, carry out described internal-combustion engine automatically stop process, in the case of the restarting condition of regulation is set up, carry out the restarting processing of described internal-combustion engine
This device for control of automatic stopping starting is characterised in that to have:
Control unit, its for control described internal-combustion engine automatically stop process and restarting processing; And
Pavement behavior judging unit, it judges the situation on the road surface that vehicle travels,
As described control unit performed to described internal-combustion engine automatically stop relevant control mode, comprising:
Automatic suspension of licence pattern in travelling, under this pattern, automatically stopping of travelling of the vehicle described internal-combustion engine of middle license; With
In travelling, automatically stop disapproving pattern, under this pattern, in the travelling of vehicle, disapprove automatically stopping of described internal-combustion engine and permit automatically stopping of described internal-combustion engine during only at vehicle stop,
Control as follows:
In the judgement of the performed pavement behavior of described pavement behavior judging unit, the situation that is judged as this road surface be low coefficient of friction road or ill-roaded during, by to described internal-combustion engine automatically stop relevant control mode from described travelling automatically suspension of licence mode altering in travelling described in being, automatically stop disapproving pattern, and
Return to common road surface from described low coefficient of friction road or described poor road in the situation that is judged as described road surface, make to described internal-combustion engine automatically stop relevant control mode from described travelling, automatically stop the pattern that disapproves travel described in turning back in suspension of licence pattern automatically.
2. the device for control of automatic stopping starting of internal-combustion engine according to claim 1, is characterized in that,
Have vehicle-wheel speed sensor, this vehicle-wheel speed sensor detects the rotational speed of each wheel that described vehicle has,
Described pavement behavior judging unit
According to the checkout value of described vehicle-wheel speed sensor, detect in the time that described vehicle accelerates described in the slippery going state of driving wheel in idling conditions or during at described vehicle deceleration described in the locking travelling state of driving wheel in rotation halted state,
In the situation that detecting that described slippery going state or described locking travelling state continued for the 1st time, the situation that is judged as described road surface is described low coefficient of friction road,
The in the situation that of described slippery going state or described locking travelling state not detected and detect that vehicle was once stopping within the 2nd time, the situation that is judged as described road surface returns to common road surface from described low coefficient of friction road.
3. the device for control of automatic stopping starting of internal-combustion engine according to claim 2, is characterized in that, described the 2nd time is set longlyer than described the 1st time.
4. the device for control of automatic stopping starting of internal-combustion engine according to claim 1, is characterized in that, has:
Detect the speed of a motor vehicle detection unit of the speed of a motor vehicle; And
Detect the accelerator open degree detection unit of accelerator open degree,
Described pavement behavior judging unit is detecting in the scope of the speed of a motor vehicle being detected by described speed of a motor vehicle detection unit in fixing speed, the accelerator open degree being detected by described accelerator open degree detection unit is in the scope of regulation aperture, the variance ratio of the accelerator open degree being detected by described accelerator open degree detection unit is in the scope of regulation variance ratio, and, in the 3rd time, the acceleration-deceleration of the described vehicle of the speed of a motor vehicle based on being detected by described speed of a motor vehicle detection unit exceedes the variation of defined threshold in the situation that stipulated number is above, the situation that is judged as described road surface is described poor road,
In the case of being never judged as the situation on described road surface is that described poor road works the 4th time of passing through and detects that vehicle was once stopping, the situation that is judged as described road surface returns to common road surface from described poor road.
5. the device for control of automatic stopping starting of internal-combustion engine according to claim 4, is characterized in that, described the 4th time is set longlyer than described the 3rd time.
6. according to the device for control of automatic stopping starting of the internal-combustion engine described in any one in claim 1 to 5, it is characterized in that having:
The gear of stepless, it carries out exporting after speed change to the rotation of described internal-combustion engine; And
Output shaft, it is exported by the rotation after described gear speed change to driven wheel side,
The judgement of the performed pavement behavior of described pavement behavior judging unit is that the checkout value obtaining according to the value that detects the rotation based on from described output shaft to described driven wheel side output carries out.
7. the device for control of automatic stopping starting of internal-combustion engine according to claim 6, is characterized in that, the stepless speed changing mechanism that the gear of described stepless is belt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-283736 | 2012-12-26 | ||
| JP2012283736A JP5677406B2 (en) | 2012-12-26 | 2012-12-26 | Automatic stop / start control device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
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| CN103899426A true CN103899426A (en) | 2014-07-02 |
| CN103899426B CN103899426B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310643421.1A Active CN103899426B (en) | 2012-12-26 | 2013-12-03 | Automatic closing/starting control device of internal combustion engine |
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| Country | Link |
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| JP (1) | JP5677406B2 (en) |
| CN (1) | CN103899426B (en) |
Cited By (3)
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| CN106795819A (en) * | 2014-09-02 | 2017-05-31 | 日产自动车株式会社 | The engine stop control device of vehicle |
| CN110053623A (en) * | 2018-01-15 | 2019-07-26 | 本田技研工业株式会社 | Controlling device for vehicle running |
| CN111051169A (en) * | 2017-09-07 | 2020-04-21 | 本田技研工业株式会社 | Vehicle, and control device and control method thereof |
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| JP2017017238A (en) | 2015-07-03 | 2017-01-19 | 株式会社ジェイデバイス | Semiconductor device and method for manufacturing the same |
| JP6677152B2 (en) * | 2016-12-22 | 2020-04-08 | 株式会社豊田自動織機 | Pollution degree estimation device |
| AT520988A1 (en) * | 2018-05-09 | 2019-09-15 | Avl List Gmbh | METHOD FOR OPERATING A MOTOR VEHICLE OPERATED BY A COMBUSTION ENGINE |
| JP7218057B2 (en) * | 2019-03-25 | 2023-02-06 | ダイハツ工業株式会社 | Control device for internal combustion engine |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5677406B2 (en) | 2015-02-25 |
| JP2014125982A (en) | 2014-07-07 |
| CN103899426B (en) | 2017-01-11 |
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