阅读说明：本技术 基于起步场景的动力控制方法、系统、车辆及存储介质 (Power control method and system based on starting scene, vehicle and storage medium ) 是由 姜震 田云 黄�俊 王文飞 于 2021-05-24 设计创作，主要内容包括：本发明公开了一种基于起步场景的动力控制方法、系统、车辆及存储介质,包括：S1.判断车辆是否满足起步状态,若满足起步状态,进入S2,否则继续执行S1；S2.计算车辆所在位置的坡度R,并判断坡度R是否小于设定坡度值R1,若是,则进入S3,若否,进入S5；S3.计算车辆与前方障碍物的距离D,并判断距离D是否小于设定距离值D1,若是,则进入S4,若否,进入S5；S4.判断距离D是否大于设定距离值D2,若是,则进入S7,若否,进入S6；S5.车辆执行运动模式,并进入S7；S6.车辆执行经济模式,并进入S7；S7.保持当前模式。本发明能够实现对不同起步场景的精确识别,并自动切换相应场景的动力模式。(The invention discloses a power control method, a system, a vehicle and a storage medium based on a starting scene, comprising the following steps: s1, judging whether the vehicle meets a starting state, if so, entering S2, and if not, continuing to execute S1; s2, calculating the gradient R of the position of the vehicle, and judging whether the gradient R is smaller than a set gradient value R1, if so, entering S3, otherwise, entering S5; s3, calculating the distance D between the vehicle and the front obstacle, and judging whether the distance D is smaller than a set distance value D1, if so, entering S4, otherwise, entering S5; s4, judging whether the distance D is larger than a set distance value D2, if so, entering S7, and if not, entering S6; s5, the vehicle executes a motion mode and enters S7; s6, the vehicle executes the economic mode and enters S7; and S7, keeping the current mode. The invention can realize the accurate identification of different starting scenes and automatically switch the power modes of the corresponding scenes.)

1. A power control method based on a starting scene is characterized in that: the method comprises the following steps:

s1, judging whether the vehicle meets a starting state, if so, entering a step S2, otherwise, continuing to execute the step S1;

s2, calculating the slope R of the position of the vehicle, judging whether the slope R is smaller than a set slope value R1, if so, entering a step S3, otherwise, considering that the current scene of the vehicle is a hill starting scene, and entering a step S5;

s3, calculating the distance D between the vehicle and the front obstacle, judging whether the distance D is smaller than a set distance value D1, if so, entering a step S4, otherwise, considering that the current vehicle is in a smooth starting scene, and entering a step S5;

s4, judging whether the distance D is larger than a set distance value D2, if so, entering a step S7, if not, regarding the current vehicle scene as a vehicle jam starting scene, and entering a step S6;

s5, the vehicle executes a motion mode and goes to step S7;

s6, the vehicle executes the economic mode and enters the step S7;

and S7, keeping the current mode, and after detecting that the vehicle speed Vs is greater than the set vehicle speed value V1 or the target gear Gt is the 2-gear, keeping the exit state, and ending the starting control.

2. The startup scenario-based power control method according to claim 1, characterized in that: the step S1 specifically includes:

acquiring a gear shifting position St, an accelerator opening Ap, a vehicle speed Vs and a brake state Br;

and when the gear shifting position St is in a D gear or an N gear, the accelerator opening Ap is zero, the vehicle speed Vs is zero, and the brake state Br is ON, judging that the starting state is met, otherwise, judging that the starting state is not met.

3. A power control system based on a starting scene comprises a memory and a controller, and is characterized in that: the memory has stored therein a computer readable program that when invoked by the controller is capable of performing the steps of the startup scenario based power control method of claim 1 or 2.

4. A vehicle, characterized in that: a launch scenario based power control system as claimed in claim 3 is employed.

5. A storage medium, characterized by: stored with a computer readable program which, when invoked, is able to perform the steps of the startup scenario based power control method according to claim 1 or 2.

Technical Field

The invention belongs to the technical field of vehicle control, and particularly relates to a power control method and system based on a starting scene, a vehicle and a storage medium.

Background

Intellectualization is an important trend of automobile revolution, and the demand of consumers for differentiation of power output control is increasing day by day. The power requirements of the user for the vehicle vary under different usage scenarios. For example, when the vehicle starts at a traffic light intersection, when the vehicle is in a traffic jam working condition, the output expectation of the user to the power is low, the good controllability of the vehicle needs to be kept, and when the vehicle is in a smooth working condition or the vehicle is in an intersection head row position, the expectation of the user to the power output is high, and the user hopes to accelerate to the reasonable vehicle speed of the current road as soon as possible. In actual situations, users usually adapt to the requirements of different scenes through throttle operation, but the operation is an additional operation beyond the expectation of the users in most cases and cannot form a consistent experience for the vehicle. The actual power output does not match the user's scene requirements.

Therefore, it is necessary to develop a new power control method, system, vehicle and storage medium based on a start scene.

Disclosure of Invention

The invention aims to provide a starting scene-based power control method, a starting scene-based power control system, a vehicle and a storage medium, which can realize accurate identification of different starting scenes and automatically switch power modes of corresponding scenes.

In a first aspect, the invention provides a power control method based on a starting scene, comprising the following steps:

s1, judging whether the vehicle meets a starting state, if so, entering a step S2, otherwise, continuing to execute the step S1;

s2, calculating the slope R of the position of the vehicle, judging whether the slope R is smaller than a set slope value R1, if so, entering a step S3, otherwise, considering that the current scene of the vehicle is a hill starting scene, and entering a step S5;

s3, calculating the distance D between the vehicle and the front obstacle, judging whether the distance D is smaller than a set distance value D1, if so, entering a step S4, otherwise, considering that the current vehicle is in a smooth starting scene, and entering a step S5;

s4, judging whether the distance D is larger than a set distance value D2, if so, entering a step S7, if not, regarding the current vehicle scene as a vehicle jam starting scene, and entering a step S6;

s5, the vehicle executes a motion mode and goes to step S7;

s6, the vehicle executes the economic mode and enters the step S7;

and S7, keeping the current mode, and after detecting that the vehicle speed Vs is greater than the set vehicle speed value V1 or the target gear Gt is the 2-gear, keeping the exit state, and ending the starting control.

Optionally, the step S1 specifically includes:

acquiring a gear shifting position St, an accelerator opening Ap, a vehicle speed Vs and a brake state Br;

and when the gear shifting position St is in a D gear or an N gear, the accelerator opening Ap is zero, the vehicle speed Vs is zero, and the brake state Br is ON, judging that the starting state is met, otherwise, judging that the starting state is not met.

In a second aspect, the power control system based on a starting scene includes a memory and a controller, where the memory stores a computer readable program, and the controller can execute the steps of the power control method based on a starting scene when calling the computer readable program.

In a third aspect, the invention provides a vehicle, which adopts the power control system based on the starting scene.

In a fourth aspect, the present invention provides a storage medium having a computer readable program stored therein, where the computer readable program is capable of executing the steps of the power control method based on a start scene according to the present invention when the computer readable program is called.

The invention has the following advantages: when the vehicle is in a starting state, the acceleration sensor and the radar signals are fully utilized to more accurately identify a starting scene, and the power modes of the corresponding scenes are automatically switched, so that the requirements of users on different use scenes are met, and the driving pleasure is improved. The method is simple, has no hardware cost, and can realize the function only by changing the control logic of the power assembly.

Drawings

FIG. 1 is a logic flow diagram of the present embodiment;

FIG. 2 is a diagram illustrating the effect of each mode in this embodiment;

FIG. 3 is a schematic diagram of the torque characteristics of the engine in the economy mode of the present embodiment;

FIG. 4 is a schematic diagram of the engine torque characteristics in the power mode of the present embodiment;

FIG. 5 is a schematic view of a clear launch scenario in the present embodiment;

fig. 6 is a schematic diagram of a traffic jam starting scene in the present embodiment;

fig. 7 is a schematic diagram of a hill start scene in the present embodiment.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1, a power control method based on a starting scene includes the following steps:

s1, a controller acquires a gear shifting position St, an accelerator opening Ap, a vehicle speed Vs and a brake state Br, and judges whether a vehicle is in a starting state or not based on the gear shifting position St, the accelerator opening Ap, the vehicle speed Vs and the brake state Br, wherein the method specifically comprises the following steps:

and when the gear shifting position St is in a D gear or an N gear, the accelerator opening Ap is zero, the vehicle speed Vs is zero, and the brake state Br signal is ON, judging that the vehicle is in a starting state, and entering a step S2, otherwise, judging that the vehicle is not in the starting state, and continuing to execute the step S1.

And S2, calculating a gradient value R by the controller through a chassis acceleration signal carried by the whole vehicle, executing a step S3 when the calculated gradient value R is smaller than a set gradient value R1 (R1 is generally recommended to be 5%), namely further judging the starting road condition information, otherwise, identifying the starting road condition information as a hill starting scene, and entering the step S5.

In this embodiment, the calculation formula of the gradient value R is:

theta is the actual angle of the current ramp, the value of theta is relatively small in a general actual road, and sin theta is approximately equal to tan theta and is equal to R when theta is relatively small, so that the gradient value R can be roughly and accurately calculated through the acceleration of the vehicle, specifically the gradient value RWherein, σ is a vehicle rotating mass conversion coefficient and is a vehicle intrinsic parameter, g is a gravity acceleration, a1 is a vehicle flat road running acceleration, and a2 is a current actual acceleration of the vehicle. The actual gradient value of the calculation method is accurate because the vehicle is in a static state when starting.

S3, the controller calculates the distance D between the vehicle and the front obstacle through the radar signal, judges the current scene once again through distance identification, and when the distance D is larger than or equal to a set distance value D1, the front road is considered to be smooth or is positioned at the first vehicle position at the traffic light intersection, namely the current vehicle is positioned in a smooth starting scene, and the step S5 is executed. When the distance D is smaller than the set distance value D1, the process proceeds to step S4.

And S4, judging whether the distance D of the obstacle on the current side is larger than a set distance value D2, if the distance D is larger than a set distance value D2, entering a step S7 (the vehicle is at first in one of modes manually selected by a user and in one of a normal mode, a motion mode and an economy mode), if not, determining that the scene where the current vehicle is located is a traffic jam starting scene (namely, the current vehicle is considered to be congested on a road in front or the vehicle in front waits to start, and at the moment, the requirement of the user on power is economical and the vehicle speed is more controllable), and entering a step S6.

S5, control enters a power mode and the process goes to step S7.

S6, executing the economic mode and entering the step S7.

And S7, keeping the current mode unchanged. In this embodiment, after the controller completes scene recognition and controls to enter the corresponding mode, the current mode is maintained, and when the vehicle speed Vs is greater than the set vehicle speed value V1 or the target shift position Gt is the 2-shift position, the state is exited for maintaining, and the starting control process is ended. The set vehicle speed value V1 can be set according to different throttles, the set vehicle speed value V1 of a small throttle is smaller than that of a large throttle, but the whole set vehicle speed value is in a linear relation, the purpose of the step is to enable the whole starting process to be more continuously controllable, and meanwhile different acceleration expectations of users under different throttles are considered.

As shown in fig. 2 to 4, in this embodiment, in the power mode, the torque output is larger under the same throttle, and meanwhile, the torque keeps constant as the rotating speed increases, the acceleration experienced by the user is larger, and the vehicle speed continuously increases, while in the economy mode, the torque output value is smaller compared with the motion mode under the same throttle, and meanwhile, the torque goes to zero as the rotating speed drops, and at this time, the vehicle speed keeps balance as the rotating speed increases, and does not increase any more, so that the purpose of economy control is achieved.

In this embodiment, D1 is greater than D2, where D1 generally takes a value of 7 meters or more, the narrowest intersection of two lanes in a public road takes 7 meters, and D2 takes a value within 3 meters, but may be adjusted according to actual conditions.

In this embodiment, the starting scene is divided into a smooth starting scene (see fig. 5), a traffic jam starting scene (see fig. 6), and a hill starting scene (see fig. 7).