The present disclosure is related to hill descent control method and system of a vehicle

BACKGROUND
Hill descent control is an essential system in many current vehicles. Hill descent control provides necessary traction control to the vehicle when going downhill. Generally, the hill descent control applies brakes to the wheels of the vehicle to control the speed of the vehicle and makes sure that it is under control that evades any mishappening.
However, current hill descent control systems easily wear and tear the brake pads and also are only dependent on the condition of the brakes of the vehicle.
Therefore, an efficient hill descent system is required to solve the above-mentioned shortcomings.

SUMMARY OF THE INVENTION
In order to provide a solution for the above problem, the invention discloses a hill descent control system for an electric vehicle, including an electric motor, configured to power the electric vehicle, a hill descent determination module, configured to determine whether the electric vehicle is experiencing a hill descent; and a main controller, communicably connected to the hill descent module to receive the hill descent determination and performs the steps of, determination of a speed of the motor while in hill descent, reversing a polarity of the electric motor, in case the speed is above a predetermined upper threshold speed value, and stalling the reversing of the polarity, in case the speed of the electric motor is below a lower threshold speed value.
According to yet another embodiment of the invention, the invention discloses a hill descent control method for an electric vehicle, that includes the steps of, determining, by a hill descent determination module, whether the electric vehicle is experiencing a hill descent, determining, by a main controller, whether a hill descent mode is selected, determining, by the main controller, a speed of the electric motor while experiencing the hill descent, reversing, by the main controller, a polarity of the electric motor if the speed of the electric motor is above a predetermined upper threshold speed value, and stalling, by the electric motor, the reversing of the polarity, in case the speed of the electric motor is below a lower threshold speed value.
BRIEF DESCRIPTION OF THE DRAWINGS
[0002] The accompanying drawings illustrate various embodiments of systems, methods, and embodiments of various other aspects of the disclosure. Any person with ordinary skills in the art will appreciate that the illustrated element boundaries (e.g. boxes, groups of boxes, or other shapes) in the figures represent one example of the boundaries. It may be that in some examples one element may be designed as multiple elements or that multiple elements may be designed as one element. In some examples, an element shown as an internal component of one element may be implemented as an external component in another, and vice versa. Furthermore, elements may not be drawn to scale. Non-limiting and non-exhaustive descriptions are described with reference to the following drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating principles.
[0003] Fig. 1 illustrates a system 100 for a hill descent control of a vehicle, according to an embodiment of the invention;
[0004] Fig. 2 illustrates a method 200 for a hill descent control of a vehicle, according to an embodiment of the invention.
DETAILED DESCRIPTION
[0005] Embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings in which like numerals represent like elements throughout the several figures, and in which example embodiments are shown. Embodiments of the claims may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The examples set forth herein are non-limiting examples and are merely examples among other possible examples.
[0006] Some embodiments of this invention, illustrating all its features, will now be discussed in detail. The words “comprising,” “having,” “containing,” and “including,” and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items.
[0007] It must also be noted that as used herein and in the appended claims, the singular forms “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise. Although any systems and methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present invention, the preferred, systems and methods are now described.
[0008] FIG. 1 illustrates a system 100 for a hill descent control of a vehicle, in accordance with an embodiment of the invention. The system 100 includes a main controller 102, a hill descent determination module 104, and an electric motor 106.
[0009] The hill descent determination module 104 is configured to determine whether the vehicle is experiencing a hill descent or not. according to an embodiment of the invention, the hill descent module may be a gyroscope, a camera, a RADAR, a LiDAR or any other suitable angle determination device. Also, the hill descent initiation may also be determined as increase in rpm without throttle input. The controller 102 is configured to control the operation of the motor 106.
[0010] In operation, if the hill descent control module 104 determines that the vehicle is experiencing a descent, it sends a signal to the control module 102. The control module 102 checks for the rotations/minute, or power of the motor through speed generated. In case, the speed of the vehicle increases above predetermined upper threshold, the controller provides a reverse polarity to the motor 106. The reverse polarity is provided to a rotor of the motor 106 in order to decelerate the motor 106. The reverse polarity decreases the speed of the vehicle. However, the control module 102 continuously checks for the reverse polarity provided. In case the speed of the motor 106 reduces below a predetermined lower threshold, the control module 102 stops the reverse polarity and provides normal polarity (if required) to the motor 106 of the vehicle. In this manner the control module 102 maintains a constant decreased speed within a certain speed range.
[0011] Now referring to Fig. 2, illustrating a flow chart depicting a method 200, for a hill descent control of a vehicle, according to an embodiment of the invention. At block 202, the control module 102 sends a continuous signal to the hill descent module 104 to determine whether the vehicle is undergoing a descent. At block, 204, it determines whether the vehicle is undergoing a descent. In case there is no hill descent being experienced by the vehicle, the method goes back to block 202.
[0012] However, in case, the vehicle is experiencing a hill descent, then at step 206 the control module 102 checks the rotations/minute or speed of the motor 106. At block 208, the control module 102 determines whether the speed or the motor rotations are above a predetermined upper threshold limit. In case, the speed or the motor rotations are below the upper threshold, then the method 200 returns block 206. However, in case the speed or the motor rotations are above the upper threshold limit, then at step 210, the control module 102 reverses polarity of the motor 106 to reduce the speed. At block 212, the control module 102 determines, whether the speed or the motor rotations are below a lower threshold limit. If not, then the method 200, returns to block 210. However, if the speed or the motor rotations are below the lower threshold limit, then at block 214, the control module stops providing reverse polarity to the motor 106 in order to maintain the vehicle speed within a constant range.
[0013] Moreover, although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the invention as defined by the appended claims. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one will readily appreciate from the disclosure, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.

,CLAIMS:We claim:
1. A hill descent control system for an electric vehicle, comprising:
An electric motor, configured to power the electric vehicle;
A hill descent determination module, configured to determine whether the electric vehicle is experiencing a hill descent; and
A main controller, communicably connected to the hill descent module to receive the hill descent determination and performs the steps of:
Determination of a speed of the motor while in hill descent;
Reversing a polarity of the electric motor, in case the speed is above a predetermined upper threshold speed value; and
Stalling the reversing of the polarity, in case the speed of the electric motor is below a lower threshold speed value.
2. The system of claim 1, wherein the hill descent determination module is anyone or a combination of a gyroscope, a camera, a RADAR, and a LiDAR.
3. Th system of claim 2, wherein the hill descent determination module relates the hill descent with a GPS sensor.
4. The system of claim 3, wherein the GPS sensor provides information about longevity of the hill descent.
5. The system of claim 4, wherein the longevity of the hill descent serves as a kick in value for activation of the hill descent determination module.
6. A hill descent control method for an electric vehicle, comprising;
Determining, by a hill descent determination module, whether the electric vehicle is experiencing a hill descent;
Determining, by a main controller, whether a hill descent mode is selected;
Determining, by the main controller, a speed of the electric motor while experiencing the hill descent;
Reversing, by the main controller, a polarity of the electric motor if the speed of the electric motor is above a predetermined upper threshold speed value; and
Stalling, by the electric motor, the reversing of the polarity, in case the speed of the electric motor is below a lower threshold speed value.
7. The method of claim 6 further comprising checking, by the main controller, continuously the reverse polarity provided to the electric motor.
8. The method of claim 6, wherein the hill descent determination module is anyone or a combination of a gyroscope, a camera, a RADAR, and a LiDAR.
9. The method of claim 1, wherein the hill descent determination module relates the hill descent with a GPS sensor.
10. The method of claim 9, wherein the GPS sensor provides information about longevity of the hill descent.
11. The method of claim 10, wherein the longevity of the hill descent serves as a kick in value for activation of the hill descent determination module.