CN100404333C - Braking force control method for automotive vehicle and braking force control apparatus therefore - Google Patents
Braking force control method for automotive vehicle and braking force control apparatus therefore Download PDFInfo
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- CN100404333C CN100404333C CNB2005101320671A CN200510132067A CN100404333C CN 100404333 C CN100404333 C CN 100404333C CN B2005101320671 A CNB2005101320671 A CN B2005101320671A CN 200510132067 A CN200510132067 A CN 200510132067A CN 100404333 C CN100404333 C CN 100404333C
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Abstract
The invention discloses a braking force control method and a braking force control device thereof for motor vehicles. In the braking force control method for an automotive vehicle and braking force control apparatus therefor, contribution degrees of both of a stroke quantity of a brake input device and a master cylinder pressure developed in a master cylinder are set in accordance with at least one of the stroke quantity of the brake input device and the master cylinder pressure and the contribution degree of the master cylinder pressure on a calculation of a target braking force is set to become larger when an abrupt brake operation by a vehicle driver is detected (a control flag F is set to ''1'') than the contribution degree of the master cylinder pressure when no abrupt brake operation by the vehicle driver is detected (control flag F is reset to ''0'').
Description
Technical field
The present invention relates to motor vehicle brake force control method and motor vehicle brake force control device, wherein the brake operating according to motor vehicle operator comes control brake power, just carries out so-called brake-by-wire (brake-by-wire).
Background technology
The first communique No. of disclosed Japanese patent application on November 2nd, 1999 puts down into 11-301434 and for example understands the previous motor vehicle brake force control device that proposes.In the gradual braking device of the previous proposition that in the first communique of above-mentioned Japanese patent application, discloses, according to the stroke calculating target braking force of master cylinder pressure and brake pedal, and according to this target braking force controlling machine motor vehicle braking force.At this, revise the contribution degree of master cylinder pressure and the contribution degree of pedal stroke according in master cylinder pressure and the pedal stroke at least one.Particularly, in the starting stage of push down on the pedal, make the contribution degree of pedal stroke greater than the contribution degree of master cylinder pressure.This is because there is so general trend: promptly, mainly manage to adjust pedal stroke in the low deceleration/decel zone motor vehicle operator that the deceleration/decel of hope is little, and mainly manage to adjust pedal pressing force in the big high deceleration/decel zone motor vehicle operator of the deceleration/decel of hope.
Summary of the invention
Implementing in order to generate for the brake operating of motor vehicle operator suitable pedal stroke and pedal reaction force, to provide a kind of like this stroke simulator under the situation of brake-by-wire: it is according to the hydraulic pressure that produces in the master cylinder and elastic shrinkage.Mainly the runner that is communicated with between master cylinder and stroke simulator provides discharge orifice for braking liquid, and described discharge orifice makes braking liquid flow to the stroke simulator from master cylinder.Therefore, when motor vehicle operator is wished big deceleration/decel and when stepping on brake pedal more suddenly,, limited the flow velocity that flows to the braking liquid of stroke simulator from master cylinder more in starting stage of push down on the pedal suddenly.Master cylinder pressure when therefore, master cylinder pressure becomes and steps on brake pedal gradually greater than motor vehicle operator.In addition, by the flow velocity of restriction braking liquid, the intention that the stroke of brake pedal can camera motor vehicle chaufeur is carried out like that.
Yet, in the gradual braking device of the previous proposition that in the first communique of above-mentioned Japanese patent application, discloses,, calculate target braking force more greatly by the pedal stroke contribution degree is set in the pedal stroke starting stage.Therefore, even make master cylinder pressure become big when motor vehicle operator is stepped on brake pedal suddenly, master cylinder pressure is also little to the contribution degree that desired deceleration increases.That is to say, in the starting stage of push down on the pedal, even motor vehicle operator is wished the big retarding degree and step on brake pedal suddenly that pedal stroke can not be increased to the degree that motor vehicle operator is wished yet.So, be difficult to say that target braking force has accurately reflected the intention of motor vehicle operator.
The problems referred to above have been known, the purpose of this invention is to provide a kind of like this braking force control method and gradual braking device that is used for power actuated vehicle: even in the starting stage of brake operating, it also can reflect the intention of motor vehicle operator to target braking force exactly.
To achieve these goals, according to an aspect of the present invention, provide a kind of like this motor vehicle brake force control method, comprising: the braking input media is set, and described braking input media can be by the motor vehicle operator manual operation; Master cylinder is set, and described master cylinder is configured to according to motor vehicle operator the operation of braking input media be produced master cylinder pressure; According in the master cylinder pressure that produces in braking path increment of input media and the master cylinder at least one, set the path increment contribution degree and the master cylinder pressure contribution degree of braking input media; Come the target braking force of computing machine motor vehicle according to the contribution degree of path increment and the contribution degree of master cylinder pressure; And according to the braking force of the target braking force controlling machine motor vehicle that calculates, the master cylinder pressure contribution degree when the master cylinder pressure contribution degree that is used to calculate target braking force during with the unexpected brake operating that detects motor vehicle operator is set at greater than the unexpected brake operating that does not detect motor vehicle operator.
To achieve these goals, according to a further aspect in the invention, provide a kind of like this motor vehicle brake force control device, comprising: the braking input media, it can be by the motor vehicle operator manual operation; Master cylinder, it is according to the operation generation master cylinder pressure of motor vehicle operator to the braking input media; The contribution degree setting section, it is according in the master cylinder pressure that produces in braking path increment of input media and the master cylinder at least one, sets the contribution degree of path increment of braking input media and the contribution degree of master cylinder pressure; The target braking force calculating section, it is according to the target braking force of the contribution degree computing machine motor vehicle of the contribution degree of path increment of braking input media and master cylinder pressure; And brake-power control part, it is according to the braking force of the target braking force controlling machine motor vehicle that calculates, the master cylinder pressure contribution degree when this contribution degree setting section is used to calculate target braking force in the time of will detecting the unexpected brake operating of motor vehicle operator master cylinder pressure contribution degree is set at greater than the unexpected brake operating that does not detect motor vehicle operator.Note, it is unexpected that brake operating be defined as such brake operating: promptly, motor vehicle operator provides with respect to big value of preset value (for example 0.3G or bigger) the operating speed or the operation acceleration/accel of the brake operating of braking input media (being brake pedal), and the described value of setting in advance is corresponding with the brake operating in the cruising process of street of power actuated vehicle.
General introduction of the present invention needn't be described all features, and the present invention also can be the recombinant of described these features.
Description of drawings
Fig. 1 is the summary construction diagram of automobile braking system.
Fig. 2 is the diagram of circuit of the brake-power control program carried out in first preferred embodiment of explanation according to motor vehicle brake force control device of the present invention.
Fig. 3 is the performance diagram that expression is used for calculating according to path increment Ss the control mapping of desired deceleration Gs.
Fig. 4 is the performance diagram that expression is used for calculating according to master cylinder pressure Pm the control mapping of another desired deceleration Gp.
Fig. 5 is the performance diagram that expression is used to calculate the control mapping of benchmark master cylinder pressure Pms.
Fig. 6 A and 6B are the performance diagram of the characteristic of expression stroke simulator on the whole.
Fig. 7 A, 7B and 7C are the sequential chart of explanation comparative example with respect to the problem of first embodiment of motor vehicle brake force control device on the whole.
Fig. 8 is the block diagram of the computing of expression ultimate aim deceleration/decel Gt.
Fig. 9 A, 9B are to compare to the sequential chart of 7C with Fig. 7 A with 9C on the whole, and the sequential chart according to the advantage of first embodiment of motor vehicle brake force control device of the present invention is described.
Figure 10 is the diagram of circuit of another example of the motor vehicle brake power control program carried out in the optional mode of first embodiment of motor vehicle brake force control device according to the present invention of explanation.
Figure 11 is the diagram of circuit of explanation brake-power control program of execution in second preferred embodiment (when accelerator brakes to OFF for opening (ON) or accelerator for cutting out (OFF)) of motor vehicle brake force control device according to the present invention.
Figure 12 be continue Figure 11 diagram of circuit another diagram of circuit, the brake-power control program of having represented in second preferred embodiment of motor vehicle brake force control device according to the present invention, to carry out (when braking during) for ON.
Figure 13 is expression as the performance diagram of control mapping that is used to calculate contribution degree α of the optional mode of second embodiment.
The specific embodiment
Hereinafter illustrate so that understand the present invention better with reference to the accompanying drawings.
Fig. 1 has represented the summary construction diagram of brake system.Master cylinder 2 is input to motor vehicle operator that brake pedal 1 (braking input media (equipment)) is gone up and the pedal that applies is depressed power and changed hydraulic pressure into, this master cylinder have with the wheel hydraulic actuating cylinder 3RL of left back and right rear wheel, master that 3RR is communicated with and with the wheel hydraulic actuating cylinder 3FL of left front and right front wheel, the secondary side that 3FR is communicated with.In this case, in this brake system, adopt front and back wheel (wheel) by-passing type system, in this front and back wheel piece-rate system, brake system has been divided into front vehicle wheel and rear wheel.Certainly, also can adopt front and back wheel diagonal angle by-passing type system in this brake system, it is divided into left front brake system and right rear wheel hydraulic actuating cylinder and right front and left back wheel hydraulic actuating cylinder.
Each wheel hydraulic actuating cylinder 3FL is installed to 3RR in plate disc brake, in this plate disc brake, clamp disk rotor by slipper under pressure and produce braking force, each wheel hydraulic actuating cylinder 3FL perhaps is installed to 3RR in drum brake mechanism, in this drum brake mechanism, by producing braking force on the interior perimeter surface that under pressure brake shoe brake cheek is pressed in brake wheel.Hydraulic efficiency pressure system at master comprises: gate valve 4r, and it can close the runner between master cylinder 2 and wheel hydraulic actuating cylinder 3RL, the 3RR; Admission valve 5RL (perhaps 5RR), the runner between its energy closing gate valve 4r and the wheel hydraulic actuating cylinder 3RL (perhaps 3RR); Outlet valve 6RL (or 6RR), it can open the runner between the fluid reservoir 2a of the runner that is communicated with between admission valve 5RL (perhaps 5RR) and the wheel hydraulic actuating cylinder 3RL (3RR) and master cylinder 2; And pump 7r, its suction side is communicated with between outlet valve 6RL (6RR) and fluid reservoir 2a, and it is discharged side and is communicated with between gate valve 4r and admission valve 5RL (or 5RR).
Notice that gate valve 4r, admission valve 5RL, 5RR and outlet valve 6RL, 6RR are bilateral-on-off switch spring offset electromagnetic control valve separately.Each gate valve 4r and admission valve 5RL, 5RR open runner when being in normal position under the non-excited state.Outlet valve 6RL (or 5RR) closes runner when being in normal position under the non-excited state.Be also noted that, because each valve all can open or close this runner, so when each gate valve 4r and admission valve 5RL (or 5RR) are in offset position under excited state, can open runner, and outlet valve 6RL, 6RR can close runner when being in offset position under excited state.
In addition, pump 7r is made of the displacement pump such as gear type pump, piston pump etc., and it can be guaranteed the discharge capacity of substantial constant and have nothing to do with load pressure.In said structure, when admission valve 5RL (or 5RR) and outlet valve 6RL (or 6RR) were in the normal position of non-excited state, gate valve 4r was subjected to excitation and closes, simultaneously driving pump 7r.Therefore, pump 7r sucks the braking liquid among the fluid reservoir 2a, and the discharge pressure of pump 7r can make the hydraulic pressure of wheel hydraulic actuating cylinder 3RL (or 3RR) increase.
When outlet valve 6RL (or 6RR) is in normal position under the non-excited state, gate valve 4r and admission valve 5RL (or 5RR) are subjected to excitation to close corresponding runner, be closed from wheel hydraulic actuating cylinder 3RL (or 3RR) to fluid reservoir 2a with to each runner of pump 7r, thereby can keep hydraulic pressure among the wheel hydraulic actuating cylinder 3RL (or 3RR).In addition, outlet valve 6RL (or 6RR) is subjected to excitation opening runner, and gate valve 4r and admission valve 5RL (or 5RR) are subjected to excitation and are closed respectively.Therefore, the hydraulic pressure of wheel hydraulic actuating cylinder 3RL (or 3RR) can be open to fluid reservoir 2a, thereby reduce hydraulic pressure.
In addition, when gate valve 4r, admission valve 5RL (or 5RR) and outlet valve 6RL (or 6RR) are set as the normal position that is under the non-excited state all, will be from the hydraulic pressure transfer of master cylinder 2 to wheel hydraulic actuating cylinder 3RL (or 3RR), thus common braking is provided.Note, in the hydraulic efficiency pressure system of secondary side, identical gate valve 4f, admission valve 5FL (or 5FR), outlet valve 6FL, 6FR and pump 7f have been installed.Because the operation of each valve is identical with master, so just omitted its detailed description at this.
Controller 9 drive controlling gate valve 4f, 4r, admission valve 5FL are to 5RR, outlet valve 6FL to 6RR with pump 7f, 7r.In common, this controller 9 is carried out brake-power control program shown in Figure 2, thereby according to gate valve 4f, the detected master cylinder pressure Pm of stroke sensor 10 (path increment test section (device)) detected pedal stroke amount Ss and pressure sensor 11 (pressure detection part (device)) carried out brake-by-wire (brake-power control) when 4r closed, when the fail-safe that the failure and other reasons owing to pump 7r causes, open gate valve 4f, 4r, thereby will from the hydraulic pressure transfer of master cylinder 2 to wheel hydraulic actuating cylinder 3FL in 3RR, so that common braking to be provided.
Then, will be according to flow chart description shown in Figure 2 by the brake-power control program in first preferred embodiment of controller 9 execution.This brake-power control program is as being performed every the timing interrupt handling of the schedule time (for example, 10 milliseconds).As shown in Figure 2, at first step S1, controller 9 reads path increment Ss and master cylinder pressure Pm.At step S2 subsequently, controller 9 calculates desired deceleration Gs with reference to the mapping of the control among Fig. 3 according to path increment Ss.As shown in Figure 3, this control mapping is set by this way: promptly, transverse axis is path increment Ss, the longitudinal axis is desired deceleration Gs, when path increment Ss from zero (0) when beginning to increase, desired deceleration Gs begins to increase from zero (0), and along with path increment Ss becomes big, it is big that the increment rate of desired deceleration Gs also becomes.
At step S3 subsequently, controller 9 shines upon with reference to control shown in Figure 4, and calculates desired deceleration Gp according to master cylinder pressure Pm.As shown in Figure 4, set this control mapping by this way: promptly, transverse axis is represented master cylinder pressure Pm, and the longitudinal axis is represented desired deceleration Gp, when master cylinder pressure Pm when 0 increases, the proportional increase of desired deceleration Gp.At step S4 subsequently, controller 9 shines upon with reference to control shown in Figure 5, and calculates benchmark master cylinder pressure Pms according to path increment Ss.As shown in Figure 5, set this control mapping by this way: promptly, transverse axis is represented path increment Ss, and the longitudinal axis is represented benchmark master cylinder pressure Pms, and along with path increment Ss becomes big, the increment rate of benchmark master cylinder pressure Pms also becomes big.
At step S5 subsequently, controller 9 judges whether the deviation (Pm-Pms) between master cylinder pressure Pm and the benchmark master cylinder pressure Pms is equal to or greater than predetermined value A1.The runner 12 that is communicated with between master cylinder 2 and the stroke simulator 8 is mainly the braking liquid that flows to stroke simulator 8 from master cylinder 2 discharge orifice is provided.Therefore, when motor vehicle operator is wished big deceleration/decel and is stepped on brake pedal 1 suddenly, in the starting stage that brake pedal is operated, owing to the flow passage resistance force of waterproof of runner 12 makes the flow velocity that flows to the braking liquid of stroke simulator 8 from master cylinder 2 be restricted.Therefore, corresponding the becoming of master cylinder pressure Pm stepped on master cylinder pressure under the situation of brake pedal 1 gradually greater than motor vehicle operator.
Therefore, if the judged result of step S5 shows (Pm-Pms)＜A1, controller 9 determines that the flow passage resistance force of waterproof of runners 12 does not increase so, and chaufeur do not step on brake pedal (not being unexpected brake operating) suddenly, and program forwards step S6 to.At step S6, control mark F is reset to " 0 ".On the other hand, if be (Pm-Pms) 〉=A1 in the judged result of step S5, then controller 9 determines that the flow passage resistance force of waterproof of runners 12 increases, and judges that chaufeur may carry out unexpected brake operating, and program forwards step S7 to.
At step S7, the path increment Ss that controller 9 is judged from current sampling
(n)Path increment Ss before the sampling time of (n=natural number)
(n-1) |Rate of change (Ss
(n)-Ss
(n-1)) whether be equal to or greater than predetermined value B.If the judged result at step S7 shows (Ss
(n)-Ss
(n-1)) 〉=B, then controller 9 judges that the pace of change of path increment Ss is equal to or greater than predetermined value, and judges that motor vehicle operator may carry out unexpected brake operating, program forwards step S8 to.At step S8, controller 9 is made as " 1 " with control mark F.On the other hand, if show (Ss in the judged result of step S7
(n)-Ss
(n-1))＜B, then controller 9 judge path increment Ss pace of change less than predetermined value B, and judge and exist motor vehicle operator not carry out the possibility of unexpected brake operating that program forwards step S9 to.
At step S9, controller 9 judges whether the deviation (Pm-Pms) between master cylinder pressure Pm and the benchmark master cylinder pressure Pms is equal to or greater than another predetermined value A2.Notice that predetermined value A2 is greater than previously described predetermined value A1.If the judged result of step S9 shows (Pm-Pms)＜A2, controller 9 is judged chaufeur to the unexpected operation of brake pedal 1 execution so, and program forwards step S6 to.If the judged result of step S9 shows (Pm-Pms) 〉=A2, then controller 9 judgement motor vehicle operator have been carried out unexpected brake operating, and program forwards step S8 to.
Step S10 after step S8 or S6, controller 9 be with reference to the mappings shown in the diagram of circuit of Fig. 2, according to the state computation path increment Ss of master cylinder pressure Pm and control mark F and master cylinder pressure Pm for the contribution degree of calculating ultimate aim deceleration/decel Gt.Set this control mapping by this way: promptly, transverse axis is represented master cylinder pressure Pm, the longitudinal axis is represented the contribution degree α of master cylinder pressure Pm, and contribution degree α increases in 0 to 1 scope, and the contribution degree α of the master cylinder pressure Pm when F=1 is greater than the contribution degree α when the F=0.
At step S11, shown in equation (1), controller 9 is according to based on the desired deceleration Gp of master cylinder pressure Pm, based on the desired deceleration Gs of path increment Ss, and the contribution degree α of master cylinder pressure Pm calculates ultimate aim deceleration/decel Gt.
Gt＝α·Gp+(1-α)·Gs ...(1)
According to equation 1, along with the value change of contribution degree α is big, path increment Ss diminishes for the contribution degree of calculating ultimate aim deceleration/decel Gt.At this moment, the contribution degree of master cylinder pressure Pm becomes big.On the contrary, α diminishes along with contribution degree, and path increment Ss becomes big for the contribution degree of calculating ultimate aim deceleration/decel Gt, and the contribution degree of master cylinder pressure Pm is corresponding diminishes.
At step S12 subsequently, controller 9 calculates and obtains the required target braking force of ultimate aim deceleration/decel Gt.At this moment, controller 9 independent calculated example such as front vehicle wheel braking force and rear wheel braking forces, and distribute them ideally.At step S13 subsequently, controller 9 respectively drive controlling gate valve 4f, 4r, admission valve 5FL to 5RR, outlet valve 6FL to 6FR with pump 7f, 7r.
As mentioned above, stroke sensor 10 is corresponding to path increment test section (device), pressure sensor 11 is corresponding to pressure detection part (device), the processing of step S10 is corresponding to contribution degree setting section (device), and the processing from step S5 to S8 is corresponding to unexpected operation detection part (device).
Then, will operation, action and the advantage of first embodiment of gradual braking device be described.Suppose, implement common brake-by-wire now.That is to say that as gate valve 4f, when 4r closes, drive controlling admission valve 5FL is to 5RR, outlet valve 6FL to 6RR and pump 7f, 7r, and implement brake-power control according to the brake operating of motor vehicle operator.
That is to say, controller 9 calculates desired deceleration Gs based on path increment Ss, and based on master cylinder pressure Pm calculating desired deceleration Gp (step S2 and S3), and according to these final deceleration/decel Gs and Gp calculating ultimate aim deceleration/decel Gt (step S11), and according to this ultimate aim deceleration/decel Gt enforcement brake-power control (step S12 and S13).Shown in Fig. 6 A and 6B, the characteristic of stroke simulator 8 is such: promptly, when motor vehicle operator is wished big deceleration/decel, more suddenly step on brake pedal 1, in the starting stage of push down on the pedal, braking liquid flows to stroke simulator 8 from master cylinder 2 flow velocity is owing to the flow passage resistance force of waterproof of runner 12 is restricted.Master cylinder pressure when therefore, master cylinder pressure Pm becomes and steps on brake pedal gradually greater than motor vehicle operator.In addition, this pedal stroke can be not bigger than the pedal stroke of hope.
Therefore, the starting stage of the push down on the pedal when chaufeur is implemented unexpected brake operating, it is big that the contribution degree of path increment Ss becomes, and calculate ultimate aim deceleration/decel Gt.At this moment, the increase of master cylinder pressure Pm diminishes to the contribution degree of the increase of ultimate aim deceleration/decel Gt.Therefore, as Fig. 7 A to shown in the 7C, these accompanying drawings show the operation of comparative example under following situation: promptly, the increase of master cylinder pressure Pm becomes little for the contribution degree of the increase of ultimate aim deceleration/decel Gt, this is as first embodiment same as above, although motor vehicle operator is stepped on brake pedal 1 suddenly and is obtained big deceleration/decel with hope, owing to the flow passage resistance force of waterproof of runner 12 makes that the stroke of brake pedal 1 can not carrying out according to hope like that.In the starting stage of stepping on brake pedal 1, ultimate aim deceleration/decel Gt can not be increased to the degree (with reference to Fig. 7 C) that motor vehicle operator is wished, and can not reflect the intention of chaufeur exactly.
Therefore, when detecting the unexpected brake operating of motor vehicle operator (when control mark F is reset to " 1 "), master cylinder pressure Pm is set at greater than the contribution degree when the unexpected brake operating that does not detect chaufeur (not detecting unexpected brake operating) (when control mark F is reset to " 0 ") for the contribution degree α that calculates final deceleration/decel Gt, and along with the increase of master cylinder pressure Pm, the contribution degree α that is used to calculate the master cylinder pressure Pm of ultimate aim deceleration/decel Gt becomes big.In other words, the contribution degree of master cylinder pressure Pm becomes big (step S10).
Notice that Fig. 8 has represented the computing of the ultimate aim deceleration/decel Gt among first embodiment.Therefore, to shown in the 9C (particularly Fig. 9 C), when master cylinder pressure Pm carries out unexpected brake operating and becomes big owing to motor vehicle operator, improved the increase of ultimate aim deceleration/decel Gt as Fig. 9 A.By reducing the time of advent that arrives the preset deceleration degree, can improve the delay of power actuated vehicle deceleration/decel.Therefore, make ultimate aim deceleration/decel Gt be increased to the value that motor vehicle operator is wished.From the starting stage of brake operating, can reflect the intention of motor vehicle operator exactly, and can represent the effect of braking in the stage early of braking.
In addition, when controller 9 judged that the flow passage resistance force of waterproof of runner 12 increases, this controller 9 can detect the unexpected brake operating that motor vehicle operator occurs, the fluid-pressure transmission path that this runner 12 is master cylinders 2.Therefore, can accurately detect this unexpected brake operating.That is to say that controller 9 calculates benchmark master cylinder pressure Pms according to stroke sensor 10 detected path increment Ss in step S4.If the deviation (Pm-Pms) between benchmark master cylinder pressure Pms and the pressure sensor 11 detected master cylinder pressure Pm is equal to or greater than predetermined value A1 (judged result in step S5 is for being (YES)), then because the judgement that the flow passage resistance force of waterproof of runner 12 increases, controller 9 can be easily and is judged the unexpected brake operating that motor vehicle operator occurs exactly.
And, when gathering way of stroke sensor 10 detected path increment Ss, promptly work as from path increment Ss
(n)The sampling path increment Ss in a sampling period before
(n-1)Variable quantity (Ss
(n)-Ss
(n-1)) when being equal to or greater than predetermined value B (judged result of step S7 is for being), controller 9 judgement motor vehicle operator have been implemented unexpected brake operating.Therefore, can be easily and detect unexpected brake operating exactly.
On the other hand, when controller 9 does not detect unexpected brake operating (when control mark F is reset to " 0 "), the contribution degree of (when control mark F is set to " 1 ") when the contribution degree α that is used to calculate ultimate aim deceleration/decel Gt becomes and detects the unexpected brake operating of motor vehicle operator less than controller 9, and Pm diminishes along with master cylinder pressure, contribution degree α diminishes, and promptly the contribution degree of path increment Ss becomes big (step S10).Like this, can carry out brake-power control according to the general run of thins that motor vehicle operator attempts mainly to adjust pedal stroke in the starting stage of push down on the pedal.
When the fault from the state-detection of carrying out brake-by-wire to for example pump, the fail-safe structure is opened gate valve 4f, 4r, and the hydraulic pressure of master cylinder 2 produces braking force.Notice that in the first above-mentioned embodiment, the processing of step S10 makes contribution degree α change according to the unrestricted continuously stage ground of master cylinder pressure Pm.The invention is not restricted to this.Contribution degree α can in a step-wise fashion change or can change on a stage according to master cylinder pressure Pm.In addition, this contribution degree α according to the variation of master cylinder pressure Pm and non-linear (in the mode of curve shape) change.Yet, the invention is not restricted to this.This contribution degree α can with master cylinder pressure Pm be varied to direct ratio ground linear change.
In addition, with the example of contribution degree α as a minute distribution percentage (allotment ratio).α and (1-α) and can be not constant always.For example, a kind of like this mode: promptly, a contribution degree increases, and another contribution degree does not change, and summation can correspondingly increase.In addition, in first embodiment,, only calculate contribution degree α according to master cylinder pressure Pm at step S10.But the invention is not restricted to this.That is to say, can only calculate this contribution degree α, also can calculate this contribution degree α according to path increment Ss and master cylinder pressure Pm according to path increment Ss.In addition,, the invention is not restricted to this, also can use " or (OR) " condition although by " with (the AND) " condition between the judgment processing of the judgment processing of step S5 and step S7 and detect the unexpected brake operating of motor vehicle operator.
In the first above-mentioned preferred embodiment, if at step S7, from sampling path increment Ss
(n)A sampling period before path increment Ss
(n-1)Rate of change (amount) (Ss
(n)-Ss
(n-1)) be equal to, or greater than predetermined value B, in other words, the pace of change of path increment Ss is equal to or greater than this predetermined value, and then controller 9 is judged the unexpected brake operating that motor vehicle operator occurs.Yet, the invention is not restricted to this.The processing of step S7 can be changed into new step S27 shown in Figure 10.That is to say, if from the master cylinder Pm of current sampling
(n)A sampling period before master cylinder pressure Pm
(n-1)Rate of change (amount) (Pm
(n)-Pm
(n-1)) be equal to or greater than predetermined value C, in other words, if the pace of change of master cylinder pressure Pm is equal to or greater than this predetermined value, then controller 9 can be judged the unexpected brake operating that motor vehicle operator occurs.Therefore, can accurately also easily detect the unexpected brake operating of motor vehicle operator according to the mode identical with brake-power control program shown in Figure 2.
In first embodiment, adopted hydraulic brake system, in this system, hydraulic pressure is transmission medium.Yet, the invention is not restricted to this.Can adopt Pneumatic braking system, in Pneumatic braking system, pressurized air is a transmission medium.In addition, in first embodiment, implemented to utilize the brake-by-wire of hydraulic pressure.Yet, the invention is not restricted to this.Because brake-by-wire can be implemented brake-power control, so, as long as provide such as electrodynamic braking or regeneration motor braking etc. can be automatically controlled the energy, then can adopt braking arbitrarily, in electrodynamic braking, the actuator that drive control motor is handled is clamped disk rotor to utilize slipper under pressure, and under pressure brake shoe brake cheek is pressed on the interior perimeter surface of brake wheel.
Then, based on second preferred embodiment of Figure 11 to 13 description according to gradual braking device of the present invention.The concrete structure of the gradual braking device among second embodiment is identical with first embodiment.In second embodiment, make contribution degree α when the master cylinder pressure Pm contribution degree α that is used to calculate ultimate aim deceleration/decel Gt when the unexpected brake operating of chaufeur appears in controller 9 prediction does not predict the unexpected brake operating that chaufeur occurs greater than controller 9 according to gradual braking device of the present invention.Therefore, in a second embodiment, except the brake-power control program with Fig. 2 changes the brake-power control program shown in Figure 11 and 12 into, carry out and identical processing described in first embodiment.Note, will omit detailed description herein with same reference numerals step shown in Figure 2.
At first, in the step S31 of Figure 11, controller 9 judges whether accelerator is opened (for ON), and promptly whether motor vehicle operator has implemented accelerator operation.If do not implement accelerator operation (denying) at step S31, then program forwards the step S38 that will be described later to.On the other hand, if implemented accelerator operation (accelerator is ON), then program forwards step S32 to.At step S32, controller 9 judges whether the accelerator manipulating amount reduces, and the accelerator releasing operation promptly whether occurs.Do not occur accelerator releasing operation (denying) if controller 9 is judged at step S32, then program forwards step S33 to.On the other hand, occurred accelerator releasing operation (being) if controller 9 is judged at step S32, then program forwards step S34 to.At step S33, controller 9 is reset to " 0 " with control mark F, and program forwards step S37 to.
At step S34, controller 9 is wherein set the threshold value V that accelerator reduces speed according to vehicle velocity V with reference to the mapping of the control shown in the diagram of circuit of Figure 11
RSet this control mapping in such a way: promptly, transverse axis is represented vehicle velocity V, and the longitudinal axis is represented threshold value V
R, then work as vehicle velocity V less than V
1When (for example 20km/h), threshold value V
RRemain on V
R1(for example 500mm/ second) is when vehicle velocity V is increased to V
1With V
2In the time of between (for example 60km/h), threshold value V
RDrop to V
R1With V
R2Between (for example 200mm/ second), and surpass V when vehicle velocity V
2The time, threshold value V
RRemain on V
R2Note V
R1Be to discharge (returning) speed according to the maximum that the structure of accelerator pedal (accelerator) is determined, promptly corresponding to after having discharged the power of depressing of accelerator pedal, utilize retracing spring to make accelerator pedal turn back to the value of the opening speed of releasing position, and it can have the surplus that is approximately-10% such degree.
At next step S35, controller 9 judges that accelerator reduces speed and whether is equal to or greater than threshold value V
RNotice that the rate of change according to from the value in a sampling time before the accelerator manipulating amount comes computation accelerator to reduce speed.Notice that the judged result of step S35 is accelerator deceleration/decel＜V
R(denying), controller 9 judgement motor vehicle operator are not implemented unexpected accelerator releasing operation.Therefore, unexpected brake operating is not subsequently implemented in controller 9 predictions, and program forwards step S33 to.On the other hand, if being accelerator, the judged result of step S35 reduces speed 〉=V
R, then controller 9 judges that the flat-out acceleration device of having implemented chaufeur returns (release) operation, and predicts and implemented unexpected brake operating subsequently that this program forwards step S36 to.
At step S36, controller 9 is set at " 1 " with control mark F, and this program forwards step S37 to.At step S37, controller 9 will be represented the interim setting mark f of the interim set condition of control mark F
FBe set at " 1 ", and this program is returned predetermined main program.On the other hand, at step S38, controller 9 judges whether braking is OFF, promptly whether does not implement brake operating.If implemented brake operating (denying), then program forwards step S51 shown in Figure 12 to, and this will be explained hereinafter.On the other hand, if brake operating (being) do not occur, then this program forwards step S39 to.
At step S39, controller 9 judges whether to set mark f temporarily
FBe set to " 1 ".If judged result is f
F=0, then controller 9 is judged after for example ignition lock being opened, and must not implement accelerator operation, and program turns back to predetermined main program.On the other hand, if judged result is f
F=1, then controller 9 judges that (now) is after having discharged accelerator operation this moment, and this program forwards step S40 to.
At step S40, controller 9 utilize timer T (T=T+1) to from discharge accelerator operation the time be carved into the time in the moment of beginning brake operating and count.At step S41 subsequently, controller 9 will represent to utilize the timer mark f of the counting initial state of timer T
TBe set at " 1 ", utilize the counting initial state of timer T with expression, and this program returned predetermined main program.On the other hand, among the step S51 in Figure 12, controller 9 is judged timer mark f
TWhether be set to " 1 ".If the judged result at step S51 is f
T=0, then controller 9 judges that this brake operating is not the brake operating after discharging accelerator operation, and program forwards the step S59 that will be described later to.On the other hand, if be f in the judged result of step S51
T=1 (being), then controller 9 judges that this brake operating is the brake operating after having discharged accelerator operation, program forwards step S52 to.
At step S52, controller 9 in this control mapping, is set the threshold value Tc of timer T with reference to the mapping of the control shown in the diagram of circuit of Figure 12 according to vehicle velocity V.Set this control mapping according to following such mode: promptly, transverse axis is a vehicle velocity V, and the longitudinal axis is threshold value Tc, when vehicle velocity V is increased to V from zero
2When (for example 60km/h), threshold value Tc is at Tc
1(for example 0.2 second) and Tc
2Increase between (for example 0.5 second), and work as vehicle velocity V above V
2The time, this threshold value Tc remains on Tc
2Note Tc
1Being ordinary people's specularity ground is transformed into required time of brake pedal 1, Tc with pedal from accelerator pedal
2Even the people who is capability of reaction slow (reaction is slow) also can change the required time of pedal.
At step S53 subsequently, controller 9 judges whether the count value of timer T is equal to or greater than threshold value Tc.If the judged result of step S53 is T 〉=Tc (being), then brake operating does not begin after discharging accelerator operation at once.Therefore, unexpected brake operating is not implemented in controller 9 predictions, and program forwards step S54 to.If the judged result of step S53 is T＜Tc, then after discharging accelerator operation, begin brake operating at once, so controller 9 predicts and has implemented unexpected brake operating that program forwards step S55 to.
At step S54, controller 9 is reset to " 0 " with control mark F, and program forwards step S56 to.At step S55, controller 9 is set at " 1 " with control mark F, and program forwards step S56 to.At step S56, timer T is reset to " 0 ".At step S57 subsequently, with timer mark f
TBe reset to " 0 ".At step S58 subsequently, will set mark f temporarily
FBe reset to " 0 ", and program forwards the described step S10 with reference to Fig. 2 to.
On the other hand, at step S59, controller 9 judges whether control mark F is reset to " 0 ".If judged result is F=1 (denying), then controller 9 has been predicted and unexpected brake operating will have been occurred, and this program forwards step S10 to.On the other hand, if the F=0 of step S59, then controller 9 judges that existence will detect the possibility of unexpected brake operating from now on, and this program forwards step S2 to.As mentioned above, the pack processing of step S31 to the processing of S41 and step S51 to S57 is contained in the unexpected operation detection part (device) among Figure 11.
Then, with operation, action and the advantage described according to second preferred embodiment of motor vehicle brake force control device of the present invention.Suppose now, in the accelerator operation process, motor vehicle operator is implemented unexpected accelerator releasing operation (judged result of step S35 is for being), then, unexpected brake operating appears in controller 9 prediction subsequently, and control mark F is set at " 1 " with as interim setting (step S36).Like this, predict the moment that is about to occur unexpected brake operating at controller 9 (in advance), it is big that the contribution degree α of master cylinder pressure Pm becomes.Therefore, owing to be not that actual detected from unexpected brake operating begins response, so can be by improving response characteristic detection time.Therefore, just can guarantee the big retarding degree that chaufeur is wished exactly from the starting stage that brake operating begins.
In addition, before implementing actual brake operating,, can predict unexpected brake operating in the stage of implementing the accelerator releasing operation.Therefore, the response characteristic of second embodiment is good especially.Because whether the minimizing speed according to accelerator operation is equal to or greater than threshold value V
RWhether the judgement of unexpected braking appears.Therefore, can be easily and judge unexpected brake operating exactly.In addition, along with vehicle velocity V becomes faster, accelerator reduces the threshold value V of speed
RBe set to littler value (step S34).The response characteristic of the high-speed range that particularly, can easier raising has a significant impact for the stopping distance tool.Therefore, the unexpected brake operating for high-speed range demonstrates good response characteristic.Owing to just obtaining the big retarding degree that motor vehicle operator is wished, so can make stopping distance short as much as possible since the starting stage.
Then, utilize timer T to from discharge accelerator operation the time be carved into the time length (pedal transfer time) in the moment of beginning brake operating and calculate (step S40).When beginning brake operating timer count value T constantly less than threshold value Tc (judged result of step S53 is a "No"), controller 9 predictions will be implemented unexpected brake operating constantly from this, and control mark F is set at " 1 " (step S55).
In this case, in the moment of having predicted unexpected brake operating, it is big that the contribution degree α of master cylinder pressure Pm correspondingly becomes.Therefore, owing to be not that actual detected from unexpected brake operating begins response, so can be by improving response characteristic detection time.Therefore, the starting stage during from the beginning brake operating, just can obtain the big retarding degree that motor vehicle operator is wished exactly.
In addition, because begin the moment enforcement prediction of brake operating,, can improve reliability so compare with situation about predicting in the stage of accelerator releasing operation from reality.In addition, owing to whether the count value according to timer T judges whether to implement unexpected brake operating less than threshold value Tc.Therefore, can judge this easily and exactly.Moreover along with vehicle velocity V accelerates, the threshold value Tc of timer value T is set to longer (step S52).Particularly, the response characteristic of the high-speed range that has a significant impact for the stopping distance tool of easier raising.Therefore, the unexpected brake operating for high-speed range demonstrates good response characteristic.Since the starting stage, obtain the big retarding degree that motor vehicle operator is wished in such a way, just can make stopping distance short as much as possible.
As mentioned above, under the situation according to the unexpected brake operating of pedal transfer time (timer T) prediction appearance, forecasting reliability is improved compared to the situation of implementing unexpected braking deceleration in the moment that detects unexpected accelerator releasing operation.Therefore, even detect unexpected accelerator releasing operation, the count value of timer T also is equal to or greater than threshold value Tc (judged result of step S53 is for being).The control mark F that at this moment, will preestablish (the interim setting) at step S54 is reset to " 0 ".Therefore, when improving response characteristic, do not reduce forecasting reliability.
Note, in a second embodiment, though detect unexpected accelerator releasing operation according to the minimizing speed of accelerator operation.But the invention is not restricted to this.For example, when the minimizing acceleration/accel (minimizing acceleration/accel) of accelerator operation when being equal to or greater than threshold value, controller 9 also can detect unexpected accelerator releasing operation.In addition, in a second embodiment,, when being equal to or greater than (being longer than) threshold value Tc, the count value of timer T also control mark F is reset to " 0 " even detect unexpected accelerator operation.Yet, the invention is not restricted to this.For example, even timer T is equal to or greater than threshold value Tc, control mark F also remains F=1.Therefore, when calculating contribution degree α, can be with reference to control mapping as shown in figure 13.Set control shown in Figure 13 mapping in such a way: promptly,, contribution degree α is set at from the state of the F=1 state near F=0 along with the count value of timer T elongated (increase).Therefore, when following response characteristic, can not reduce forecasting reliability.
In addition, in a second embodiment, though predict unexpected brake operating according to flat-out acceleration device releasing operation and pedal time (timer value T).But the invention is not restricted to this.For example, can predict unexpected brake operating according to the relativeness between this power actuated vehicle and the power actuated vehicle before this power actuated vehicle of travelling.That is to say, when with the vehicle headway of mmi machine motor vehicle suddenly when vehicle headway is roughly constant state and reduces, perhaps when the vehicle headway with the mmi machine motor vehicle is shorter than the shortest stopping distance, exist motor vehicle operator to implement the possibility of unexpected brake operating.Therefore, even in this case, because control mark F is set to " 1 ", so the contribution degree α that controller 9 also can respond master cylinder pressure Pm becomes big such situation.Other action of the present invention, advantage and field of application are described identical with the situation of above-mentioned first embodiment.
The application is that the application number of submitting in No.2004-370827 and on May 31st, 2005 is the Japanese patent application formerly of No.2005-160474 based on the application number of submitting in Japan on December 22nd, 2004, and the disclosure of these two applications is incorporated this paper into by reference at this.
Although below described the present invention with reference to some embodiment of the present invention, the invention is not restricted to the embodiments described.According to above instruction, those skilled in the art can make amendment and change the foregoing description.Scope of the present invention is limited by following claim.
Claims (19)
1. braking force control method that is used for power actuated vehicle comprises:
The braking input media is set, and described braking input media can be by the motor vehicle operator manual operation;
Master cylinder is set, and described master cylinder is configured to according to the operation generation master cylinder pressure of motor vehicle operator to described braking input media;
According in the master cylinder pressure that produces in the path increment of described braking input media and the described master cylinder at least one, set the contribution degree of path increment of described braking input media and the contribution degree of described master cylinder pressure;
Target braking force according to described path increment contribution degree and described master cylinder pressure contribution degree computing machine motor vehicle; It is characterized in that,
According to the braking force of the described target braking force controlling machine motor vehicle that calculates, the master cylinder pressure contribution degree when the master cylinder pressure contribution degree that is used to calculate described target braking force during with the unexpected brake operating that detects motor vehicle operator is set at greater than the unexpected brake operating that does not detect motor vehicle operator.
2. gradual braking device that is used for power actuated vehicle comprises:
The braking input media, it can be by the motor vehicle operator manual operation;
Master cylinder, it is configured to according to motor vehicle operator the operation of described braking input media be produced master cylinder pressure;
The contribution degree setting section, it is according in the master cylinder pressure that produces in the path increment of described braking input media and the described master cylinder at least one, sets the contribution degree of path increment of described braking input media and the contribution degree of described master cylinder pressure;
The target braking force calculating section, its path increment contribution degree and described master cylinder pressure contribution degree according to described braking input media is come the target braking force of computing machine motor vehicle; It is characterized in that described gradual braking device also comprises:
The brake-power control part, it comes the braking force of controlling machine motor vehicle according to the described target braking force that calculates, the master cylinder pressure contribution degree when described contribution degree setting section is used to calculate described target braking force in the time of will detecting the unexpected brake operating of motor vehicle operator master cylinder pressure contribution degree is set at greater than the unexpected brake operating that does not detect motor vehicle operator.
3. the gradual braking device that is used for power actuated vehicle according to claim 2, wherein,
Described gradual braking device also comprises:
The path increment test section, it detects the path increment of described braking input media;
The pressure detection part, it detects the master cylinder pressure that produces in described master cylinder; And
Unexpected operation detection part, it detects the unexpected brake operating that motor vehicle operator whether occurs, and,
Described target braking force calculating section calculates target braking force according to the contribution degree of the master cylinder pressure that produces in the contribution degree of the path increment of master cylinder pressure that produces in the path increment of described braking input media, the described master cylinder and described braking input media and the described master cylinder.
4. the gradual braking device that is used for power actuated vehicle according to claim 3, wherein,
Described unexpected operation detection partly increases by the flow passage resistance force of waterproof in the fluid pressure transfer path of judging described master cylinder, detects the unexpected brake operating of motor vehicle operator.
5. the gradual braking device that is used for power actuated vehicle according to claim 4, wherein,
Described unexpected operation detection part is divided according to the detected path increment calculating in described path increment test section benchmark master cylinder pressure, and when the deviation between the master cylinder pressure that described benchmark master cylinder pressure and described pressure detecting portion branch detect is equal to or greater than predetermined value, judge that the flow passage resistance force of waterproof in the fluid pressure transfer path of described master cylinder increases.
6. the gradual braking device that is used for power actuated vehicle according to claim 3, wherein,
Described unexpected operation detection part divides the gathering way of master cylinder pressure that detects according to described pressure detecting portion branch to be equal to or greater than predetermined value, detects the unexpected brake operating of motor vehicle operator.
7. the gradual braking device that is used for power actuated vehicle according to claim 3, wherein,
Described unexpected operation detection part branch is equal to or greater than predetermined value according to gathering way of the detected path increment in described path increment test section, detects the unexpected brake operating of motor vehicle operator.
8. the gradual braking device that is used for power actuated vehicle according to claim 3, wherein,
The unexpected brake operating of motor vehicle operator partly appears in described unexpected operation detection by prediction, detect the unexpected brake operating of motor vehicle operator.
9. the gradual braking device that is used for power actuated vehicle according to claim 8, wherein,
Described unexpected operation detection part is when detecting the flat-out acceleration device releasing operation of motor vehicle operator, and the unexpected brake operating of motor vehicle operator appears in prediction.
10. the gradual braking device that is used for power actuated vehicle according to claim 9, wherein,
Described unexpected operation detection part divide according in the acceleration/accel of the speed of accelerator releasing operation and accelerator releasing operation any one or the two be equal to or greater than predetermined threshold, detect the flat-out acceleration device releasing operation of motor vehicle operator.
11. the gradual braking device that is used for power actuated vehicle according to claim 10, wherein,
Along with the speed of a motor vehicle accelerates, described predetermined threshold is set to and diminishes.
12. the gradual braking device that is used for power actuated vehicle according to claim 9, wherein,
When responding described unexpected operation detection part branch, described contribution degree setting section predicts the brake operating that appearance is unexpected according to the flat-out acceleration device releasing operation of motor vehicle operator, and the described master cylinder pressure contribution degree that will be used to calculate described target braking force is set at when bigger, along with discharge from motor vehicle operator accelerator operation the time to be carved into the time length in the moment that the brake operating of motor vehicle operator begins elongated, be used to calculate the more approaching such state of described master cylinder pressure contribution degree of described target braking force: the state of described unexpected operation detection part when the unexpected brake operating of motor vehicle operator appears in prediction.
13. the gradual braking device that is used for power actuated vehicle according to claim 8, wherein,
When the time length in the moment that the brake operating that is carved into motor vehicle operator when motor vehicle operator discharges accelerator operation begins was shorter than predetermined threshold, described unexpected operation detection partly doped the unexpected brake operating of existing motor vehicle operator.
14. the gradual braking device that is used for power actuated vehicle according to claim 13, wherein,
Along with the speed of a motor vehicle accelerates, described predetermined threshold is set to bigger.
15. the gradual braking device that is used for power actuated vehicle according to claim 3, wherein,
Described gradual braking device also comprises:
The first desired deceleration calculating section, it calculates first desired deceleration (Gs) according to the detected path increment in described path increment test section (Ss);
The second desired deceleration calculating section, it calculates second desired deceleration (Gp) according to the master cylinder pressure (Pm) that described pressure detecting portion branch detects; And
Benchmark master cylinder pressure calculating section, it calculates benchmark master cylinder pressure (Pms) according to the detected path increment in described path increment test section (Ss),
Described unexpected operation detection part branch comprises the control mark setting section, described control mark setting section is when detecting the unexpected brake operating of motor vehicle operator, (F) is made as " 1 " with control mark, and when not detecting the unexpected brake operating of motor vehicle operator, (F) is reset to " 0 " with described control mark, and
Described contribution degree setting section is according to the state of described master cylinder pressure (Pm) and described control mark (F), sets the contribution degree (α) of the described master cylinder pressure (Pm) that is used to calculate ultimate aim deceleration/decel (Gt).
16. the gradual braking device that is used for power actuated vehicle according to claim 15, wherein,
Described gradual braking device also comprises ultimate aim deceleration/decel calculating section, described ultimate aim deceleration/decel calculating section calculates described ultimate aim deceleration/decel (Gt) according to the contribution degree (α) of described first desired deceleration (Gs), second desired deceleration (Gp) and described master cylinder pressure.
17. the gradual braking device that is used for power actuated vehicle according to claim 16, wherein,
Described target braking force calculating section calculates target braking force, to obtain ultimate aim deceleration/decel (Gt).
18. the gradual braking device that is used for power actuated vehicle according to claim 15, wherein,
Described contribution degree setting section is set described path increment (Ss) contribution degree and described master cylinder pressure (Pm) contribution degree that is used to calculate ultimate aim deceleration/decel (Gt) in such a way, described mode is: according to the increase of described master cylinder pressure (Pm) and the contribution degree (α) of described master cylinder pressure is increased to 1 from 0, and the described master cylinder pressure contribution degree of the described master cylinder pressure contribution degree (α) when described control mark (F) is set to " 1 " when being reset to " 0 " than described control mark (F) is big.
19. motor vehicle brake force control device according to claim 16, wherein, described ultimate aim deceleration/decel calculating section is calculated as follows ultimate aim deceleration/decel (Gt):
Gt＝α·Gp+(1-α)·Gs。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004370827 | 2004-12-22 | ||
| JP2004370827 | 2004-12-22 | ||
| JP2005160474 | 2005-05-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1792685A CN1792685A (en) | 2006-06-28 |
| CN100404333C true CN100404333C (en) | 2008-07-23 |
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ID=36804392
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101320671A Expired - Fee Related CN100404333C (en) | 2004-12-22 | 2005-12-21 | Braking force control method for automotive vehicle and braking force control apparatus therefore |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015110053A1 (en) * | 2015-06-23 | 2016-12-29 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Braking system for a rail vehicle |
| TWI603870B (en) * | 2016-04-21 | 2017-11-01 | Variable speed brake control system for motorcycle speed control |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0800975A2 (en) * | 1996-04-08 | 1997-10-15 | Denso Corporation | Brake control apparatus for a vehicle |
| CN1167466A (en) * | 1994-11-25 | 1997-12-10 | Itt欧洲自动车股份公司 | Braking system for motor vehicles |
| GB2336413A (en) * | 1998-04-16 | 1999-10-20 | Toyota Motor Co Ltd | Vehicle brake control based upon pedal stoke and master cylinder pressure |
| JP2000177570A (en) * | 1998-12-21 | 2000-06-27 | Toyota Motor Corp | Vehicular braking controller |
| US6192308B1 (en) * | 1998-12-17 | 2001-02-20 | Toyota Jidosha Kabushikii Kaisha | Brake control device of vehicle operable with double checking of driver's positive braking intention |
| US20040222695A1 (en) * | 2003-04-21 | 2004-11-11 | Toyota Jidosha Kabushiki Kaisha | Braking system for vehicle |
-
2005
- 2005-12-21 CN CNB2005101320671A patent/CN100404333C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167466A (en) * | 1994-11-25 | 1997-12-10 | Itt欧洲自动车股份公司 | Braking system for motor vehicles |
| EP0800975A2 (en) * | 1996-04-08 | 1997-10-15 | Denso Corporation | Brake control apparatus for a vehicle |
| GB2336413A (en) * | 1998-04-16 | 1999-10-20 | Toyota Motor Co Ltd | Vehicle brake control based upon pedal stoke and master cylinder pressure |
| US6192308B1 (en) * | 1998-12-17 | 2001-02-20 | Toyota Jidosha Kabushikii Kaisha | Brake control device of vehicle operable with double checking of driver's positive braking intention |
| JP2000177570A (en) * | 1998-12-21 | 2000-06-27 | Toyota Motor Corp | Vehicular braking controller |
| US20040222695A1 (en) * | 2003-04-21 | 2004-11-11 | Toyota Jidosha Kabushiki Kaisha | Braking system for vehicle |
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