CN108053660A - A kind of control method of reduction vehicle exhaust CO2 emission towards traffic flow - Google Patents
A kind of control method of reduction vehicle exhaust CO2 emission towards traffic flow Download PDFInfo
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Abstract
The invention discloses a kind of control methods of the reduction vehicle exhaust CO2 emission towards traffic flow.The basic thought of this method is for urban road, by optimizing travel speed and transport condition of the vehicle in signal lamp intersection, reduce the crossing stand-by period, it keeps vehicle at the uniform velocity or gives it the gun through signal lamp intersection, the bus capacity of signal lamp intersection is improved, reduces Vehicular exhaust CO2 emissions.To achieve the above object, the control method of the reduction vehicle exhaust CO2 emission proposed by the present invention towards traffic flow comprises the following steps：Data acquisition is carried out to urban road and intersection relevant parameter；Carry out Transcation agent；Judge whether Vehicle Speed meets setting condition, and select corresponding flow.
Description
Technical field
The present invention relates to a kind of control method of the reduction vehicle exhaust CO2 emission towards traffic flow, for reducing
The discharge of city vehicle tail gas carbon dioxide belongs to traffic control and traffic emission reduction field.
Background technology
Carbon dioxide is to cause global warming and one of the principal element of situations such as sea level rise.And in vehicle exhaust
Carbon dioxide is then one of significant contributor of global carbon dioxide.With uprushing for car ownership in recent years, vehicle tail
Total carbon dioxide capacity in gas is increasing.Therefore, the CO2 emission reduced in Vehicular exhaust is slowing global warming etc.
One of the important means of climatic phenomenon speed.
At present, can be known according to the vehicle exhaust CO2 emission formula worked out, tail gas carbon dioxide discharge capacity
It is related with distance travelled, running time, acceleration-deceleration state and fuel oil etc..Destination clearly and the fixed situation of vehicle
Under, CO2 emissions can be reduced by changing acceleration-deceleration state.
By controlling wagon flow and travel speed, the reduction vehicle intersection stand-by period changes the relevant parameter in discharge formula,
By controlling road traffic CO2 emission, so as to change the total release of region carbon dioxide, energy-saving and emission-reduction are finally realized
And the purpose that vehicle passes unimpeded.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of reduction vehicle exhaust carbon dioxide towards traffic flow and arrange
The control method put, this method is directed to urban road, by optimizing travel speed and traveling of the vehicle in signal lamp intersection
State reduces the crossing stand-by period, keeps vehicle at the uniform velocity or gives it the gun through signal lamp intersection, improves signal lamp intersection
Bus capacity, reduce Vehicular exhaust CO2 emissions.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of control method of reduction vehicle exhaust CO2 emission towards traffic flow, it is characterised in that：Including such as
Lower step：
S1：Data acquisition is carried out to urban road and intersection relevant parameter, including：
The distance d of an intersection, the number of track-lines n of road, intersection in distance on the four direction of crossroad
Straight trip width R, left-hand rotation path distance dl, right-hand rotation path distance dr, each lane traffic flow f, vehicle average speed v, vehicle
Speed vi, minimum safe distance ds；
S2：Transcation agent is carried out, designs maximum permission speed and initialization traffic lights cycle, including：
S21：Category of roads is divided according to road actual conditions, the maximum permission speed of two-way lane is set
S22：Stationary phase cycle (the G of initialization is setr+Gg+Gy), wherein Gr, Gg, Gy represent respectively red light, green light,
Amber light phase；
Data dynamic according to being obtained in S1 changes the traffic lights cycle：
I is the cycle；
S23：According to foregoing definite traffic data, vehicle emissions reduction model area length L, buffer area length l are set；Root
The link length data d measured according to S1, obtains vehicle emissions reduction zone length L=d-l；
S3：Judge whether Vehicle Speed meets setting condition, and select corresponding flow, including：
S31：According to S1 and S2 setting initialization maximum speedsWherein,Vehicle withOn track
Traveling；S32：Maximum travelling speed calculates：
When the vehicle on road A and the road B intersected with it is to initialize speed operation, backstage center calculation connects down
Carry out maximum operational speed during second round,
It is assumed that maximum operational speed is under the second round of road AMaximum operational speed under the second round of road B
ForWhen all vehicles in A roads emission reduction region under the period 1 reach crossing and pass through intersection, buffer area
In first car reach exactly to emission reduction region crossing；At the same time, buffer area first car reaches exactly to emission reduction in road B
Region crossing waits next cycle, obtains the following formula：
In formula, L is distance of the road first car apart from buffer area, and r is the half-breadth of intersection, x0
For the safe distance between vehicles of first car in last vehicle in the L of region and buffer area l；
According to above-mentioned formula, it may be determined that the maximum travelling speed under second round, whenOr
When, vehicle will be notified to initialize maximum speed from the backgroundTraveling, otherwise will not notify, vehicle is under this cycle for giving tacit consent to
Maximum travelling speedTraveling；
S33：Judge whether travel speed is more than the maximum permission speed set, including：
Initialization speed and the signal lamp cycle of operation in step S31 calculate the vehicle traveling under i-th of cycle
Maximum speedAnd judge that the vehicle travels maximum speedWhether it is more than setting road maximum permission speedWhen more than
During the setting value, maximum travelling speed will be initialized as againIf not less than setting value, vehicle will continue with the maximum row
Sail speed traveling.
A kind of control method of foregoing reduction vehicle exhaust CO2 emission towards traffic flow, it is characterised in that：
The safe distance between vehicles x0Calculation formula be：
In formula, τ is time of driver's reaction, and v is current driving speed, and a is vehicle deceleration, and b is effective stop distance.
A kind of control method of foregoing reduction vehicle exhaust CO2 emission towards traffic flow, it is characterised in that：
The red light phase Gr, green light phase Gg, the initialization cycle of amber light phase Gy are respectively Gr=25s；Gg=30s；Gy=5s.
4th, the controlling party of a kind of reduction vehicle exhaust CO2 emission towards traffic flow according to claim 1
Method, it is characterised in that：It is describedIt is calculated and obtained by equation below：
A kind of control method of foregoing reduction vehicle exhaust CO2 emission towards traffic flow, it is characterised in that：
It is divided according to road quality classification, setting maximum permission speed is Class III highway maximum permission speed valueFor 60Km/h, Class II highway
ForFor 80Km/h.
A kind of control method of foregoing reduction vehicle exhaust CO2 emission towards traffic flow, it is characterised in that：
Road buffering zone length l is set as 20m.
The beneficial effects of the invention are as follows：
1st, compared with traditional stationary phase cycle methods, a kind of reduction car tail towards traffic flow proposed by the present invention
The control method of air carbon dioxide discharge, reduces the stand-by period of automobile intersection, improves road passage capability.
2nd, the control method of a kind of reduction vehicle exhaust CO2 emission towards traffic flow proposed by the present invention, shortens
Running time, reduces the discharge of tail gas carbon dioxide.
Description of the drawings
Fig. 1 is a kind of maximum row of the control method of reduction vehicle exhaust CO2 emission towards traffic flow of the present invention
Sail velocity estimated flow chart；
Fig. 2 is a kind of crossroad of the control method of reduction vehicle exhaust CO2 emission towards traffic flow of the present invention
Mouth schematic diagram.
Specific embodiment
It is in order to make those skilled in the art better understand the technical solutions in the application, real below in conjunction with the application
The attached drawing in example is applied, the technical solution in the embodiment of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
Technical staff's all other embodiments obtained without making creative work should all belong to the application protection
Scope.
The core concept of the present invention is by changing traffic flow modes, the vehicle intersection stand-by period being reduced, so as to reduce vehicle
The discharge of tail gas carbon dioxide.By taking some road as an example, when reducing vehicle exhaust CO2 emission using the present invention, to this hair
It is bright to be described further, referring to Fig. 2.
It is as follows：
S1：Data acquisition is carried out to urban road and intersection relevant parameter, including：
The distance d of an intersection, the number of track-lines n of road, intersection in distance on the four direction of crossroad
Straight trip width R, left-hand rotation path distance dl, right-hand rotation path distance dr, each lane traffic flow f, vehicle average speed v, vehicle
Speed vi, minimum safe distance ds；
S2：Transcation agent is carried out, designs maximum permission speed and initialization traffic lights cycle, including：
S21：Category of roads is divided according to road actual conditions, the maximum permission speed of two-way lane is setAccording to public affairs
Road grade classification, it is Class III highway maximum permission speed value 60Km/h, Class II highway 80Km/h to set maximum permission speed.
S22：Stationary phase cycle (the G of initialization is setr+Gg+Gy), wherein Gr, Gg, Gy represent respectively red light, green light,
Amber light phase；Initialization cycle is respectively Gr=25s；Gg=30s；Gy=5s.
Data dynamic according to being obtained in S1 changes the traffic lights cycle：
I is the cycle.
S23：According to foregoing definite traffic data, vehicle emissions reduction model area length L, buffer area length l are set；If
Road buffering region is determined for 20m, and the link length data d measured according to S1 obtains vehicle emissions reduction zone length L=d-l.
S3：Judge whether Vehicle Speed meets setting condition, and select corresponding flow, including：
S31：According to S1 and S2 setting initialization maximum speedsWherein,Vehicle withOn track
Traveling；
S32：Maximum travelling speed calculates：
When the vehicle on road A and the road B intersected with it is to initialize speed operation, backstage center calculation connects down
Carry out maximum operational speed during second round,
It is assumed that maximum operational speed is under the second round of road AMaximum operational speed under the second round of road B
ForWhen all vehicles in A roads emission reduction region under the period 1 reach crossing and pass through intersection, buffer area
In first car reach exactly to emission reduction region crossing；At the same time, buffer area first car reaches exactly to emission reduction in road B
Region crossing waits next cycle.Obtain the following formula：
In formula, L as shown is distance of the road first car apart from buffer area, and r is the half-breadth of intersection,x0For the safe distance between vehicles of first car in last vehicle in the L of region and buffer area l；
According to above-mentioned formula, it may be determined that the maximum travelling speed under second round, whenOr
When, vehicle will be notified to initialize maximum speed from the backgroundTraveling, otherwise will not notify, vehicle is under this cycle for giving tacit consent to
Maximum travelling speedTraveling；Without loss of generality, subsequent processes are calculated with above-mentioned according to above-mentioned formula and Fig. 1
Judge, after the n times cycle of operation is reached, initialize again；
S33：Judge whether travel speed is more than the maximum permission speed set, including：
Initialization speed and the signal lamp cycle of operation in step S31 calculate the vehicle traveling under i-th of cycle
Maximum speedAnd judge that the vehicle travels maximum speedWhether it is more than setting road maximum permission speedWhen more than
During the setting value, maximum travelling speed will be initialized as againIf not less than setting value, vehicle will continue with the maximum row
Sail speed traveling.
Wherein safe distance between vehicles x0Calculation formula be：
In formula, τ is time of driver's reaction, and v is current driving speed, and a is vehicle deceleration, and b is effective stop distance.
Data in abovementioned steps, with reference to the formula of following vehicle exhaust CO2 emission：
E=Kc(0.3T+0.028D+0.056Aee)
Wherein：
E is CO2 emission value (g),
KcFor fuel oil and CO2 emission coefficient ratio,
D is distance travelled (m),
T is running time,
vkFor the kth second when speed (m/s),
σk:If vk＞ vk-1, σk=1；In the case of other, σk=0,
In the case of if traveling distance is fixed, the K of same vehiclecAlways consistent, then Vehicular exhaust carbon dioxide is arranged
High-volume size is only related with speed, running time and σ.
Therefore, above-mentioned formula can be reduced to：
As f (k) and g (k) while when being minimized, F (k) obtains minimum value.For f (k), if vkIt is fixed, and it takes most
During big value, f (k) is minimized.When vehicle is at the uniform velocity or during Reduced Speed Now, σk=0, g (k) is minimized.Therefore, when vehicle always
With maximum speedAt the uniform velocity when driving, f (k) and g (k) while minimum value is obtained, F (k) obtains minimum optimal value.
Model formation is calculated according to the vehicle exhaust carbon dioxide after can must optimizing above：
It can be seen that in road desired Safety, when vehicle reaches crossing, within the time of permission, keep even
When speed or acceleration mode traveling are through signal lamp intersection, the vehicle intersection stand-by period can not only be reduced, signal lamp is improved and hands over
The bus capacity of prong, and advantageously reduce Vehicular exhaust CO2 emissions.Therefore, in this control method,
In each phase cycling, only when its maximum operational speedMore than the maximum permission speed of settingWhen, backstage just can
Vehicle is notified to initialize maximum speedTraveling, otherwise will not notify, vehicle is with the maximum traveling speed under this cycle for giving tacit consent to
DegreeTraveling, to ensure minimum CO2 emissions.
Basic principle, the main features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
Boundary.
Claims (6)
1. a kind of control method of reduction vehicle exhaust CO2 emission towards traffic flow, it is characterised in that：Including as follows
Step：
S1：Data acquisition is carried out to urban road and intersection relevant parameter, including：
The distance d of an intersection in distance on the four direction of crossroad, the number of track-lines n of road, intersection it is straight
Line width R, left-hand rotation path distance dl, right-hand rotation path distance dr, each lane traffic flow f, vehicle average speed v, car speed
vi, minimum safe distance ds；
S2：Transcation agent is carried out, designs maximum permission speed and initialization traffic lights cycle, including：
S21：Category of roads is divided according to road actual conditions, the maximum permission speed of two-way lane is set
S22：Stationary phase cycle (the G of initialization is setr+Gg+Gy), wherein Gr, Gg, Gy represent red light, green light, amber light respectively
Phase；
Data dynamic according to being obtained in S1 changes the traffic lights cycle：
I is the cycle；
S23：According to foregoing definite traffic data, vehicle emissions reduction model area length L, buffer area length l are set；According to S1
The link length data d measured, obtains vehicle emissions reduction zone length L=d-l；
S3：Judge whether Vehicle Speed meets setting condition, and select corresponding flow, including：
S31：According to S1 and S2 setting initialization maximum speedsWherein,Vehicle withIt is travelled on track；
S32：Maximum travelling speed calculates：
When the vehicle on road A and the road B intersected with it is to initialize speed operation, backstage center calculation following the
Maximum operational speed during two cycles,
It is assumed that maximum operational speed is under the second round of road AMaximum operational speed is under the second round of road BWhen all vehicles in A roads emission reduction region under the period 1 reach crossing and pass through intersection, in buffer area
First car reach exactly to emission reduction region crossing；At the same time, buffer area first car reaches exactly to abatement section in road B
Domain crossing waits next cycle, obtains the following formula：
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In formula, L is distance of the road first car apart from buffer area, and r is the half-breadth of intersection,x0For region
The safe distance between vehicles of last vehicle and first car in the l of buffer area in L；
According to above-mentioned formula, it may be determined that the maximum travelling speed under second round, whenOrWhen, after
Platform will notify vehicle to initialize maximum speedTraveling, otherwise will not notify, vehicle is with the maximum row under this cycle for giving tacit consent to
Sail speedTraveling；
S33：Judge whether travel speed is more than the maximum permission speed set, including：
Initialization speed and the signal lamp cycle of operation in step S31, the vehicle traveling calculated under i-th of cycle are maximum
SpeedAnd judge that the vehicle travels maximum speedWhether it is more than setting road maximum permission speedIt is set when more than this
During definite value, maximum travelling speed will be initialized as againIf not less than setting value, vehicle will continue to travel speed with the maximum
Degree traveling.
2. a kind of control method of reduction vehicle exhaust CO2 emission towards traffic flow according to claim 1,
It is characterized in that：The safe distance between vehicles x0Calculation formula be：
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In formula, τ is time of driver's reaction, and v is current driving speed, and a is vehicle deceleration, and b is effective stop distance.
3. a kind of control method of reduction vehicle exhaust CO2 emission towards traffic flow according to claim 1,
It is characterized in that：The red light phase Gr, green light phase Gg, the initialization cycle of amber light phase Gy are respectively Gr=25s；Gg=
30s；Gy=5s.
4. a kind of control method of reduction vehicle exhaust CO2 emission towards traffic flow according to claim 1,
It is characterized in that：It is describedIt is calculated and obtained by equation below：
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5. a kind of control method of reduction vehicle exhaust CO2 emission towards traffic flow according to claim 1,
It is characterized in that：It is divided according to road quality classification, setting maximum permission speed is Class III highway maximum permission speed valueFor
60Km/h, Class II highway areFor 80Km/h.
6. a kind of control method of reduction vehicle exhaust CO2 emission towards traffic flow according to claim 1,
It is characterized in that：Road buffering zone length l is set as 20m.
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| CN113313321A (en) * | 2021-06-17 | 2021-08-27 | 广东工业大学 | Carbon emission calculation method for vehicles passing through road maintenance operation area |
| CN114820259A (en) * | 2022-03-28 | 2022-07-29 | 武汉大学 | Real-time calculation method for road vehicle tail gas carbon dioxide emission based on space-time deep learning model |
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