阅读说明：本技术 轮胎胎压控制方法、装置和车辆 (Tire pressure control method and device and vehicle ) 是由 苗海龙 彭勃 于 2020-05-29 设计创作，主要内容包括：本公开涉及一种轮胎胎压控制方法、装置和车辆,属于车辆领域,能够在满足整车通过性、动力性的同时,还提升整车的经济性。一种轮胎胎压控制方法,包括：获取当前路况模式、当前驾驶模式、当前油门开度和当前车速,其中,所述路况模式包括公路模式、越野模式和松软模式,所述驾驶模式包括整车经济模式和整车动力模式；基于所述当前路况模式、所述当前驾驶模式、所述当前油门开度和所述当前车速,控制轮胎的胎压。(The disclosure relates to a tire pressure control method, a tire pressure control device and a tire pressure control vehicle, belongs to the field of vehicles, and can improve the economy of the whole vehicle while meeting the trafficability and the dynamic performance of the whole vehicle. A tire pressure control method, comprising: the method comprises the steps of obtaining a current road condition mode, a current driving mode, a current accelerator opening and a current vehicle speed, wherein the road condition mode comprises a road mode, an off-road mode and a soft mode, and the driving mode comprises a whole vehicle economy mode and a whole vehicle power mode; and controlling the tire pressure of the tire based on the current road condition mode, the current driving mode, the current accelerator opening and the current vehicle speed.)

1. A tire-pressure control method, characterized by comprising:

the method comprises the steps of obtaining a current road condition mode, a current driving mode, a current accelerator opening and a current vehicle speed, wherein the road condition mode comprises a road mode, an off-road mode and a soft mode, and the driving mode comprises a whole vehicle economy mode and a whole vehicle power mode;

and controlling the tire pressure of the tire based on the current road condition mode, the current driving mode, the current accelerator opening and the current vehicle speed.

2. The method of claim 1, wherein the controlling tire pressure of tires based on the current road condition mode, the current driving mode, the current accelerator opening, and the current vehicle speed comprises:

determining the current road condition mode, the current driving mode, the current accelerator opening and the corresponding target tire pressure under the current vehicle speed condition by using a preset corresponding table or a preset functional relation;

controlling the tire pressure of the tire using the target tire pressure.

3. The method of claim 2,

under the condition that the driving mode is the whole vehicle economic mode, the preset corresponding table or the preset function relationship is a corresponding table or a function relationship obtained by determining the corresponding relationship of the same road condition mode, the same vehicle speed, the minimum tire rolling resistance and the tire pressure through an experimental method;

and under the condition that the driving mode is the whole vehicle power mode, the preset corresponding table or the preset function relationship is a corresponding table or a function relationship obtained by determining the corresponding relationship of the same road condition mode, the same accelerator opening degree, the same vehicle speed, the minimum tire rolling resistance and the tire pressure of the tire under the condition that the wheels do not slip through an experimental method.

4. The method of claim 3, wherein the experimental approach in the case of the driving mode being the full vehicle economy mode is a coasting experimental approach, and the experimental approach in the case of the driving mode being the full vehicle power mode is a bench experimental approach.

5. The method according to any one of claims 2 to 4, wherein said controlling the tire pressure of the tire using the target tire pressure comprises:

and controlling the tire pressure of the tire by utilizing the product of the target tire pressure and a preset tire pressure safety factor.

6. A tire pressure control device characterized by comprising:

the system comprises an acquisition module, a driving module and a driving module, wherein the acquisition module is used for acquiring a current road condition mode, a current driving mode, a current accelerator opening and a current vehicle speed, the road condition mode comprises a road mode, an off-road mode and a soft mode, and the driving mode comprises a whole vehicle economy mode and a whole vehicle power mode;

and the control module is used for controlling the tire pressure of the tire based on the current road condition mode, the current driving mode, the current accelerator opening and the current vehicle speed.

7. The apparatus of claim 6, wherein the control module is configured to:

determining the current road condition mode, the current driving mode, the current accelerator opening and the corresponding target tire pressure under the current vehicle speed condition by using a preset corresponding table or a preset functional relation;

controlling the tire pressure of the tire using the target tire pressure.

8. The apparatus of claim 7,

under the condition that the driving mode is the whole vehicle economic mode, the preset corresponding table or the preset function relationship is a corresponding table or a function relationship obtained by determining the corresponding relationship of the same road condition mode, the same vehicle speed, the minimum tire rolling resistance and the tire pressure through an experimental method;

and under the condition that the driving mode is the whole vehicle power mode, the preset corresponding table or the preset function relationship is a corresponding table or a function relationship obtained by determining the corresponding relationship of the same road condition mode, the same accelerator opening degree, the same vehicle speed, the minimum tire rolling resistance and the tire pressure of the tire under the condition that the wheels do not slip through an experimental method.

9. The apparatus of claim 7 or 8, wherein the control module is further configured to:

and controlling the tire pressure of the tire by utilizing the product of the target tire pressure and a preset tire pressure safety factor.

10. A vehicle characterized by comprising the tire air pressure control apparatus according to any one of claims 6 to 9.

Technical Field

The disclosure relates to the field of vehicles, in particular to a tire pressure control method and device and a vehicle.

Background

At present, a tire pressure control technology for a tire does not exist, and the trafficability, the dynamic property and the economical efficiency of a whole vehicle can be well met.

Disclosure of Invention

The invention aims to provide a tire pressure control method, a tire pressure control device and a vehicle, which can meet the trafficability and the dynamic property of the whole vehicle and improve the economy of the whole vehicle.

According to a first embodiment of the present disclosure, there is provided a tire-pressure control method including: the method comprises the steps of obtaining a current road condition mode, a current driving mode, a current accelerator opening and a current vehicle speed, wherein the road condition mode comprises a road mode, an off-road mode and a soft mode, and the driving mode comprises a whole vehicle economy mode and a whole vehicle power mode; and controlling the tire pressure of the tire based on the current road condition mode, the current driving mode, the current accelerator opening and the current vehicle speed.

Optionally, the controlling the tire pressure of the tire based on the current road condition mode, the current driving mode, the current accelerator opening degree and the current vehicle speed includes: determining the current road condition mode, the current driving mode, the current accelerator opening and the corresponding target tire pressure under the current vehicle speed condition by using a preset corresponding table or a preset functional relation; controlling the tire pressure of the tire using the target tire pressure.

Optionally, in a case that the driving mode is the vehicle economy mode, the preset correspondence table or the preset function relationship is a correspondence table or a function relationship obtained by determining a correspondence relationship between a same road condition mode, a same vehicle speed, a minimum tire rolling resistance and a tire pressure through an experimental method; and under the condition that the driving mode is the whole vehicle power mode, the preset corresponding table or the preset function relationship is a corresponding table or a function relationship obtained by determining the corresponding relationship of the same road condition mode, the same accelerator opening degree, the same vehicle speed, the minimum tire rolling resistance and the tire pressure of the tire under the condition that the wheels do not slip through an experimental method.

Optionally, the experimental method in the case that the driving mode is the entire vehicle economy mode is a coasting experimental method, and the experimental method in the case that the driving mode is the entire vehicle power mode is a bench experimental method.

Optionally, the controlling the tire pressure of the tire using the target tire pressure includes: and controlling the tire pressure of the tire by utilizing the product of the target tire pressure and a preset tire pressure safety factor.

According to a second embodiment of the present disclosure, there is provided a tire pressure control device including: the system comprises an acquisition module, a driving module and a driving module, wherein the acquisition module is used for acquiring a current road condition mode, a current driving mode, a current accelerator opening and a current vehicle speed, the road condition mode comprises a road mode, an off-road mode and a soft mode, and the driving mode comprises a whole vehicle economy mode and a whole vehicle power mode; and the control module is used for controlling the tire pressure of the tire based on the current road condition mode, the current driving mode, the current accelerator opening and the current vehicle speed.

Optionally, the control module is configured to: determining the current road condition mode, the current driving mode, the current accelerator opening and the corresponding target tire pressure under the current vehicle speed condition by using a preset corresponding table or a preset functional relation; controlling the tire pressure of the tire using the target tire pressure.

Optionally, in a case that the driving mode is the vehicle economy mode, the preset correspondence table or the preset function relationship is a correspondence table or a function relationship obtained by determining a correspondence relationship between a same road condition mode, a same vehicle speed, a minimum tire rolling resistance and a tire pressure through an experimental method; and under the condition that the driving mode is the whole vehicle power mode, the preset corresponding table or the preset function relationship is a corresponding table or a function relationship obtained by determining the corresponding relationship of the same road condition mode, the same accelerator opening degree, the same vehicle speed, the minimum tire rolling resistance and the tire pressure of the tire under the condition that the wheels do not slip through an experimental method.

Optionally, the control module is further configured to: and controlling the tire pressure of the tire by utilizing the product of the target tire pressure and a preset tire pressure safety factor.

According to a third embodiment of the present disclosure, there is provided a vehicle including the tire air pressure control device according to the second embodiment of the present disclosure.

By adopting the technical scheme, the factors such as the current road condition mode, the current driving mode, the current accelerator opening degree and the current vehicle speed are considered when the tire pressure of the tire is controlled, so that different requirements of the power mode and the economic mode of the whole vehicle on the characteristics of the tire are fully considered, the power performance and the trafficability characteristic of the whole vehicle are improved by adjusting the tire pressure of the tire to a proper range to maximally utilize the ground adhesion condition, and the economy of the whole vehicle is improved by adjusting the tire pressure of the tire to a proper range to reduce the oil consumption and the abrasion state of the tire.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a flowchart of a tire air pressure control method according to an embodiment of the present disclosure.

Fig. 2 is a schematic block diagram of a tire air pressure control device according to an embodiment of the present disclosure.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

Fig. 1 is a flowchart of a tire air pressure control method according to an embodiment of the present disclosure. As shown in fig. 1, the method includes the following steps S11 and S12.

In step S11, a current road condition mode, a current driving mode, a current accelerator opening, and a current vehicle speed are obtained, where the road condition mode includes a highway mode, an off-road mode, and a soft mode, and the driving mode includes a whole vehicle economy mode and a whole vehicle power mode.

The highway mode refers to a road condition mainly including a hard asphalt or cement road surface. The cross-country mode mainly includes the road conditions of simple roads such as fields, gobi, deserts and the like. The limp mode refers to road conditions mainly including sand, snow, and muddy road.

In step S12, the tire pressure of the tire is controlled based on the current road condition mode, the current driving mode, the current accelerator opening degree, and the current vehicle speed.

Wherein the control of the tire pressure may be achieved by controlling tire inflation, deflation, etc. Inflation, deflation, etc. of the tires may be achieved by controlling the opening and closing of the various control valves.

By adopting the technical scheme, the factors such as the current road condition mode, the current driving mode, the current accelerator opening degree and the current vehicle speed are considered when the tire pressure of the tire is controlled, so that different requirements of the power mode and the economic mode of the whole vehicle on the characteristics of the tire are fully considered, the power performance and the trafficability characteristic of the whole vehicle are improved by adjusting the tire pressure of the tire to a proper range to maximally utilize the ground adhesion condition, and the economy of the whole vehicle is improved by adjusting the tire pressure of the tire to a proper range to reduce the oil consumption and the abrasion state of the tire.

In one embodiment, the step S12 of controlling the tire pressure of the tire based on the current road condition mode, the current driving mode, the current accelerator opening degree and the current vehicle speed includes: determining the tire pressure of a target tire corresponding to the current road condition mode, the current driving mode, the current accelerator opening and the current vehicle speed by using a preset corresponding table or a preset functional relation; the tire pressure of the tire is controlled using the target tire pressure. The preset mapping table or the preset function relation is a mapping table or a function relation obtained by determining the mapping relation of the same road condition mode, the same vehicle speed, the minimum tire rolling resistance and the tire pressure of the tire through an experimental method under the condition that the driving mode is the vehicle economy mode; and under the condition that the driving mode is the whole vehicle power mode, the preset corresponding table or the preset function relationship is the corresponding table or the function relationship obtained by determining the corresponding relationship of the same road condition mode, the same accelerator opening degree, the same vehicle speed, the minimum tire rolling resistance and the tire pressure of the tire under the condition that the wheels do not slip through an experimental method. Thus, the tire pressure of the tire can be controlled simply and quickly.

In addition, considering that the larger the tire pressure of the tire is, the lower the rolling resistance of the tire is, but the tire burst safety risk exists, a preset tire pressure safety factor k can be set according to the tire characteristics, and the tire pressure of the tire can be controlled by utilizing the product of the target tire pressure obtained by presetting a corresponding table or a preset functional relation and the preset tire pressure safety factor k. Therefore, the safety of the whole vehicle can be ensured, and the risk of tire burst is avoided.

The following describes how to obtain the preset mapping table or the preset functional relationship by taking the road condition mode as the road mode as an example. The preset correspondence table may be a correspondence table composed of data obtained in the manner described below, and the preset functional relationship may be obtained by fitting the data obtained in the manner described below.

For the case that the driving mode is the whole vehicle economy mode, the corresponding relation between the tire pressure and the rolling resistance of the tire can be measured by a sliding experiment method. For example, table 1 shows a correspondence table between vehicle speed and tire rolling resistance in the case where the tire air pressure is a1 Kpa.

Vehicle speed km/h	0	10	20	30	40	……	120	130	140
										Rolling resistance N	X1	X2	X3	X4	X5	……	X13	X14	X15

TABLE 1

Testing the rolling resistance of the tires corresponding to different vehicle speeds under the conditions that the tire pressures of the tires are a1, a2, a3, … … and an Kpa respectively; then, under the condition of the same vehicle speed, the tire pressure corresponding to the minimum tire rolling resistance is selected as the initial target tire pressure corresponding to the vehicle speed, so that the target tire pressures corresponding to different vehicle speeds can be obtained under the highway mode and when the driving mode is the whole vehicle economy mode. The target tire pressure determined in this way can reduce the tire rolling resistance, so that better overall vehicle economy can be achieved. For example, table 2 shows a table of the correspondence between the vehicle speed and the target tire pressure when the driving mode is the full vehicle economy mode in the highway mode.

Vehicle speed km/h	0	10	20	30	40	……	120	130	140
										Target tire pressure Kpa	ax1	ax2	ax3	ax4	ax5	……	ax13	ax14	ax15

TABLE 2

For the case where the driving mode is the entire vehicle power mode, the correspondence relationship between the tire pressure and the tire rolling resistance when the wheel does not slip can be measured by the bench test method. Because the tire adhesion coefficient is relatively large in correlation with the tire rolling resistance, the vehicle speed, the tire deformation and the like, and the tire deformation is positively correlated with the wheel end torque, the target tire pressure in the whole vehicle power mode is selected according to the vehicle speed and the accelerator opening. For example, table 3 shows the correspondence among the accelerator opening, the vehicle speed, and the tire rolling resistance in the case where the tire air pressure is b1 Kpa.

TABLE 3

Testing the rolling resistance of the tires corresponding to different vehicle speeds under the condition that the wheels do not slip under the conditions that the tire pressures of the tires are b1, b2, b3, … … and bn Kpa respectively; then, under the condition of the same vehicle speed and the same accelerator opening, the tire pressure corresponding to the minimum tire rolling resistance is selected as the initial target tire pressure corresponding to the vehicle speed and the accelerator opening, so that the target tire pressures corresponding to different vehicle speeds and different accelerator openings can be obtained under the highway mode and when the driving mode is the whole vehicle power mode. The target tire pressure determined in such a way can ensure that the rolling resistance of the tire is minimum on the premise that the wheel end of the whole vehicle provides the maximum driving force and the tire provides larger adhesive force, so that the economical efficiency of the whole vehicle can be ensured while the dynamic performance and the trafficability of the whole vehicle are improved.

Fig. 2 is a schematic block diagram of a tire air pressure control device according to an embodiment of the present disclosure. As shown in fig. 2, the apparatus includes: the acquiring module 21 is configured to acquire a current road condition mode, a current driving mode, a current accelerator opening and a current vehicle speed, where the road condition mode includes a road mode, an off-road mode and a soft mode, and the driving mode includes a whole vehicle economy mode and a whole vehicle power mode; and the control module 22 is used for controlling the tire pressure of the tire based on the current road condition mode, the current driving mode, the current accelerator opening and the current vehicle speed.

By adopting the technical scheme, the factors such as the current road condition mode, the current driving mode, the current accelerator opening degree and the current vehicle speed are considered when the tire pressure of the tire is controlled, so that different requirements of the power mode and the economic mode of the whole vehicle on the characteristics of the tire are fully considered, the power performance and the trafficability characteristic of the whole vehicle are improved by adjusting the tire pressure of the tire to a proper range to maximally utilize the ground adhesion condition, and the economy of the whole vehicle is improved by adjusting the tire pressure of the tire to a proper range to reduce the oil consumption and the abrasion state of the tire.

Optionally, the control module 22 is configured to: determining the tire pressure of a target tire corresponding to the current road condition mode, the current driving mode, the current accelerator opening and the current vehicle speed by using a preset corresponding table or a preset functional relation; the tire pressure of the tire is controlled using the target tire pressure.

Optionally, in a case that the driving mode is a vehicle economy mode, the preset correspondence table or the preset function relationship is a correspondence table or a function relationship obtained by determining a correspondence relationship between a same road condition mode, a same vehicle speed, a minimum tire rolling resistance and a tire pressure through an experimental method; and under the condition that the driving mode is the whole vehicle power mode, the preset corresponding table or the preset function relationship is the corresponding table or the function relationship obtained by determining the corresponding relationship of the same road condition mode, the same accelerator opening degree, the same vehicle speed, the minimum tire rolling resistance and the tire pressure of the tire under the condition that the wheels do not slip through an experimental method.

Optionally, the control module 22 is further configured to: and controlling the tire pressure of the tire by using the product of the target tire pressure and the preset tire pressure safety factor.

The control module 22 according to the embodiment of the present disclosure may be implemented by using a device such as a central processing unit, a field programmable gate array, a single chip, etc.

Specific implementations of various modules in the apparatus according to the embodiments of the present disclosure have been described in detail in the related methods, and are not described herein again.

According to still another embodiment of the present disclosure, there is provided a vehicle that may include the tire air pressure control device according to the embodiment of the present disclosure described above.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.