CN103342125A - Method for automatically adjusting power control mode of mixed power vehicle - Google Patents
Method for automatically adjusting power control mode of mixed power vehicle Download PDFInfo
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- CN103342125A CN103342125A CN2013103056682A CN201310305668A CN103342125A CN 103342125 A CN103342125 A CN 103342125A CN 2013103056682 A CN2013103056682 A CN 2013103056682A CN 201310305668 A CN201310305668 A CN 201310305668A CN 103342125 A CN103342125 A CN 103342125A
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Abstract
Provided is a method for automatically adjusting a power control mode of a mixed power vehicle. According to the method for automatically adjusting the power control mode of the mixed power vehicle, through the fact that a slope inclined angle in the driving working condition of the vehicle is calculated, accurate judgment of specific driving working condition of a finished vehicle is completed, the purpose of automatic adjustment of the power control mode is achieved, and the optimized running effect of the finished vehicle is realized. Through the automatic adjustment of the power control mode of the finished vehicle in different driving working conditions, the method for automatically adjusting the power control mode of the mixed power vehicle can enable the vehicle to be in the optimized running mode, especially along with the timing adjustment of the power control mode, the advantages of mixed power city buses on energy conservation and emission reduction can be performed, the oil saving rate of the mixed power vehicle can be improved, the economy of the oil consumption can be enhanced, and the operation cost of operators can be reduced. When the vehicle climbs a slope or comes down the slope, the inclined angles are changed, and the braking capability of the finished vehicle can also be improved according to the change needs to be overcome by the vehicle in driving. The method for automatically adjusting the power control mode of the mixed power vehicle is suitable for the automatic adjustment of the power control mode of the mixed power vehicles.
Description
Technical field
The present invention relates to a kind of method of automatic adjustment hybrid vehicle power control pattern, belong to hybrid vehicle power control technical field.
Background technology
The mixed power city bus with respect to more saving than traditional fuel combustion vehicle, has certain effects of energy conservation and environmental protection, thereby extensively is subjected to the favor of market and operator on fuel oil uses because using two kinds or above propulsion source.At present, at home and abroad on the market widely used hybrid vehicle for using traditional fuel oil and electric power as the vehicle of power resources.Because the use of dual power source makes mixed power city bus running state possess unicity unlike traditional fuel vehicle or pure electric vehicle, application principle normally combustion engine, electrical motor combines by control system with power accumulator.If chaufeur need be selected the vehicle power pattern, usually need be by the procedure Selection button on the instrument desk to be operated, this is both time-consuming, in the vehicle operating operation certain limitation is arranged simultaneously; And in case the true property of road conditions forecasting inaccuracy has been set the power control pattern wrong because of chaufeur, the energy-saving and environmental protection advantage that hybrid vehicle has not only can not be given full play to, more likely play the effect of running counter to desire, car load service life is also lost simultaneously in unfavorable car load operation easily.
Summary of the invention
The objective of the invention is, compare pure electric vehicle and the existing advantage of traditional fuel vehicle in order to bring into play the mixed power city bus to greatest extent, promote mixed power city bus fuel saving ratio, improve grade braking, the present invention discloses a kind of method of automatic adjustment hybrid vehicle power control pattern.
Realize that technical scheme of the present invention is, the present invention passes through the accurate measurement to the gradient in the vehicle driving-cycle, and then reaches the purpose that automatic follow-up is adjusted.
Because wheel is directly to contact closely with the road surface in the car load parts, the present invention is by the calculating to gradient inclination angle in the vehicle driving-cycle, utilize the inclination angle to the travel sensitivity response in ramp in the road conditions of vehicle, finish car load to the accurate judgement of concrete driving cycle, and then reach power control pattern self-align purpose, realize car load optimum operation effect.
Three kinds of road conditions that the present invention experiences the vehicle day-to-day operation are divided into descending operation (A), level land operation (B), the operation (C) of going up a slope, respectively three kinds of road conditions being carried out the inclination angle, ramp calculates, along with the difference of the inclination angle number of degrees that calculate, the car load resistance to motion also can change thereupon.
According to conservation of energy theorem, F
t=F
f+ F
w+ F
i+ F
j(be vehicle resistance to motion F
tEqual the rolling resistance F that produces in the vehicle operating process
f, air resistance F
w, grade resistance F
iWith resistance due to acceleration F
jSum);
And F
t=T
Tqi
gi
oη T/r=Gfcos α+C
DAu
a 2/ 21.15+Gsin α+δ md
u/ d
t(1)
In the following formula, T
TqThe mean engine torque, i
gBe transmission ratio, i
oBe the main reduction gear transmitting ratio, η T is driving efficiency, and r is the rolling tire radius, C
DBe aerodynamic drag factor, δ is the automobile correction coefficient of rotating mass, and f is coefficient of rolling resistance, d
u/ d
tBe the acceleration/accel that travels, A is the area of conter of vehicle heading, u
aRefer to that running velocity, the G masterpiece of attaching most importance to firmly equals mg, inclination angle, the α ramp number of degrees.
By (1) Shi Kede:
fcosα+sinα=（T
tqi
gi
oηT/r-C
DAu
a 2/21.15-δmd
u/d
t）/G （2）
Through the trigonometric function conversion:
fcosα+sinα=
(sinαcosθ+cosαsinθ)
=
sin（α+θ）； （3）
(cos θ=1/ wherein
);
By (3) formula and (2) formula, can get:
sin（α+θ）=（T
tqi
gi
oηT/r-C
DAu
a 2/21.15-δmd
u/d
t）/G
（4）
For guaranteeing that vehicle can be accurately according to inclination angle, the ramp adjustment power control pattern of calculating, design engineering personnel can be according to the car load power configuration to the transmission ratio value i in the above-mentioned formula
g, main reduction gear gear ratio value i
o, driving efficiency η T, correction coefficient of rotating mass δ, vehicle mass m, car load area of conter A and tire radius are demarcated.Passenger vehicle coefficient of rolling resistance f is generally fixed value, as long as calculate the numerical value of sin(α+θ) for this reason, can know ramp angles α.
As shown in Figure 1, three kinds of road conditions experiencing of vehicle day-to-day operation mainly contain descending pattern (A), level land operation (B), upward slope pattern (C).According to the definition of above-mentioned formula, in office one travels all can calculate the ramp angles that car load is just experiencing under the speed of a motor vehicle or the acceleration mode easily, and ramp angles result draws like having assigned " preparations " order for car load power operational mode, in order to follow up at any time.It is different that inclination angle, the ramp number of degrees that vehicle calculates under different road conditions have institute, therefore the resistance to motion that stands of car load and be used for overcoming resistance and guarantee that the required car load energy of the normal operation of vehicle changes thereupon, energy changing is ordered about the change of power control pattern, thereby reaches the final purpose of adjusting the power control pattern automatically.
Under (A) operational mode, assisting down of descending inertial force, car load requires the power capacity that is used for anti-resistance can be too not high, and the pure dynamic mode that only needs power battery pack to provide can guarantee the safety and steady operation of vehicle.
When (B) mode state, the resistance that will overcome during vehicle travels has rolling resistance F
f, air resistance F
wWith resistance due to acceleration F
jBy above-mentioned ramp angles formula as can be known: sin(α+θ) numerical value approaches zero, and the ramp inclination alpha number of degrees are close to or are parallel to the ground fully.Be in the steady accelerating action of best power source control operational mode and vehicle for guaranteeing vehicle this moment, and electrical motor performance booster action for driving engine provides the auxiliary energy source, reduces car load to the simple dependence of engine power.
When (C) mode state, ramp angles α constantly changes under car brakeing is accelerated, and car load this moment needed resistance in service has rolling resistance of wheel, air resistance, grade resistance and resistance due to acceleration.Dual the exerting pressure of ramp angles α and resistance to motion shows that car load need have bigger power capacity.The mode of operation of driving engine will be adjusted into the maximum power output mode, namely with full load mode work in order to keep the optimum operation of vehicle this moment.
The invention has the beneficial effects as follows that the present invention can make vehicle be in the optimum operation pattern at any time by the automatic adjustment of car load power control pattern under different driving cycles, use performance to have positive role to promoting car load; The most important thing is, along with the in good time adjustment of power control pattern, can at utmost bring into play the advantage of mixed power city bus aspect energy-saving and emission-reduction, promote the hybrid vehicle fuel saving ratio, strengthen fuel economy, reduce operating cost of operator; The 3rd, go up a slope or descending when operation at vehicle, along with the measurement of degree of tilt to the ramp, the variation of the resistance to motion that will overcome when travelling according to car load, the car load braking potential also can make moderate progress.
The present invention is applicable to the automatic adjustment of hybrid vehicle power control pattern.
Description of drawings
Fig. 1 is three kinds of road conditions scheme drawings that the vehicle day-to-day operation experiences;
Wherein: (A) be the descending operation; (B) be the level land operation; (C) be the operation of going up a slope.
The specific embodiment
The specific embodiment of the invention is as follows:
Formula calculates the travel angle in road conditions ramp of vehicle below the embodiment of the invention utilization:
sin（α+θ）=（T
tqi
gi
oηT/r-C
DAu
a 2/21.15-δmd
u/d
t）/G
In the formula, α is inclination angle, the ramp number of degrees, T
TqThe mean engine torque, i
gBe transmission ratio, i
oBe the main reduction gear transmitting ratio, η T is driving efficiency, and r is the rolling tire radius, C
DBe aerodynamic drag factor, A is the area of conter of vehicle heading, u
aRefer to running velocity, δ is the automobile correction coefficient of rotating mass, vehicle mass m, d
u/ d
tBe the acceleration/accel that travels, the G masterpiece of attaching most importance to firmly equals mg, cos θ=1/
Calculate the inclination angle number of degrees, finish car load to the accurate judgement of concrete driving cycle, and then reach power control pattern self-align purpose, realize car load optimum operation effect.
Fig. 1 is the scheme drawing of three kinds of road conditions experiencing at day-to-day operation of the vehicle of the embodiment of the invention, as shown in the figure, three kinds of road conditions descending patterns (A) that the vehicle day-to-day operation experiences, level land operation (B), upward slope pattern (C) are carried out the inclination angle, ramp respectively and are calculated, along with the difference of the inclination angle number of degrees of measuring, the car load resistance to motion also can change thereupon.After the operation road conditions gradient was accurately calculated, car load power control pattern can be adjusted automatically according to the resistance to motion that stands in the vehicle operating process, reaches the best operation mode state of vehicle.
Under (A) operational mode, assisting down of descending inertial force, car load requires the power capacity that is used for anti-resistance can be too not high, and the pure dynamic mode that only needs power battery pack to provide can guarantee the safety and steady operation of vehicle.
When (B) mode state, the resistance that will overcome during vehicle travels has rolling resistance F
f, air resistance F
wWith resistance due to acceleration F
jBy above-mentioned ramp angles formula as can be known: sin(α+θ) numerical value approaches zero, and the ramp inclination alpha number of degrees are close to or are parallel to the ground fully.Be in the steady accelerating action of best power source control operational mode and vehicle for guaranteeing vehicle this moment, and electrical motor performance booster action for driving engine provides the auxiliary energy source, reduces car load to the simple dependence of engine power.
When (C) mode state, ramp angles α constantly changes under car brakeing is accelerated, and car load this moment needed resistance in service has rolling resistance of wheel, air resistance, grade resistance and resistance due to acceleration.Dual the exerting pressure of ramp angles α and resistance to motion shows that car load need have bigger power capacity.The mode of operation of driving engine will be adjusted into the maximum power output mode, namely with full load mode work in order to keep the optimum operation of vehicle this moment.
Claims (3)
1. method of automatically adjusting hybrid vehicle power control pattern, it is characterized in that, described method is by the calculating to gradient inclination angle in the vehicle driving-cycle, utilize banking inclinometer to the travel sensitivity response in ramp in the road conditions of vehicle, finish car load to the accurate judgement of concrete driving cycle, and then reach power control pattern self-align purpose, realize car load optimum operation effect.
2. the method for a kind of automatic adjustment hybrid vehicle power control pattern according to claim 1 is characterized in that, the computing formula at described gradient inclination angle is:
sin（α+θ）=（T
tqi
gi
oηT/r-C
DAu
a 2/21.15-δmd
u/d
t）/G
；
Wherein, α is inclination angle, the ramp number of degrees, T
TqThe mean engine torque, i
gBe transmission ratio, i
oBe the main reduction gear transmitting ratio, η T is driving efficiency, and r is the rolling tire radius, C
DBe aerodynamic drag factor, A is the area of conter of vehicle heading, u
aRefer to running velocity, δ is the automobile correction coefficient of rotating mass, vehicle mass m, d
u/ d
tBe the acceleration/accel that travels, the G masterpiece of attaching most importance to firmly equals mg, cos θ=(1/
).
3. method of automatically adjusting hybrid vehicle power control pattern, it is characterized in that, three kinds of road conditions that described method experiences the vehicle day-to-day operation are divided into descending operation (A), level land operation (B), the operation (C) of going up a slope, respectively three kinds of road conditions being carried out the inclination angle, ramp calculates, along with the difference of the inclination angle number of degrees that calculate, the car load resistance to motion also can change thereupon;
Under (A) operational mode, assisting down of descending inertial force, car load requires the power capacity that is used for anti-resistance can be too not high, and the pure dynamic mode that only needs power battery pack to provide can guarantee the safety and steady operation of vehicle;
When (B) mode state, the resistance that will overcome during vehicle travels has rolling resistance F
f, air resistance F
wWith resistance due to acceleration F
jBy the ramp angles formula as can be known: sin(α+θ) numerical value approaches zero, and the ramp inclination alpha number of degrees are close to or are parallel to the ground fully; Be in the steady accelerating action of best power source control operational mode and vehicle for guaranteeing vehicle this moment, and electrical motor performance booster action for driving engine provides the auxiliary energy source, reduces car load to the simple dependence of engine power;
When (C) mode state, ramp angles α constantly changes under car brakeing is accelerated, and car load this moment needed resistance in service has rolling resistance of wheel, air resistance, grade resistance and resistance due to acceleration; Dual the exerting pressure of ramp angles α and resistance to motion shows that car load need have bigger power capacity; The mode of operation of driving engine will be adjusted into the maximum power output mode, namely with full load mode work in order to keep the optimum operation of vehicle this moment.
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Cited By (7)
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|---|---|---|---|---|
| CN104554544A (en) * | 2013-10-24 | 2015-04-29 | 株式会社岛野 | Slope calculation device |
| CN105270402A (en) * | 2014-07-21 | 2016-01-27 | Zf腓德烈斯哈芬股份公司 | Method for anticipatory controlling a cruise control of a motor vehicle |
| CN106677913A (en) * | 2015-11-10 | 2017-05-17 | 中联重科股份有限公司 | Power and load matching control method, device and system and transport vehicle |
| CN107757622A (en) * | 2017-08-29 | 2018-03-06 | 宝沃汽车（中国）有限公司 | The compensation method of vehicle torque, device and vehicle |
| CN109803865A (en) * | 2016-09-28 | 2019-05-24 | 五十铃自动车株式会社 | Section determination device and section determining method |
| CN111137266A (en) * | 2019-12-20 | 2020-05-12 | 一汽解放汽车有限公司 | Control method, device and equipment of vehicle air processing unit and vehicle |
| CN111452792A (en) * | 2020-03-09 | 2020-07-28 | 北汽福田汽车股份有限公司 | Vehicle control method and system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104554544A (en) * | 2013-10-24 | 2015-04-29 | 株式会社岛野 | Slope calculation device |
| CN105270402A (en) * | 2014-07-21 | 2016-01-27 | Zf腓德烈斯哈芬股份公司 | Method for anticipatory controlling a cruise control of a motor vehicle |
| CN105270402B (en) * | 2014-07-21 | 2019-08-20 | Zf腓德烈斯哈芬股份公司 | Method for predictably controlling the speed adjustment equipment of motor vehicle |
| CN106677913A (en) * | 2015-11-10 | 2017-05-17 | 中联重科股份有限公司 | Power and load matching control method, device and system and transport vehicle |
| CN106677913B (en) * | 2015-11-10 | 2019-11-01 | 中联重科股份有限公司 | Power and load matching control method, device and system and transport vehicle |
| CN109803865A (en) * | 2016-09-28 | 2019-05-24 | 五十铃自动车株式会社 | Section determination device and section determining method |
| CN109803865B (en) * | 2016-09-28 | 2022-03-22 | 五十铃自动车株式会社 | Section determining device and section determining method |
| CN107757622A (en) * | 2017-08-29 | 2018-03-06 | 宝沃汽车（中国）有限公司 | The compensation method of vehicle torque, device and vehicle |
| CN107757622B (en) * | 2017-08-29 | 2019-09-20 | 宝沃汽车（中国）有限公司 | The compensation method of vehicle torque, device and vehicle |
| CN111137266A (en) * | 2019-12-20 | 2020-05-12 | 一汽解放汽车有限公司 | Control method, device and equipment of vehicle air processing unit and vehicle |
| CN111452792A (en) * | 2020-03-09 | 2020-07-28 | 北汽福田汽车股份有限公司 | Vehicle control method and system |
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Application publication date: 20131009 |