CN113815609A - Constant-speed cruise system and oil-saving control method and device thereof - Google Patents
Constant-speed cruise system and oil-saving control method and device thereof Download PDFInfo
- Publication number
- CN113815609A CN113815609A CN202010567713.1A CN202010567713A CN113815609A CN 113815609 A CN113815609 A CN 113815609A CN 202010567713 A CN202010567713 A CN 202010567713A CN 113815609 A CN113815609 A CN 113815609A
- Authority
- CN
- China
- Prior art keywords
- change rate
- rate
- torque
- torque change
- fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/14—Adaptive cruise control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2556/00—Input parameters relating to data
- B60W2556/10—Historical data
Abstract
The invention relates to a constant-speed cruise system and an oil-saving control method and device thereof. The method comprises the following steps: acquiring a historical driving track of the vehicle in the previous whole-course driving process; finding out and storing a first acceleration point of which the historical torque change rate exceeds a set torque change rate in the historical driving track; detecting current position information of a vehicle in a current driving process; increasing the torque at a first torque change rate at a set distance from the current position to a first acceleration point, so that the torque/vehicle speed of the current vehicle when the current vehicle runs to the first acceleration point is equal to the historical torque/vehicle speed of the first acceleration point; the first rate of torque change is lower than a historical rate of torque change corresponding to the first acceleration point. The invention records the condition of the acceleration point in the previous whole-course driving process, advances the acceleration point in the subsequent driving process at a lower torque change rate, grasps the driving condition in real time and adjusts the driving condition, and realizes the best oil-saving effect.
Description
Technical Field
The invention relates to a constant-speed cruise system and an oil-saving control method and device thereof, belonging to the technical field of vehicle energy control.
Background
In recent years, with the advancement of technology, a cruise control system has been developed to reduce the workload of a driver. The cruise control is a control for automatically maintaining the speed of the vehicle at a constant speed without stepping on an accelerator pedal after a cruise control switch is turned on at a speed requested by a driver.
In the conventional cruise control system, after the cruise control system is started in a cruise control state, the cruise control system generally runs at a set speed, and the output power of a vehicle cannot be adjusted according to road conditions, so that certain oil consumption is wasted. For this reason, a control method for cruise control according to road condition information is proposed, for example, chinese patent application publication No. CN 109910890 a discloses a system and a method for predicting energy saving of a truck based on road terrain information, which obtains road terrain information, mainly road gradient information, by using a positioning module, allows the speed of the truck to change within a certain speed margin, establishes an objective function including fuel consumption, speed tracking, speed change and braking, and solves an optimal control strategy for shifting, accelerating or braking by a dynamic programming algorithm, thereby realizing fuel control for cruise control at a constant speed, and simultaneously, the total travel time is not changed significantly.
However, the method calculates the control strategy through a modeling method, and for a certain road terrain, the method belongs to an ideal and fixed control strategy, and under many practical conditions, the method cannot be adjusted according to the practical conditions of the road, and waste of oil consumption is caused to a certain extent.
Disclosure of Invention
The application aims to provide an oil-saving control method of a constant-speed cruise system, which is used for solving the problem of high oil consumption caused by the conventional constant-speed cruise control method; meanwhile, an oil-saving control device of the constant-speed cruise system is also provided, so as to solve the problem of high oil consumption caused by the conventional constant-speed cruise control device; meanwhile, a constant-speed cruise system is also provided to solve the problem of high oil consumption of the conventional constant-speed cruise system.
In order to achieve the purpose, the application provides a technical scheme of an oil-saving control method of a constant-speed cruise system, which comprises the following steps:
1) acquiring a historical driving track of the vehicle in the previous whole-course driving process; the history travel track includes: historical position information of the vehicle, and historical torque and historical vehicle speed corresponding to each historical position;
2) finding out and storing a first acceleration point of which the historical torque change rate exceeds a set torque change rate in the historical driving track;
3) detecting current position information of a vehicle in a current driving process; increasing the torque at a first torque change rate at a set distance from the current position to the first acceleration point, so that the torque/vehicle speed of the current vehicle when the current vehicle runs to the first acceleration point is equal to the historical torque/vehicle speed of the first acceleration point; the first rate of torque change is lower than a historical rate of torque change at a first acceleration point.
In addition, the application also provides a technical scheme of the oil-saving control device of the constant-speed cruise system, which comprises a processor, a memory and a computer program which is stored in the memory and can be run on the processor, wherein the processor realizes the technical scheme of the oil-saving control method of the constant-speed cruise system when executing the computer program.
In addition, the application also provides a technical scheme of the constant-speed cruise system, which comprises a GPS positioning module, an information acquisition module and an oil-saving control device, wherein the oil-saving control device comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, and the processor realizes the technical scheme of the oil-saving control method of the constant-speed cruise system when executing the computer program.
The constant-speed cruise system and the oil-saving control method and device thereof have the beneficial effects that: since the fuel quantity is increased sharply due to the sudden rapid acceleration caused by the excessive torque change rate, the present invention adjusts the acceleration point at which the torque change rate is excessive. In the previous whole-course driving process, finding out an acceleration point with an overlarge torque change rate in a historical driving track, and aiming at the point with the overlarge torque change rate, carrying out slow acceleration in advance, namely starting acceleration at the position with the advanced acceleration point with a lower torque change rate until the vehicle speed/torque reaching the first acceleration point reaches the target vehicle speed/torque, so that the fuel quantity of the first acceleration point is reduced. According to the invention, the position and the torque change rate of the acceleration point are adjusted in the subsequent driving process according to the condition of the acceleration point recorded in the historical driving track, the driving condition is grasped in real time and adjusted, the optimal matching of the constant-speed cruise control and the road is realized, and the optimal oil-saving effect is also realized.
Furthermore, in the constant-speed cruise system and the fuel-saving control method and device thereof, in order to ensure the comfort and stability of constant-speed cruise, a deceleration point of the vehicle in a historical driving track and a second acceleration point of the last previous acceleration of the deceleration point are also found and stored; during the current trip, the vehicle increases torque at a second acceleration point at a second rate of torque change that is lower than a historical rate of torque change at the second acceleration point.
Further, in the cruise control system and the fuel-saving control method and device thereof, in order to balance the fuel-saving rate and the time cost, after the first torque change rate is lower than the set torque change rate, the total fuel amount and the running time length of each full-course running are counted, the fuel-saving rate is obtained according to the total fuel amount of two continuous full-course running, and the time change rate is obtained according to the running time length of two continuous full-course running; and adjusting the first torque change rate according to the oil saving rate and the time change rate.
Further, in the constant-speed cruise system and the oil-saving control method and device thereof, in order to avoid the situation that the driving time length is increased too much due to the reduction of the torque change rate and the comprehensive cost is increased, the oil-saving rate and the time change rate are weighted and superposed to obtain the comprehensive cost change rate; adjusting the first torque rate of change with the synthetic cost rate of change equal to 0 as a target; if the comprehensive cost change rate is far away from the target, increasing a first torque change rate; if the combined cost change rate is close to the target, the first torque change rate is reduced.
Further, in the constant-speed cruise system and the fuel-saving control method and device thereof, in order to balance the fuel-saving rate and the time cost, after the first torque change rate is lower than the set torque change rate and the deceleration point is eliminated, the total fuel amount and the running time of each whole-course running are counted, the fuel-saving rate is obtained according to the total fuel amount of the two continuous whole-course running, and the time change rate is obtained according to the running time of the two continuous whole-course running; and adjusting the first torque change rate and the second torque change rate according to the oil saving rate and the time change rate.
Further, in the constant-speed cruise system and the oil-saving control method and device thereof, in order to avoid the situation that the driving time length is increased too much due to the reduction of the torque change rate and the comprehensive cost is increased, the oil-saving rate and the time change rate are weighted and superposed to obtain the comprehensive cost change rate; adjusting the first torque rate of change and the second torque rate of change with the integrated cost rate of change equal to 0 as a target; if the comprehensive cost change rate is far away from the target, increasing a first torque change rate and a second torque change rate; if the combined cost change rate is close to the target, the first torque change rate and the second torque change rate are reduced.
Furthermore, in the cruise control system and the fuel-saving control method and device thereof, the fuel-saving rate is mainly used in the comprehensive cost, so the weight corresponding to the fuel-saving rate is greater than the weight corresponding to the time change rate.
Further, in the cruise control system and the fuel-saving control method and device thereof, the set torque change rate is set according to a test, and the set torque change rate is 20%.
Drawings
FIG. 1 is a schematic block diagram of the cruise control system of the present invention;
FIG. 2 is a schematic structural diagram of an oil saving control device of the constant speed cruise system of the present invention;
fig. 3 is a flowchart of an oil saving control method of the cruise control system according to embodiment 1 of the present invention;
fig. 4 is a flowchart of an oil-saving control method of the cruise control system according to embodiment 2 of the present invention;
fig. 5 is a flowchart of an oil saving control method of the cruise control system according to embodiment 3 of the present invention;
fig. 6 is a flowchart of an oil saving control method of the cruise control system according to embodiment 4 of the present invention.
Detailed Description
Embodiment mode 1
Constant speed cruise system embodiment:
the cruise control system provided by the embodiment comprises a GPS positioning module, an information acquisition module and an oil-saving control device shown in figure 2 as shown in figure 1. The GPS positioning module is used for collecting the position information of the vehicle, the information collecting module comprises a vehicle speed sensor and a torque sensor and is used for collecting the vehicle speed and the torque of the vehicle, the oil-saving control device comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, and the computer program instructions realize the original self control logic of the vehicle and the oil-saving control method. The GPS positioning module and the information acquisition module transmit acquired information to the oil-saving control device through the CAN bus, and the oil-saving control device outputs a control instruction after logic judgment so as to control the driving mechanism to output torque according to the control instruction.
During the running process of the vehicle, the relation between the torque and the vehicle speed is that the torque is increased, the vehicle speed is increased, the torque change rate is large, and the acceleration of the vehicle is large. The speed of a vehicle is not constant in the constant-speed cruising process, and in order to ensure that the speed of the vehicle is maintained in a range, the phenomenon of acceleration or braking can also occur, but the acceleration process easily causes overlarge oil consumption, so the invention provides the following technical scheme of an oil-saving control method to solve the problem of overlarge oil consumption.
The fuel-saving control method provided by the embodiment has the main conception that on the basis of the original self control logic of the vehicle, the acceleration point with the larger torque change rate is recorded in the constant-speed cruising section, and the optimal control parameter when the fuel-saving rate of the constant-speed cruising section is 0 is obtained by adjusting the control parameter; the control parameters include the position of the acceleration point and the rate of change of torque at the acceleration point.
The specific implementation process of the oil-saving control method is shown in figure 3, and comprises the following steps:
1) in the previous whole-course driving process, firstly, constant-speed cruise control is carried out according to the original self control logic of the vehicle, and in the whole process, the historical driving track of the vehicle is obtained: the method comprises the steps of acquiring each historical position in the driving process through a GPS positioning module, acquiring historical vehicle speed and historical torque corresponding to each historical position through an information acquisition module, finding out a first acceleration point in the process and storing the first acceleration point.
In the historical driving track, the point of speed increase in the historical vehicle speed corresponding to each historical position is an acceleration point; meanwhile, obtaining the historical torque change rate of the acceleration point according to the change of the torque at the acceleration point; a first acceleration point at which the history torque change rate Δ Torq exceeds 20% (i.e., the set torque change rate) is found and stored.
In order to ensure the accuracy of the data at the first acceleration point, the constant-speed cruise control is carried out for 2 times according to the original control logic of the vehicle, namely the first acceleration point and the historical torque change rate of each first acceleration point are recorded after the vehicle runs for 2 times according to the track. Of course, as other embodiments, the number of times of constant-speed cruising is not limited in the present invention, and may be 1 time or more.
The set torque change rate is a set value of 20% obtained from driving experience, and of course, the set torque change rate may be adjusted as needed, which is not limited by the present invention.
2) When the vehicle runs again, in the current constant-speed cruising running process, the following steps are added on the basis of the original self control logic of the vehicle: detecting current position information of the vehicle, increasing torque at a first torque change rate at a position where the current position is a set distance away from a first acceleration point, and enabling the torque/vehicle speed of the current vehicle to be equal to the historical torque/vehicle speed of the first acceleration point when the current vehicle runs to the first acceleration point; the first rate of change of torque is lower than a historical rate of change of torque at the first acceleration point (where the first rate of change of torque is a term indicating a regulation process at the first acceleration point, so that the value of the first rate of change of torque is variable).
During the previous full driving, the first acceleration point increases the fuel consumption, and is therefore adjusted. The position of the acceleration point is advanced, and the torque change rate is reduced at the advanced acceleration point, so that the vehicle speed can be ensured, and the fuel quantity can be reduced.
Specifically, the value of the first torque change rate is 10% lower than the historical torque change rate of the first acceleration point, as another embodiment, the invention does not limit the reduction of the historical torque change rate, the size of the first torque change rate can be gradually and slowly adjusted under the condition of ensuring the comfort level, and the size of the first torque change rate can be calculated according to the set distance and the target vehicle speed/torque to be achieved.
3) After the step 2) is executed, the fuel quantity needs to be evaluated, so that after the value of the first torque change rate is lower than 20%, the value of the first torque change rate is slightly (1% step length) reduced, the total fuel quantity of each subsequent full-journey running is counted, the fuel saving rate x% is obtained according to the total fuel quantity of two continuous full-journey running, the value of the first torque change rate is adjusted by taking the fuel saving rate equal to 0 (the fuel saving rate equal to 0 is not equal to 0 in an absolute sense and is close to 0) as a target, and if the fuel saving rate x% is close to the target 0, the value of the first torque change rate is reduced (forward adjustment); if the fuel saving rate x% is far from the target 0, the value of the first torque change rate is increased (reverse adjustment) until the fuel saving rate is equal to 0, which corresponds to the value of the first torque change rate being the optimum torque change rate.
The fine adjustment amount in the evaluation may be a smaller value, and the present embodiment is not limited thereto. Meanwhile, as for the evaluation form, an evaluation mode of comprehensive cost may also be adopted, and this embodiment is not limited.
The calculation process of the oil saving rate is as follows: the total fuel oil amount is x when the vehicle runs twice in a whole journey1And x2Then x% (x)1-x2)/x1100%, the fuel saving control method of the present embodiment is described below by taking the point a corresponding to the first acceleration point as an example:
in the previous driving process, the historical torque change rate of the position point A corresponding to the first acceleration point is 25%, the set torque change rate is 20% exceeded, then in the next driving process, the torque is increased at the position 250m in the front of the position point A, the torque is increased by taking the first torque change rate as 15% (the value of the first torque change rate is reduced by 10% on the basis of the historical torque change rate of the first acceleration point), and meanwhile, the current torque/vehicle speed of the vehicle passing through the position point A again is guaranteed to reach the historical torque/vehicle speed;
the first rate of change of torque of 15% has satisfied a requirement that is 20% below the set rate of change of torque, therefore, the fuel amount is evaluated, the value of the first torque change rate is changed to 14% next time, the value of the first torque change rate is changed to 13% next time, the fuel amount when the first torque change rate is 15% and the fuel amount when the first torque change rate is 14% are compared to obtain a first fuel saving rate, the fuel amount when the first torque change rate is 14% and the fuel amount when the first torque change rate is 13% are compared to obtain a second fuel saving rate, if the first and second fuel saving rates have the trend of change close to the target 0, the value of the first torque change rate is continuously decreased, if the change trends of the first oil saving rate and the second oil saving rate are far away from the target 0, the value of the first torque change rate needs to be increased, the oil saving rate is ensured until the oil saving rate is 0, and the corresponding first torque change rate is the optimal torque change rate.
The embodiment adjusts the first acceleration point with the overlarge torque change rate, and improves the oil saving effect.
The embodiment of the fuel-saving control device of the constant-speed cruise system comprises:
the fuel-saving control device of the constant-speed cruise system provided by the embodiment comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor realizes the fuel-saving control method of the constant-speed cruise system when executing the computer program, as shown in fig. 2.
The specific implementation process and effect of the fuel-saving control method of the cruise control system are described in the above embodiments of the cruise control system, and are not described herein again.
That is, the method in the above constant-speed cruise system embodiment should understand that the flow of the fuel-saving control method of the constant-speed cruise system can be realized by the computer program instructions. These computer program instructions may be provided to a processor (e.g., a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus), such that the instructions, which execute via the processor, create means for implementing the functions specified in the method flow.
The processor referred to in this embodiment refers to a processing device such as a microprocessor MCU or a programmable logic device FPGA;
the memory of the present embodiment is used for storing computer program instructions for implementing a fuel saving control method of a cruise control system, and includes a physical device for storing information, and the information is usually digitized and then stored in a medium using an electric, magnetic, or optical method. For example: various memories for storing information by using an electric energy mode, such as RAM, ROM and the like; various memories for storing information by magnetic energy, such as hard disk, floppy disk, magnetic tape, magnetic core memory, bubble memory, and U disk; various types of memory, CD or DVD, that store information optically. Of course, there are other ways of memory, such as quantum memory, graphene memory, and so forth.
The oil-saving control device of the constant-speed cruise system, which is formed by the memory and the processor, wherein the memory is used for storing computer program instructions formed by the oil-saving control method for realizing the constant-speed cruise system, and the processor executes corresponding program instructions in the computer, the computer can be realized by using a windows operating system, a linux system or other systems, for example, the computer can be realized by using android and iOS system programming languages in an intelligent terminal, and can be realized by processing logic based on a quantum computer.
As another embodiment, the fuel-saving control device of the cruise control system may further include other processing hardware, such as a database, a multi-level cache, a GPU, and the like.
The embodiment of the fuel-saving control method of the constant-speed cruise system comprises the following steps:
the implementation process and the effect of the fuel-saving control method of the cruise control system provided by the embodiment are already described in the embodiment of the cruise control system, and are not described herein again.
Embodiment mode 2
Constant speed cruise system embodiment:
the hardware structure and connection relationship of the cruise control system provided in this embodiment are the same as those of the cruise control system in embodiment 1, and are not described herein again. The difference from the cruise control system in embodiment 1 is that the cruise control system in this embodiment considers the braking phenomenon during the cruise control process, and makes the cruise control more stable and comfortable by eliminating the braking phenomenon, and in this embodiment, not only the phenomenon of excessive fuel consumption is considered, but also the influence of the running time on the overall cost is considered, and the overall cost rate is used to evaluate the adjustment parameters.
Specifically, the specific implementation process of the fuel-saving control method in the embodiment is shown in fig. 4, and includes the following steps:
1) in the previous whole-course driving process, firstly, constant-speed cruise control is carried out according to the original self control logic of the vehicle, and in the whole process, the historical driving track of the vehicle is obtained: the method comprises the steps of acquiring each historical position in the driving process through a GPS positioning module, acquiring historical vehicle speed and historical torque corresponding to each historical position through an information acquisition module, finding out a first acceleration point and a second acceleration point in the process, and storing the first acceleration point and the second acceleration point.
In the historical driving track, a point of speed increase in the historical vehicle speed corresponding to each historical position is an acceleration point, and a point of speed deceleration is a deceleration point (the deceleration point is a braking point, that is, a point of more deceleration, and the acquisition of the deceleration point can also be obtained by a braking signal of the vehicle, which is not limited in this embodiment); meanwhile, obtaining the historical torque change rate of each acceleration point according to the change of the torque at the acceleration point; find a first acceleration point at which the history torque change rate Δ Torq exceeds 20% (i.e., the set torque change rate) and a second acceleration point at which the latest acceleration is before the deceleration point (the speed before braking is V)0Stable speed after braking is V1The second acceleration point is the speed V before braking0The position point of the last increase in output torque) and stored.
In order to ensure the accuracy of data at the acceleration point, the constant-speed cruise control is carried out for 2 times according to the original control logic of the vehicle, namely a first acceleration point, a second acceleration point and a deceleration point of the vehicle are recorded after the vehicle runs for 2 times according to the track, and the historical torque change rate of each acceleration point. Of course, as other embodiments, the number of times of constant-speed cruising is not limited in the present invention, and may be 1 time or more.
The set torque change rate is a set value of 20% obtained from driving experience, and of course, the set torque change rate may be adjusted as needed, which is not limited by the present invention.
2) When the vehicle runs again, in the current constant-speed cruising running process, the following steps are added on the basis of the original self control logic of the vehicle: detecting current position information of the vehicle, increasing torque at a first torque change rate at a position where the current position is a set distance away from a first acceleration point, and enabling the torque/vehicle speed of the current vehicle to be equal to the historical torque/vehicle speed of the first acceleration point when the current vehicle runs to the first acceleration point; the first rate of change of torque is lower than a historical rate of change of torque at the first acceleration point; the vehicle increases torque at a second acceleration point according to a second rate of torque change that is lower than a historical rate of torque change at the second acceleration point (where the first rate of torque change and the second rate of torque change are terms that indicate a regulation process for the first acceleration point and the second acceleration point, so that the values of the first rate of torque change and the second rate of torque change are variable).
The adjustment procedure for the first acceleration point is the same as that in embodiment 1, and will not be described in detail here. And the reason for adjusting the second acceleration point is: the second acceleration point accelerates too much causing a deceleration point to exist.
Specifically, the value of the first torque change rate is lower than the historical torque change rate of the first acceleration point by 10%, and the value of the second torque change rate is lower than the historical torque change rate of the second acceleration point by 5%.
3) After the step 2) is executed, the comprehensive cost needs to be evaluated, after the first torque change rate is lower than 20% and the deceleration point is eliminated, tiny (1% step length) values for reducing the first torque change rate and the second torque change rate are continuously obtained, the total fuel quantity and the running time of each follow-up whole-course running are counted, the fuel saving rate x% is obtained according to the total fuel quantity of the two continuous whole-course running, and the time change rate y% is obtained according to the running time of the two continuous whole-course running; weighting and superposing the oil saving rate x% and the time change rate y% to obtain the comprehensive cost change rate of 0.7 x% +0.3 y%; the first torque rate of change and the second torque rate of change are adjusted with the goal that the overall cost rate of change is equal to 0 (where equal to 0 is not absolutely equal to 0, as close to 0 is sufficient).
In order to make the comprehensive cost change rate close to 0, a specific method for adjusting the current torque change rate of each acceleration point is as follows: judging whether the comprehensive cost change rate is close to a target 0, if so, indicating that the trend of torque change rate reduction can reduce the comprehensive cost, and continuously reducing the values of the first torque change rate and the second torque change rate by 1% each time, wherein the forward adjustment is performed; if moving away from target 0, indicating that the trend of decreasing torque rate increases the composite cost, the adjustment is reversed, increasing the values of the first and second torque rates in 1% steps until the composite cost rate is 0, at which point the values of the first and second torque rates are the optimal torque rates. The fine adjustment amount in the evaluation may be a smaller value, and the present embodiment is not limited thereto.
The reduction of the torque change rate can slow the acceleration of the vehicle, directly leads to the lengthening of the driving time, and can see from the comprehensive cost change rate whether the torque change rate corresponding to each acceleration point is the optimal torque conversion rate, namely whether the fuel quantity and the time cost are balanced.
In the above embodiment, the adjustment of the total cost is realized by adjusting the first torque change rate and the second torque change rate at the same time, as another embodiment, only the first torque change rate or the second torque change rate may be adjusted, and the adjustment manner is the same as that described above as long as the total cost change rate is close to 0.
In the above-described embodiment, the overall cost rate is used for evaluation, and as another embodiment, the fuel saving rate may be used for evaluation as in embodiment 1, or the time change rate may be used for evaluation.
Assuming that the total fuel quantity is x when the vehicle runs twice in a whole journey1And x2Then x% (x)1-x2)/x1100% of the total weight; assuming that the running time length of two consecutive full-distance runs is y1And y2Then y% (y)1-y2)/y1100%. The following describes the fuel saving control method of the present embodiment by taking a position point a corresponding to the first acceleration point, a deceleration point as a position point C, and a second acceleration point as a position point B as examples:
in the previous driving process, the historical torque change rate of a position point A corresponding to the first acceleration point is 25%, the set torque change rate is exceeded by 20%, the deceleration point is a position point C, the second acceleration point of the latest acceleration before the position point C is a position point B, and the historical torque change rate of the position point B is 15%;
then, when the vehicle is driven again, the torque is increased at the first 250m of the position a, and the torque is increased at the first torque change rate of 15% (the value of the first torque change rate is decreased by 10% on the basis of the history torque change rate of the first acceleration point), while also ensuring that the current torque/vehicle speed of the vehicle passing the position a again reaches the history torque/vehicle speed; when the torque is increased again through the position point B, the value of the second torque change rate is 10% (5% lower than the historical torque change rate of the second acceleration point), at which time the deceleration point is eliminated (if the deceleration point still occurs, when the position point B is again passed, the second torque change rate is continuously reduced to 5% until the deceleration point is eliminated);
the first torque change rate of 15% has satisfied the requirement of 20% below the set torque change rate, and the deceleration point disappears in the case where the value of the second torque change rate is 10%, so the overall cost rate is then evaluated, changing the value of the first torque change rate to 14% the next time, and the value of the second torque change rate to 9%; changing the value of the first torque change rate to 13% and the value of the second torque change rate to 8% next time;
comparing the fuel quantity when the first torque change rate is 15 percent and the second torque change rate is 10 percent with the fuel quantity and the running time when the first torque change rate is 14 percent and the second torque change rate is 9 percent to obtain a first fuel saving rate and a first time change rate, and calculating a first comprehensive cost rate; comparing the fuel quantity when the first torque change rate is 14 percent and the second torque change rate is 9 percent with the fuel quantity when the first torque change rate is 13 percent and the second torque change rate is 8 percent to obtain a second fuel saving rate and a second time change rate, and calculating to obtain a second comprehensive cost rate;
and if the change trends of the first comprehensive cost rate and the second comprehensive cost rate are close to the target 0, the value of the first torque change rate is continuously reduced, and if the change trends of the first comprehensive cost rate and the second comprehensive cost rate are far from the target 0, the value of the first torque change rate needs to be increased until the comprehensive cost rate is 0 and the corresponding first torque change rate and the second torque change rate are the optimal torque change rates.
In the control process of the constant-speed cruise system, in general, the condition of a road surface is simple, the torque change rate is increased, and the condition of jerky acceleration occurs, or some acceleration points are accelerated too much and point braking occurs, that is, the phenomenon of point braking occurs at some acceleration points, that is, the phenomenon of point braking occurs immediately after the torque change rate is large is rare, but if the condition occurs, any one of the two acceleration points can be adopted for control, and the control method is not limited.
According to the invention, the acceleration point with a large torque change rate is slowly accelerated in advance, so that the acceleration point with a deceleration point can reduce the torque change rate, the oil consumption is reduced with the lowest comprehensive cost, and the comfort of constant-speed cruising is improved.
The embodiment of the fuel-saving control device of the constant-speed cruise system comprises:
the fuel-saving control device of the constant-speed cruise system provided by the embodiment comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor realizes the fuel-saving control method of the constant-speed cruise system when executing the computer program, as shown in fig. 2.
The hardware structure of the fuel-saving control device of the cruise control system in this embodiment is the same as that of the fuel-saving control device in embodiment 1, and details are not described here; the specific implementation process and effect of the fuel-saving control method of the cruise control system realized by the fuel-saving control device are described in the embodiment of the cruise control system, and are not described herein.
The embodiment of the fuel-saving control method of the constant-speed cruise system comprises the following steps:
the implementation process and the effect of the fuel-saving control method of the cruise control system provided by the embodiment are already described in the embodiment of the cruise control system, and are not described herein again.
Embodiment 3
Constant speed cruise system embodiment:
the hardware structure and connection relationship of the cruise control system proposed in this embodiment are the same as those of the cruise control systems in embodiments 1 and 2, and are not described herein again. The difference from the cruise control system according to embodiment 1 is that, in order to achieve fuel saving control more easily, the specific implementation procedure of the fuel saving control method according to this embodiment is as shown in fig. 5, and the fuel saving effect can be achieved as long as the torque change rate at the first acceleration point is smaller than the set torque change rate, saving the procedure of evaluating the amount of fuel.
The definition of the first acceleration point in fig. 5 and how to adjust the first acceleration point are described in embodiment 1, and are not described herein.
The embodiment of the fuel-saving control device of the constant-speed cruise system comprises:
the fuel-saving control device of the constant-speed cruise system provided by the embodiment comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor realizes the fuel-saving control method of the constant-speed cruise system when executing the computer program, as shown in fig. 2.
The hardware structure of the fuel-saving control device of the cruise control system in this embodiment is the same as that of the fuel-saving control device in embodiment 1, and details are not described here; the specific implementation process and effect of the fuel-saving control method of the cruise control system realized by the fuel-saving control device are described in the embodiment of the cruise control system, and are not described herein.
The embodiment of the fuel-saving control method of the constant-speed cruise system comprises the following steps:
the implementation process and the effect of the fuel-saving control method of the cruise control system provided by the embodiment are already described in the embodiment of the cruise control system, and are not described herein again.
Embodiment 4
Constant speed cruise system embodiment:
the hardware structure and connection relationship of the cruise control system proposed in this embodiment are the same as those of the cruise control systems in embodiments 1 and 2, and are not described herein again. The difference from the cruise control system in embodiment 2 is that, in order to implement the fuel-saving control more easily, the specific implementation process of the fuel-saving control method in this embodiment is as shown in fig. 6, which saves the process of evaluating the overall cost, and as long as the torque change rate of the first acceleration point is smaller than the set torque change rate, the fuel-saving effect can be achieved, and the deceleration point is eliminated to ensure the driving comfort.
The definitions of the first acceleration point, the second acceleration point, and the braking point (i.e., the deceleration point) in fig. 6 and how to adjust the first acceleration point and the second acceleration point are already described in embodiments 1 and 2, and are not described herein again.
The embodiment of the fuel-saving control device of the constant-speed cruise system comprises:
the fuel-saving control device of the constant-speed cruise system provided by the embodiment comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor realizes the fuel-saving control method of the constant-speed cruise system when executing the computer program, as shown in fig. 2.
The hardware structure of the fuel-saving control device of the cruise control system in this embodiment is the same as that of the fuel-saving control device in embodiment 1, and details are not described here; the specific implementation process and effect of the fuel-saving control method of the cruise control system implemented by the fuel-saving control device are described in the cruise control system implementation mode 2, and are not described herein.
The embodiment of the fuel-saving control method of the constant-speed cruise system comprises the following steps:
the implementation process and the effect of the fuel-saving control method of the cruise control system provided by the embodiment are already described in the embodiment of the cruise control system, and are not described herein again.
Claims (10)
1. An oil-saving control method of a constant-speed cruise system is characterized by comprising the following steps:
1) acquiring a historical driving track of the vehicle in the previous whole-course driving process; the history travel track includes: historical position information of the vehicle, and historical torque and historical vehicle speed corresponding to each historical position;
2) finding out and storing a first acceleration point of which the historical torque change rate exceeds a set torque change rate in the historical driving track;
3) detecting current position information of a vehicle in a current driving process; increasing the torque at a first torque change rate at a set distance from the current position to the first acceleration point, so that the torque/vehicle speed of the current vehicle when the current vehicle runs to the first acceleration point is equal to the historical torque/vehicle speed of the first acceleration point; the first rate of torque change is lower than a historical rate of torque change at a first acceleration point.
2. The fuel-saving control method of a cruise control system according to claim 1, characterized by further finding and storing a deceleration point of the vehicle in the history travel track and a second acceleration point at which the vehicle was most recently accelerated before the deceleration point; during the current trip, the vehicle increases torque at a second acceleration point at a second rate of torque change that is lower than a historical rate of torque change at the second acceleration point.
3. The fuel-saving control method of the cruise control system according to claim 1, wherein after the first torque change rate is lower than the set torque change rate, the total fuel amount and the running duration of each full-course running are counted, the fuel-saving rate is obtained according to the total fuel amount of two consecutive full-course runs, and the time change rate is obtained according to the running duration of two consecutive full-course runs; and adjusting the first torque change rate according to the oil saving rate and the time change rate.
4. The fuel-saving control method of the cruise control system according to claim 3, characterized in that the fuel-saving rate and the time change rate are weighted and superimposed to obtain the comprehensive cost change rate; adjusting the first torque rate of change with the synthetic cost rate of change equal to 0 as a target; if the comprehensive cost change rate is far away from the target, increasing a first torque change rate; if the combined cost change rate is close to the target, the first torque change rate is reduced.
5. The fuel-saving control method of the cruise control system according to claim 2, wherein the first torque change rate is lower than the set torque change rate, and after the deceleration point is eliminated, the total fuel amount and the running duration of each full-distance running are counted, the fuel-saving rate is obtained according to the total fuel amount of two consecutive full-distance runs, and the time change rate is obtained according to the running duration of two consecutive full-distance runs; and adjusting the first torque change rate and the second torque change rate according to the oil saving rate and the time change rate.
6. The fuel-saving control method of the cruise control system according to claim 5, characterized in that the fuel-saving rate and the time change rate are weighted and superimposed to obtain the comprehensive cost change rate; adjusting the first torque rate of change and the second torque rate of change with the integrated cost rate of change equal to 0 as a target; if the comprehensive cost change rate is far away from the target, increasing a first torque change rate and a second torque change rate; if the combined cost change rate is close to the target, the first torque change rate and the second torque change rate are reduced.
7. The fuel-saving control method of the cruise control system according to claim 4 or 6, wherein the weight corresponding to the fuel-saving rate is greater than the weight corresponding to the time change rate.
8. The fuel-saving control method of a cruise control system according to claim 1, characterized in that said set torque change rate is 20%.
9. An oil-saving control device of a constant-speed cruise system, which is characterized by comprising a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor realizes the oil-saving control method of the constant-speed cruise system according to any one of claims 1-8 when executing the computer program.
10. A constant-speed cruise system, comprising a GPS positioning module and an information acquisition module, and is characterized by further comprising an oil-saving control device, wherein the oil-saving control device comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, and the processor realizes the oil-saving control method of the constant-speed cruise system according to any one of claims 1-8 when executing the computer program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010567713.1A CN113815609B (en) | 2020-06-19 | 2020-06-19 | Constant-speed cruising system and fuel-saving control method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010567713.1A CN113815609B (en) | 2020-06-19 | 2020-06-19 | Constant-speed cruising system and fuel-saving control method and device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113815609A true CN113815609A (en) | 2021-12-21 |
| CN113815609B CN113815609B (en) | 2023-08-01 |
Family
ID=78912048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010567713.1A Active CN113815609B (en) | 2020-06-19 | 2020-06-19 | Constant-speed cruising system and fuel-saving control method and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113815609B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004270718A (en) * | 2003-03-05 | 2004-09-30 | Nissan Motor Co Ltd | Driving force control device for vehicle |
| DE102008000696A1 (en) * | 2008-03-17 | 2009-09-24 | Robert Bosch Gmbh | Distance and speed control system i.e. adaptive cruise control-system, for motor vehicle i.e. lorry, has limiting device activatable by control element e.g. key, by driver and limiting variation range for acceleration of own vehicle |
| JP2010064576A (en) * | 2008-09-10 | 2010-03-25 | Masahiro Watanabe | Vehicle travel control method |
| CN104210494A (en) * | 2013-05-30 | 2014-12-17 | 大陆汽车电子(长春)有限公司 | Vehicle control method and device |
| CN104354696A (en) * | 2014-11-07 | 2015-02-18 | 奇瑞汽车股份有限公司 | Method for controlling fuel consumption of passenger vehicle |
| DE102014218077A1 (en) * | 2014-09-10 | 2016-03-10 | Robert Bosch Gmbh | Method and device for operating a motor vehicle, motor vehicle |
| WO2016186561A1 (en) * | 2015-05-20 | 2016-11-24 | Scania Cv Ab | Method and system for adjusting the acceleration of a vehicle travelling along a route |
| CN106467103A (en) * | 2015-08-13 | 2017-03-01 | 厦门雅迅网络股份有限公司 | A kind of Intelligent oil-saving control method of vehicle and system |
| KR101816247B1 (en) * | 2016-12-09 | 2018-01-08 | 현대오트론 주식회사 | Method to distribute engine and motor torque according to change rate of demand torque for hybrid electric vehicle |
| CN108068806A (en) * | 2016-11-11 | 2018-05-25 | 郑州宇通客车股份有限公司 | A kind of automobile engine cruise energy-saving control method and device |
| CN109291933A (en) * | 2017-07-14 | 2019-02-01 | 上海蔚来汽车有限公司 | Improve the method and system of electric vehicle course continuation mileage |
| CN109895769A (en) * | 2017-12-11 | 2019-06-18 | 郑州宇通客车股份有限公司 | Hybrid vehicle and constant-speed-cruise control method and control system |
| CN110155051A (en) * | 2019-04-30 | 2019-08-23 | 吉林大学青岛汽车研究院 | A kind of truck speed change cruise fuel-economizing controlling method |
| CN111016679A (en) * | 2019-11-28 | 2020-04-17 | 珠海格力电器股份有限公司 | Automobile control method and device, storage medium and 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 |
-
2020
- 2020-06-19 CN CN202010567713.1A patent/CN113815609B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004270718A (en) * | 2003-03-05 | 2004-09-30 | Nissan Motor Co Ltd | Driving force control device for vehicle |
| DE102008000696A1 (en) * | 2008-03-17 | 2009-09-24 | Robert Bosch Gmbh | Distance and speed control system i.e. adaptive cruise control-system, for motor vehicle i.e. lorry, has limiting device activatable by control element e.g. key, by driver and limiting variation range for acceleration of own vehicle |
| JP2010064576A (en) * | 2008-09-10 | 2010-03-25 | Masahiro Watanabe | Vehicle travel control method |
| CN104210494A (en) * | 2013-05-30 | 2014-12-17 | 大陆汽车电子(长春)有限公司 | Vehicle control method and device |
| DE102014218077A1 (en) * | 2014-09-10 | 2016-03-10 | Robert Bosch Gmbh | Method and device for operating a motor vehicle, motor vehicle |
| CN104354696A (en) * | 2014-11-07 | 2015-02-18 | 奇瑞汽车股份有限公司 | Method for controlling fuel consumption of passenger vehicle |
| WO2016186561A1 (en) * | 2015-05-20 | 2016-11-24 | Scania Cv Ab | Method and system for adjusting the acceleration of a vehicle travelling along a route |
| CN106467103A (en) * | 2015-08-13 | 2017-03-01 | 厦门雅迅网络股份有限公司 | A kind of Intelligent oil-saving control method of vehicle and system |
| CN108068806A (en) * | 2016-11-11 | 2018-05-25 | 郑州宇通客车股份有限公司 | A kind of automobile engine cruise energy-saving control method and device |
| KR101816247B1 (en) * | 2016-12-09 | 2018-01-08 | 현대오트론 주식회사 | Method to distribute engine and motor torque according to change rate of demand torque for hybrid electric vehicle |
| CN109291933A (en) * | 2017-07-14 | 2019-02-01 | 上海蔚来汽车有限公司 | Improve the method and system of electric vehicle course continuation mileage |
| CN109895769A (en) * | 2017-12-11 | 2019-06-18 | 郑州宇通客车股份有限公司 | Hybrid vehicle and constant-speed-cruise control method and control system |
| CN110155051A (en) * | 2019-04-30 | 2019-08-23 | 吉林大学青岛汽车研究院 | A kind of truck speed change cruise fuel-economizing controlling method |
| CN111016679A (en) * | 2019-11-28 | 2020-04-17 | 珠海格力电器股份有限公司 | Automobile control method and device, storage medium and 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 |
Non-Patent Citations (3)
| Title |
|---|
| 代玉军;成宣峰;高海;: "定速巡航系统功能介绍及注意事项", 科技视界 * |
| 梁崇宁;: "某纯电动汽车低速小油门标定研究", 汽车实用技术 * |
| 王宏朝;单希壮;杨志刚;: "矩阵风扇冷却系统模糊控制的研究", 汽车工程 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113815609B (en) | 2023-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2532988C2 (en) | Method and system for control over automatic vehicle speed maintenance system | |
| KR101607248B1 (en) | Method and module for controlling a vehicle's speed based on rules and/or costs | |
| KR101601889B1 (en) | Method and module for controlling a vehicle's speed based on rules and/or costs | |
| US9376109B2 (en) | Module and method pertaining to mode choice when determining reference values | |
| US20130035837A1 (en) | Module and a method pertaining to mode choice when determing vehicle speed set-point values | |
| EP2794329B1 (en) | Module and method pertaining to mode choice when determining reference values | |
| CN110893853B (en) | Vehicle control method and system based on front gradient information | |
| EP2585347A1 (en) | Method and module for controlling a vehicle's speed | |
| CN111976500B (en) | Torque filtering method, torque filtering device and vehicle | |
| SE1200392A1 (en) | transmission Control | |
| SE535356C2 (en) | Method and module for controlling the speed of a vehicle based on rules | |
| US11685388B2 (en) | Method and a control arrangement for determining a control profile for a vehicle | |
| SE534752C2 (en) | Method and module in connection with cruise control | |
| EP2794378A1 (en) | Method and module for determining of at least one reference value for a vehicle control system | |
| CN111169290A (en) | Vehicle running speed control method and system | |
| CN108116243B (en) | Method and device for adjusting electric quantity balance point of hybrid electric vehicle and vehicle | |
| CN113815609A (en) | Constant-speed cruise system and oil-saving control method and device thereof | |
| KR20230114798A (en) | Vehicle Predictive Control Method with Improved Computational Processing and Vehicle Driving Controlling System by the Same | |
| CN116620281B (en) | Adaptive cruise system ride control method, electronic equipment and storage medium | |
| CN114435141B (en) | Vehicle output torque control method and device | |
| CN117261905B (en) | Driving mode adjustment method and device and vehicle | |
| CN117341692A (en) | Vehicle cruise control method, cruise control device, equipment and storage medium | |
| CN116923400A (en) | Limit energy consumption intelligent cruise control method and device for pure electric vehicle | |
| CN117734455A (en) | Vehicle speed control method and device based on driving intention and new energy automobile | |
| CN116749704A (en) | Vehicle thermal management control method and device, vehicle and readable storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 6, Yutong Road, Guancheng Hui District, Zhengzhou, Henan 450061 Applicant after: Yutong Bus Co.,Ltd. Address before: No.1, Shibali Heyu Road, Guancheng Hui District, Zhengzhou City, Henan Province Applicant before: ZHENGZHOU YUTONG BUS Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |