CN105752085A - Method and device for obtaining motor vehicle demand torque - Google Patents
Method and device for obtaining motor vehicle demand torque Download PDFInfo
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- CN105752085A CN105752085A CN201410797486.6A CN201410797486A CN105752085A CN 105752085 A CN105752085 A CN 105752085A CN 201410797486 A CN201410797486 A CN 201410797486A CN 105752085 A CN105752085 A CN 105752085A
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- demand torque
- accelerator pedal
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000001133 acceleration Effects 0.000 claims abstract description 51
- 238000005183 dynamical system Methods 0.000 claims description 25
- 230000002159 abnormal effect Effects 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
Abstract
The invention provides a method and device for obtaining motor vehicle demand torque. The method comprises the steps of obtaining vehicle speed signals; judging whether the vehicle speed signals are normal; when the vehicle speed signals are normal, determining demand torque T1, wherein the demand torque T1 is the product of power system output torque T2 and demand torque correction factor beta, and 0<=beta<=1; when the pressing-down acceleration of an accelerator pedal is smaller than or equal to a preset threshold, the demand torque correction factor is 1; and when the pressing-down acceleration of the accelerator pedal is larger than the preset threshold, the demand torque correction factor is reduced along with the increase of the pressing-down acceleration of the accelerator pedal.
Description
Technical field
The present invention relates to signals of vehicles control field, the method and apparatus being specifically related to a kind of analytical engine motor-car demand torque.
Background technology
In the method for existing parsing driver pedal demand torque, the controller of vehicle is usually tabled look-up determine torque demand coefficient according to driver pedal opening amount signal and GES (or motor speed signal), then according to dynamical system peak torque ability, it is determined that the demand torque that driver pedal resolves.
In actual travel process, driver can be potentially encountered emergency, and then needs quick brake pedal to make emergency brake of vehicle, now owing to anthropic factor is likely to result in misoperation accelerator pedal phenomenon, thus may result in vehicle accident.As can be seen here, existing demand torque analytic method cannot distinguish between the artificial maloperation situation of driver, can only determine demand torque according to the aperture of pedal, and therefore existing analytic method exists potential safety hazard.
Summary of the invention
For this, the technical problem to be solved is in that dynamical system is exported moment of torsion makes correction, overcomes the situation being caused vehicle accident by artificial maloperation.
The present invention provides a kind of method obtaining motor vehicles demand torque, including: obtain GES；Judge that whether described GES is normal；When described GES is normal, determine demand torque T1, described demand torque T1 is the product of dynamical system output torque T 2 and demand torque correction factor β, wherein 0≤β≤1, and when gas pedal depression acceleration is less than or equal to predetermined threshold value, described demand torque correction factor is 1, and when described gas pedal depression acceleration is more than predetermined threshold value, described demand torque correction factor increases with described gas pedal depression acceleration and reduces.
Preferably, before described acquisition GES, also include: obtain described accelerator pedal aperture and described accelerator pedal and reach the time of described aperture experience from original state；Judge that whether described accelerator pedal aperture is normal；When described accelerator pedal aperture is normal, gas pedal depression acceleration according to described accelerator pedal aperture and described Time Calculation；Described demand torque correction factor is determined according to described gas pedal depression acceleration.
Preferably, described dynamical system output torque T 2 be the product of the max. output torque Tmax of dynamical system corresponding to the described accelerator pedal aperture pedal parsing coefficient lambda determined with described GES.
Preferably, when described accelerator pedal aperture is that abnormal or described GES is for time abnormal, it is determined that described demand torque T1 is 0.
Correspondingly, the present invention provides a kind of device obtaining motor vehicles demand torque, including: the first acquiring unit, it is used for obtaining GES；Speed judging unit, is used for judging that whether described GES is normal；Torque arithmetic unit, for when described GES is normal, determine demand torque T1, described demand torque T1 is the product of dynamical system output torque T 2 and demand torque correction factor β, wherein 0≤β≤1, and when gas pedal depression acceleration is less than or equal to predetermined threshold value, described demand torque correction factor is 1, when described gas pedal depression acceleration is more than predetermined threshold value, described demand torque correction factor increases with described gas pedal depression acceleration and reduces.
Preferably, described device also includes: second acquisition unit, reaches the time of described aperture experience from original state for obtaining described accelerator pedal aperture and described accelerator pedal；Aperture judging unit, is used for judging that whether described accelerator pedal aperture is normal；Acceleration calculation unit, is used for when described accelerator pedal aperture is normal, gas pedal depression acceleration according to described accelerator pedal aperture and described Time Calculation；Correction factor determines unit, for determining described demand torque correction factor according to described gas pedal depression acceleration.
Preferably, described dynamical system output torque T 2 be the product of the max. output torque Tmax of dynamical system corresponding to the described accelerator pedal aperture pedal parsing coefficient lambda determined with described GES.
Preferably, described device also includes: abnormal deciding means, for when described accelerator pedal aperture is extremely or described GES is abnormal, it is determined that described demand torque T1 is 0.
Compared with prior art, the method and apparatus of acquisition motor vehicles demand torque provided by the invention can by judging that the pressure acceleration down of accelerator pedal determines demand torque correction factor, and then utilize this coefficient that dynamical system output moment of torsion is modified, it is possible to it is effectively prevented from because artificial misoperation accelerator pedal causes vehicle accident.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, below according to specific embodiments of the invention and in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is the flow chart of the method obtaining motor vehicles demand torque that first embodiment of the invention provides；
Fig. 2 is gas pedal depression acceleration and demand torque correction factor corresponding relation figure；
Fig. 3 is the structural representation of the device obtaining motor vehicles demand torque that second embodiment of the invention provides.
Detailed description of the invention
First embodiment of the invention provides a kind of method obtaining motor vehicles demand torque, and this includes as shown in Figure 1:
S1: obtaining GES, GES represents the travel speed that vehicle is current.
S2: judge that whether described GES is normal, perform S3 when described GES is normal, perform S4 time abnormal.Wherein abnormal being probably of GES is existed what failure and other reasons caused by the controller of vehicle, skilled artisan would appreciate that and judges that the whether normal method of GES has multiple, and existing determination methods is all feasible.
S3: determine demand torque T1, described demand torque T1 is the product of dynamical system output torque T 2 and demand torque correction factor β, wherein 0≤β≤1, and when gas pedal depression acceleration is less than or equal to predetermined threshold value, described demand torque correction factor is 1, when described gas pedal depression acceleration is more than predetermined threshold value, described demand torque correction factor increases with described gas pedal depression acceleration and reduces.
S4: determine that described demand torque T1 is 0.
The acceleration of pressure down of the demand torque correction factor and accelerator pedal meets certain corresponding relation, such as can be as shown in Figure 2, corresponding relation both this is nonlinear in the present embodiment, and wherein x-axis is the pressure acceleration down of accelerator pedal, and y-axis is demand torque correction factor.Such as this threshold value is 50, instantly when pressure acceleration is less than 50, corresponding demand torque correction factor is 1, instantly, when pressure acceleration is more than 50, the demand torque correction factor of the more big correspondence of acceleration is more little, it is possible to be pressure acceleration down in a certain scope corresponding same under press acceleration, it can also be unique corresponding relation, such as, when pressure acceleration is 170 instantly, when corresponding demand torque correction factor is 0.5, pressure acceleration is 200 instantly, corresponding demand torque correction factor is 0.As can be seen here, after calculating, the demand torque T1 finally determined certainly less than or equal to T2.
Due in reality driving procedure, especially for civilian vehicle, the dynamics of driver's step on the accelerator is generally less, so that the movement velocity of accelerator pedal, amplitude are all less；Instantly when pressure acceleration is bigger, it is likely to the maloperation caused by anthropic factor, after such scheme processes, it may be determined that demand torque correction factor levels off to 0, the demand torque thus obtained also will significantly reduce even for 0, and then can reduce the moment of torsion of the actual output of dynamical system.
The method obtaining motor vehicles demand torque provided according to embodiments of the present invention, can by judging that the pressure acceleration down of accelerator pedal determines demand torque correction factor, and then dynamical system output moment of torsion is modified, this method can obtain the kinestate of gas pedal, is effectively prevented from because artificial misoperation accelerator pedal causes vehicle accident.
Preferably, this method may include that before above-mentioned S1
S01: the aperture and the described accelerator pedal that obtain described accelerator pedal reach, from original state, the time that described aperture experiences.Original state can be do not produce any state when pressing down, and pedal moves to certain aperture from original state and necessarily experiences a period of time, i.e. Δ t.
S02: judge that whether described opening amount signal is normal, enter S03 when described aperture is normal, otherwise perform S4.Wherein opening amount signal is abnormal for instance it can be possible that owing to the reason such as controller failure of vehicle causes.Skilled artisan would appreciate that and judge that the whether normal method of pedal opening signal has multiple, existing determination methods is all feasible.
S03: press acceleration under according to described aperture and described Time Calculation.Specifically, first can calculate pedal travel to the velocity variations in the process of this aperture, i.e. the variation delta v of pedal travel speed, pressure acceleration Δ v/ Δ t can be calculated down subsequently.
S04: determine described demand torque correction factor according to the described acceleration of pressure down.
S4: determine that described demand torque T1 is 0.
Above-mentioned preferred version is the concrete mode determining demand torque correction factor, and its computational efficiency is higher, is suitable to apply in vehicle control device.
Preferably, above-mentioned dynamical system output torque T 2 be the product of the max. output torque Tmax of dynamical system corresponding to the described accelerator pedal aperture pedal parsing coefficient lambda determined with described GES, i.e. T2=T3* λ.Specifically, when Tmax is unmodified, the dynamical system output moment of torsion corresponding to accelerator pedal aperture, depends on engine performance for its value of common vehicle, depends on the parameters such as drive motor output for its value of car with mixed energy source.
The method of existing acquisition demand torque, can resolve coefficient according to pedal and go out to revise to Tmax, for instance shown in table 1:
Table 1: pedal resolves coefficient and determines table
When obtaining current vehicle speed with accelerator pedal aperture, it is possible to determine that pedal resolves coefficient lambda according to table 1.For identical pedal aperture, current vehicle speed is more fast, and it is more little that determined pedal resolves coefficient lambda.
Above-mentioned preferred version is determining on the basis of demand torque correction factor, also utilizes pedal to resolve coefficient and further demand torque is modified, and makes the output moment of torsion finally given be more suitable for the actual demand of driver.
Second embodiment of the invention provides a kind of device obtaining motor vehicles demand torque, as it is shown on figure 3, this device includes:
First acquiring unit 31, is used for obtaining GES；
Speed judging unit 32, is used for judging that whether described GES is normal；
Torque arithmetic unit 33, for when described GES is normal, determine demand torque T1, described demand torque T1 is the product of dynamical system output torque T 2 and demand torque correction factor β, wherein 0≤β≤1, and when gas pedal depression acceleration is less than or equal to predetermined threshold value, described demand torque correction factor is 1, when described gas pedal depression acceleration is more than predetermined threshold value, described demand torque correction factor increases with described gas pedal depression acceleration and reduces.
The device obtaining motor vehicles demand torque provided according to embodiments of the present invention, can by judging that the pressure acceleration down of accelerator pedal determines demand torque correction factor, and then dynamical system output moment of torsion is modified, this method can obtain the kinestate of gas pedal, is effectively prevented from because artificial misoperation accelerator pedal causes vehicle accident.
Preferably, described device also includes:
Second acquisition unit 34, reaches the time of described aperture experience for obtaining described accelerator pedal aperture and described accelerator pedal from original state；
Aperture judging unit 35, is used for judging that whether described accelerator pedal aperture is normal；
Acceleration calculation unit 36, is used for when described accelerator pedal aperture is normal, gas pedal depression acceleration according to described accelerator pedal aperture and described Time Calculation；
Correction factor determines unit 37, for determining described demand torque correction factor according to described gas pedal depression acceleration.
Above-mentioned preferred version provides the concrete mode determining demand torque correction factor, and its computational efficiency is higher, is suitable to apply in vehicle control device.
Preferably, described dynamical system output torque T 2 be the product of the max. output torque Tmax of dynamical system corresponding to the described accelerator pedal aperture pedal parsing coefficient lambda determined with described GES.
Above-mentioned preferred version is determining on the basis of demand torque correction factor, also utilizes pedal to resolve coefficient and further demand torque is modified, and makes the output moment of torsion finally given be more suitable for the actual demand of driver.
Preferably, described device also includes:
Abnormal deciding means 38, for when described accelerator pedal aperture is extremely or described GES is abnormal, it is determined that described demand torque T1 is 0.
Obviously, above-described embodiment is only for clearly demonstrating example, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the apparent change thus extended out or variation are still among the protection domain of the invention.
Claims (8)
1. the method obtaining motor vehicles demand torque, it is characterised in that including:
Obtain GES；
Judge that whether described GES is normal；
When described GES is normal, determine demand torque T1, described demand torque T1 is the product of dynamical system output torque T 2 and demand torque correction factor β, wherein 0≤β≤1, and when gas pedal depression acceleration is less than or equal to predetermined threshold value, described demand torque correction factor is 1, and when described gas pedal depression acceleration is more than predetermined threshold value, described demand torque correction factor increases with described gas pedal depression acceleration and reduces.
2. method according to claim 1, it is characterised in that before described acquisition GES, also include:
Obtain described accelerator pedal aperture and described accelerator pedal and reach the time of described aperture experience from original state；
Judge that whether described accelerator pedal aperture is normal；
When described accelerator pedal aperture is normal, gas pedal depression acceleration according to described accelerator pedal aperture and described Time Calculation；
Described demand torque correction factor is determined according to described gas pedal depression acceleration.
3. method according to claim 1 and 2, it is characterised in that described dynamical system output torque T 2 be the product of the max. output torque Tmax of dynamical system corresponding to the described accelerator pedal aperture pedal parsing coefficient lambda determined with described GES.
4. method according to claim 2, it is characterised in that when described accelerator pedal aperture is that abnormal or described GES is for time abnormal, it is determined that described demand torque T1 is 0.
5. the device obtaining motor vehicles demand torque, it is characterised in that including:
First acquiring unit, is used for obtaining GES；
Speed judging unit, is used for judging that whether described GES is normal；
Torque arithmetic unit, for when described GES is normal, determine demand torque T1, described demand torque T1 is the product of dynamical system output torque T 2 and demand torque correction factor β, wherein 0≤β≤1, and when gas pedal depression acceleration is less than or equal to predetermined threshold value, described demand torque correction factor is 1, when described gas pedal depression acceleration is more than predetermined threshold value, described demand torque correction factor increases with described gas pedal depression acceleration and reduces.
6. device according to claim 6, it is characterised in that described device also includes:
Second acquisition unit, reaches the time of described aperture experience for obtaining described accelerator pedal aperture and described accelerator pedal from original state；
Aperture judging unit, is used for judging that whether described accelerator pedal aperture is normal；
Acceleration calculation unit, is used for when described accelerator pedal aperture is normal, gas pedal depression acceleration according to described accelerator pedal aperture and described Time Calculation；
Correction factor determines unit, for determining described demand torque correction factor according to described gas pedal depression acceleration.
7. the device according to claim 5 or 6, it is characterised in that described dynamical system output torque T 2 be the product of the max. output torque Tmax of dynamical system corresponding to the described accelerator pedal aperture pedal parsing coefficient lambda determined with described GES.
8. device according to claim 5, it is characterised in that described device also includes:
Abnormal deciding means, for when described accelerator pedal aperture is extremely or described GES is abnormal, it is determined that described demand torque T1 is 0.
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| CN201410797486.6A CN105752085B (en) | 2014-12-18 | 2014-12-18 | A kind of method and apparatus obtaining motor vehicle demand torque |
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| CN201410797486.6A CN105752085B (en) | 2014-12-18 | 2014-12-18 | A kind of method and apparatus obtaining motor vehicle demand torque |
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| CN105752085B CN105752085B (en) | 2018-08-07 |
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Cited By (9)
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| CN106347125A (en) * | 2016-11-23 | 2017-01-25 | 潍柴动力股份有限公司 | Method and system for filtering signal of opening degree of accelerator pedal |
| CN107458267A (en) * | 2017-07-25 | 2017-12-12 | 北京新能源汽车股份有限公司 | A kind of torque calibration method, device and equipment |
| CN108639063A (en) * | 2017-03-15 | 2018-10-12 | 上海汽车集团股份有限公司 | Hybrid vehicle power loses diagnostic method and device |
| CN110281782A (en) * | 2019-07-09 | 2019-09-27 | 珠海格力电器股份有限公司 | Vehicle output power determines method and apparatus |
| CN110375994A (en) * | 2019-07-25 | 2019-10-25 | 北京智行者科技有限公司 | Drive brake parameters automatic calibration method and device |
| CN111114526A (en) * | 2019-12-18 | 2020-05-08 | 北斗航天汽车（北京）有限公司 | Driving control method, system and device of electric automobile |
| CN111204228A (en) * | 2020-01-20 | 2020-05-29 | 恒大新能源汽车科技(广东)有限公司 | Electric vehicle torque control method and electronic equipment |
| CN112389196A (en) * | 2019-08-19 | 2021-02-23 | 北京新能源汽车股份有限公司 | Pedal signal correction method and device and automobile |
| CN114076046A (en) * | 2020-08-14 | 2022-02-22 | 上海汽车集团股份有限公司 | Engine torque control method and system and automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106347125A (en) * | 2016-11-23 | 2017-01-25 | 潍柴动力股份有限公司 | Method and system for filtering signal of opening degree of accelerator pedal |
| CN108639063B (en) * | 2017-03-15 | 2020-05-26 | 上海汽车集团股份有限公司 | Hybrid vehicle power loss diagnosis method and device |
| CN108639063A (en) * | 2017-03-15 | 2018-10-12 | 上海汽车集团股份有限公司 | Hybrid vehicle power loses diagnostic method and device |
| CN107458267A (en) * | 2017-07-25 | 2017-12-12 | 北京新能源汽车股份有限公司 | A kind of torque calibration method, device and equipment |
| CN107458267B (en) * | 2017-07-25 | 2019-07-09 | 北京新能源汽车股份有限公司 | A kind of torque calibration method, device and equipment |
| CN110281782A (en) * | 2019-07-09 | 2019-09-27 | 珠海格力电器股份有限公司 | Vehicle output power determines method and apparatus |
| CN110375994A (en) * | 2019-07-25 | 2019-10-25 | 北京智行者科技有限公司 | Drive brake parameters automatic calibration method and device |
| CN112389196A (en) * | 2019-08-19 | 2021-02-23 | 北京新能源汽车股份有限公司 | Pedal signal correction method and device and automobile |
| CN112389196B (en) * | 2019-08-19 | 2022-03-01 | 北京新能源汽车股份有限公司 | Pedal signal correction method and device and automobile |
| CN111114526A (en) * | 2019-12-18 | 2020-05-08 | 北斗航天汽车（北京）有限公司 | Driving control method, system and device of electric automobile |
| CN111114526B (en) * | 2019-12-18 | 2021-06-08 | 北斗航天汽车（北京）有限公司 | Driving control method, system and device of electric automobile |
| CN111204228A (en) * | 2020-01-20 | 2020-05-29 | 恒大新能源汽车科技(广东)有限公司 | Electric vehicle torque control method and electronic equipment |
| CN111204228B (en) * | 2020-01-20 | 2022-01-18 | 恒大恒驰新能源汽车科技(广东)有限公司 | Electric vehicle torque control method and electronic equipment |
| CN114076046A (en) * | 2020-08-14 | 2022-02-22 | 上海汽车集团股份有限公司 | Engine torque control method and system and automobile |
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