CN105109487A - Speed optimization method for efficient running of vehicle - Google Patents

Abstract

The invention relates to a speed optimization method for the efficient running of a vehicle. A most optimal or approximate optimum vehicle running speed is obtained by comprehensively taking into consideration of the factors, such as the distance from the current position of the vehicle to a next traffic post and the traffic signal transformation period on the basis of considering the intention of a driver and the vehicle running condition, the driver is reminded of modifying the running strategy in time, further the revolving speed of a vehicle drive device is caused to be within the efficient running range as much time as possible, and the economy and safety of running of the vehicle are enhanced to a greater extent. The endurance mileage of the vehicle is effectively increased when the speed optimization method is applied to the technical field of pure electric vehicles, and a better theoretical basis is laid for the safe running of the vehicle and efficient running of smart cars.

Description

A vehicle speed optimization method for efficient operation

technical field

The invention relates to the technical field of vehicle control, and more specifically, to a method for optimizing vehicle speed during efficient operation of a vehicle.

Background technique

Sustained and rapid economic development has made problems such as energy shortage and environmental pollution increasingly prominent. Accelerating the cultivation and development of efficient new automotive technologies is an important strategic measure for the automotive industry. Efficient operation of automobile power plant is one of the main solutions to save energy and reduce emissions. A vehicle speed optimization method for efficient operation will enable the vehicle to obtain a more efficient operating speed, so that the vehicle is in an efficient operating state most of the time .

At the present stage, the vehicle operating speed is mostly considered when the driver's intention, vehicle operating conditions and vehicle load state are considered. On this basis, the speed of the vehicle driving device is kept in the efficient operating range as far as possible, and the distance from the current position of the vehicle to the next traffic post is not considered. Factors such as distance and the changing cycle of traffic lights cause the driver to lack a certain purpose in driving the vehicle. For example, the driver sees the traffic direction signal light is red, and controls the vehicle to drive at a low speed a long distance in advance. At this time, the speed of the drive device is likely to be outside the high-efficiency operating range; or the driver sees the traffic direction signal light as a green light, and the driver thinks that there is enough time Accelerate to pass through, but if the signal light turns yellow when approaching the traffic post, emergency braking is required, resulting in that the speed of the drive device is not within the high-efficiency operating range during acceleration, and energy is wasted during emergency braking, and even cause a traffic accident.

In order to keep the speed of the vehicle driving device in the high-efficiency operating range as much as possible and reduce the probability of traffic accidents, the inventor introduced the distance between the current position of the vehicle and the next traffic post and the change cycle of traffic lights in the vehicle speed optimization method. Based on these factors, the vehicle speed optimization method for high-efficiency vehicle operation of the present invention is proposed, which promptly reminds the driver to correct the vehicle speed, promotes the efficient operation of the vehicle drive device, and lays a theoretical foundation for the efficient operation of intelligent vehicles.

Contents of the invention

The purpose of inventing a vehicle speed optimization method for high-efficiency operation is to obtain the high-efficiency operation speed during vehicle operation, give full play to the high-efficiency dynamic characteristics of the vehicle drive device, reduce energy consumption during operation, and reduce the probability of traffic accidents. Under the premise of satisfying the driving intention of the driver and the normal operation of the vehicle, it can achieve the goals of energy saving, efficient and safe operation to the greatest extent, and lay the foundation for the theoretical design of efficient operation of intelligent vehicles, which has important scientific significance and theoretical value.

A vehicle speed optimization method for efficient operation of a vehicle proposed by the present invention is shown in Figure 1. The steps include S1: determining the initial value of the speed optimization of the driving device, S2: the real-time running speed of the vehicle, S3: determining the distance from the current position of the vehicle to the next traffic post, S4: Calculating the travel time to the next traffic post, S5: Obtaining the remainder t _re of the traffic signal transformation cycle with the next traffic post, S6: Is the next traffic post a traffic signal? S71: Obtain the end time t _R of the next traffic stop signal, S72: Obtain the end time t _G of the next traffic signal, S81: t _re > t _R ? S82: t _re < t _G ? and S9 to maintain the current speed.

The initial value of the speed optimization of the driving device in step S1 is determined by the driver's intention and the high-efficiency speed range of the driving device; steps S3, S5, S6, S71 and S72 are related to data such as the vehicle navigation system and traffic signal management system; the blocking of traffic in step S71 The signals include red and yellow lights on the driving route; step S2 is realized by adjusting the speed of the driving device or changing the gear of the gearbox; adjusting the speed of the driving device corresponding to step S2 must be within the high-efficiency operating speed range of the driving device.

Whether the speed of the vehicle driving device is in the high-efficiency operating range directly affects the driving economy of the vehicle. The vehicle speed optimization method for efficient vehicle operation of the present invention, on the basis of considering the driver's intention and vehicle operating conditions, comprehensively considers the distance between the current position of the vehicle and the next traffic. Based on factors such as the distance from the station and the changing cycle of traffic lights, the optimal or better vehicle running speed can be obtained, and the driver can be reminded to correct the running strategy in time, so that the speed of the vehicle driving device can be in the high-efficiency running range for as long as possible. To a certain extent, the economy of vehicle operation is improved, and it has the effect of reducing the probability of traffic accidents.

A vehicle speed optimization method for high-efficiency vehicle operation of the present invention is applicable to the technical field of vehicle control, especially when applied in the technical field of pure electric vehicles, it will effectively increase the cruising range of the vehicle; It has laid a good theoretical foundation. After the practical application of the vehicle speed optimization method for high-efficiency operation of the vehicle, the energy consumption of the drive device will be reduced to a large extent, and further economic benefits will be brought.

Description of drawings

Fig. 1 is a diagram of a vehicle speed optimization method for efficient operation of a vehicle according to the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, a method for optimizing the speed of a vehicle in efficient operation proposed by the present invention includes the following steps: S1: determine the initial value of the speed optimization of the driving device, S2: the real-time running speed of the vehicle, S3: determine the current position of the vehicle to the next traffic Post distance, S4: Calculate the travel time to the next traffic post, S5: Obtain the remainder t _re of the traffic signal transformation cycle with the next traffic post, S6: Is the next traffic post a traffic signal? S71: Obtain the end time t _R of the next traffic stop signal, S72: Obtain the end time t _G of the next traffic signal, S81: t _re > t _R ? S82: t _re < t _G ? and S9 to maintain the current speed.

A further preferred version of the present invention is:

The optimal initial value of the speed of the driving device in step S1 is determined by the driver's intention and the high-efficiency speed range of the driving device;

The steps S3, S5, S6, S71 and S72 are related to data such as the vehicle navigation system and the traffic signal management system;

The traffic blocking signal in step S71 includes red light and yellow light signals on the driving route;

The step S2 is realized by adjusting the speed of the driving device or changing the gear of the gearbox;

Adjusting the rotational speed of the driving device corresponding to step S2 needs to be within the high-efficiency operating speed range of the driving device.

A vehicle speed optimization method for efficient operation of a vehicle according to the present invention, as shown in Figure 1, first determines the initial value of the speed optimization of the drive device according to the driver's intention and the high-efficiency operation speed range of the drive device, and obtains the current time, current position and vehicle speed from the vehicle navigation system. The driving path, and then calculate the travel time of the vehicle to the next traffic post; obtain the traffic post signal conversion cycle through the traffic signal management system, and obtain the remainder t _re of the vehicle’s travel time to the next traffic post divided by the traffic post signal change cycle ; According to the data of the car navigation system and the traffic signal management system, determine the type of the next traffic post signal light and the end time of this type of signal light; on the driving route, when the next traffic post is a stop traffic signal, obtain the end time of the stop traffic signal t _R , when the next traffic post is a traffic signal, the end time t _G of obtaining the traffic signal. When t _re > t _R or t _re < t _G , keep the current vehicle speed unchanged, otherwise it is necessary to adjust the real-time running speed of the vehicle. When the vehicle is running in real time and the speed is adjusted, it is necessary to ensure that the speed of the drive device is within the high-efficiency running speed range. The vehicle speed optimization method for efficient running of vehicles according to the present invention can obtain the optimal or better running speed of the vehicle, and can remind the driver to correct the running strategy in time, so that the speed of the vehicle driving device can be within the high-efficiency running range for as long as possible , To a large extent, improve the economy and safety of vehicle operation.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (6)

1. a vehicle Effec-tive Function speed of a motor vehicle optimization method, is characterized in that, comprising:

S1. rotational speed of driving unit optimized initial value is determined;

S2. the vehicle real time execution speed of a motor vehicle;

S3. determine that current vehicle position is to next traffic post distance;

S4. the running time of next traffic post is calculated to;

S5. the remainder with next traffic post traffic signal transformation period is tried to achieve t _re;

Does is S6. next traffic post traffic signal?

S71. obtain next traffic post and stop the right of way signal end time t _r;

S72. next traffic post right of way signal end time is obtained t _g;

S81. t _re> t _R？

S82. t _re< t _G？

S9. current vehicle speed is kept.

2. a kind of vehicle Effec-tive Function speed of a motor vehicle optimization method according to claim 1, is characterized in that: the rotational speed of driving unit optimized initial value of described step S1 is determined by the efficient rotating speed interval of driver intention and actuating device.

3. a kind of vehicle Effec-tive Function speed of a motor vehicle optimization method according to claim 1, is characterized in that: described step S3, S5, S6, S71 and S72 are relevant to data such as onboard navigation system and traffic signal management systems.

4. a kind of vehicle Effec-tive Function speed of a motor vehicle optimization method according to claim 1, is characterized in that: the prevention right of way signal of described step S71 comprises red light on running route and steady yellow.

5. a kind of vehicle Effec-tive Function speed of a motor vehicle optimization method according to claim 1, is characterized in that: adjusting rotational speed of driving unit corresponding to described step S2 need in actuating device Effec-tive Function rotating speed interval.

6. a kind of vehicle Effec-tive Function speed of a motor vehicle optimization method according to claim 1 and 5, is characterized in that: described step S2 is realized by adjustment rotational speed of driving unit or conversion change speed gear box gear.