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KR-102962096-B1 - CONTROL SYSTEM FOR COASTING TORQUE DURING INERTIA DRIVING IN TURNING SECTION AND METHOD THEREOF

KR102962096B1KR 102962096 B1KR102962096 B1KR 102962096B1KR-102962096-B1

Abstract

A coasting torque control system for inertial driving in a turning section according to one embodiment of the present invention may include a sensor unit for detecting the state of a vehicle, a road information transmission unit for providing road information in front of the vehicle, a vehicle recognition unit for recognizing the presence or absence of a preceding vehicle in front of the vehicle, and a vehicle control unit that, when the vehicle enters a turning section, sets a target vehicle speed based on the presence or absence of the preceding vehicle and performs coasting torque control at the target vehicle speed.

Inventors

  • 박아람
  • 김창유
  • 유승재

Assignees

  • 현대자동차주식회사
  • 기아 주식회사

Dates

Publication Date
20260511
Application Date
20200622

Claims (17)

  1. Sensor unit for detecting the condition of the vehicle; A road information transmission unit that provides road information in front of the vehicle; A vehicle recognition unit that recognizes whether there is a preceding vehicle in front of the vehicle; and A vehicle control unit that, when the vehicle enters a turning section, sets a target vehicle speed based on the presence or absence of the preceding vehicle and enables coasting torque control to be performed at the target vehicle speed; The above vehicle control unit is, (i) When the vehicle enters a turning section while the preceding vehicle is recognized, The vehicle speed of the aforementioned preceding vehicle is determined to be a standard speed capable of passing through the aforementioned turning section, and Compared with the preset optimal vehicle speed according to the heading angle of the above turning section, Coasting torque control is performed at a vehicle speed corresponding to the minimum value between the above reference speed and the above optimal vehicle speed, and (ii) When the vehicle enters a turning section while the preceding vehicle is recognized, and the preceding vehicle moves out of the recognizable distance, The last vehicle speed of the aforementioned preceding vehicle is determined as the moving speed of the aforementioned preceding vehicle, and Compared with the preset optimal vehicle speed according to the heading angle of the above turning section, Coasting torque control is performed at a vehicle speed corresponding to the minimum value between the above-mentioned progress speed and the above-mentioned optimal vehicle speed, and (iii) When the vehicle enters a turning section while the preceding vehicle is not recognized, A coasting torque control system for inertial driving in a turning section, characterized by enabling coasting torque control to be performed at a preset optimal vehicle speed according to the heading angle of the turning section.
  2. In claim 1, The sensor unit above is, A coasting torque control system for inertial driving in a turning section, characterized by including a device capable of determining the driving operation state of the vehicle driver, a device capable of determining the vehicle speed, or a device capable of determining road gradient information.
  3. In claim 1, The above road information transmission unit is, A coasting torque control system for inertial driving in a turning section, characterized by providing information on the curvature of the road ahead where the vehicle is traveling, the heading angle of the vehicle, or the direction of travel of the vehicle.
  4. In claim 1, The above vehicle recognition unit is, A coasting torque control system for inertial driving in a turning section, characterized by measuring the relative speed between the vehicle and the preceding vehicle when a preceding vehicle is present.
  5. In claim 1, The above vehicle control unit is, A vehicle speed calculation unit that determines the speed of the preceding vehicle using the speed of the vehicle and the relative speed between the vehicle and the preceding vehicle; A road environment judgment unit that determines whether the road ahead on which the vehicle is traveling is straight or curved using the above road information; and A driving torque generating unit that generates coasting torque control at the above target vehicle speed and provides it to the driving device of the vehicle. A coasting torque control system for inertial driving in a turning section, characterized by including
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  9. When a vehicle equipped with a sensor unit for detecting the state of the vehicle, a road information transmission unit for providing road information ahead, and a vehicle recognition unit for recognizing the presence or absence of a preceding vehicle ahead enters a turning section, a vehicle speed setting step in which a vehicle control unit sets a target vehicle speed based on the presence or absence of the preceding vehicle; and A torque control step for performing coasting torque control at the above target vehicle speed; is included, The above vehicle speed setting step is, (i) When the vehicle enters a turning section while the preceding vehicle is recognized, A step of determining the vehicle speed of the preceding vehicle as a reference speed capable of passing through the turning section; A step of comparing with a preset optimal vehicle speed according to the heading angle of the above turning section; and It includes a step of performing coasting torque control at a vehicle speed corresponding to the minimum value between the reference speed and the optimal vehicle speed, and (ii) When the vehicle enters a turning section while the preceding vehicle is recognized, and the preceding vehicle moves out of the recognizable distance, A step of determining the last vehicle speed of the preceding vehicle as the moving speed of the preceding vehicle; A step of comparing with a preset optimal vehicle speed according to the heading angle of the above turning section; and It includes a step of performing coasting torque control at a vehicle speed corresponding to the minimum value between the above-mentioned progress speed and the above-mentioned optimal vehicle speed, and (iii) When the vehicle enters a turning section while the preceding vehicle is not recognized, A method for controlling coasting torque during inertial driving in a turning section, characterized by including a step of performing coasting torque control at a preset optimal vehicle speed according to the heading angle of the turning section.
  10. In claim 9, The above vehicle speed setting step is, A method for controlling coasting torque during inertial driving in a turning section, characterized by including the step of determining the driving operation state of the vehicle driver through the sensor unit, the step of determining the vehicle speed or the step of determining road gradient information.
  11. In claim 9, The above vehicle speed setting step is, A method for controlling coasting torque during inertial driving in a turning section, characterized by including the step of receiving information on the curvature of the road ahead where the vehicle is traveling, the heading angle of the vehicle, or the direction of travel of the vehicle through the road information transmission unit.
  12. In claim 9, The above vehicle speed setting step is, A method for controlling coasting torque during inertial driving in a turning section, characterized by including the step of measuring the relative speed between the vehicle and the preceding vehicle through the vehicle recognition unit when the preceding vehicle is present.
  13. In claim 9, The above vehicle speed setting step is, Through the above vehicle control unit, A step of determining the speed of the preceding vehicle using the speed of the vehicle and the relative speed between the vehicle and the preceding vehicle; A step of determining whether the road ahead on which the vehicle is traveling is straight or curved using the above road information; and A step of generating coasting torque at the above target vehicle speed and providing it to the vehicle's drive unit. A method for controlling coasting torque during inertial driving in a turning section, characterized by including
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  17. A computer-readable recording medium having a program recorded thereon for executing a coasting torque control method during inertial driving in a turning section of any one of claims 9 to 13.

Description

Control System for Coasting Torque During Inertial Driving in Turning Section and Method Thereof The present invention relates to a coasting torque control system and method for coasting in a turning section, and more specifically, to a coasting torque control system and method for coasting in a turning section that improves a fixed control method through the driver's Paddle Shift input value in a turning section, and enables the deceleration of a vehicle during coasting by referring to the gradient (uphill/downhill), curvature of the turning road, and speed of the vehicle ahead along with the driver's manual Paddle Shift input. Braking in vehicles containing a drive motor and an electric energy storage device includes hydraulic braking and regenerative braking by a motor. Recently, paddle shifters that allow manual setting of the regenerative level for efficient regenerative braking have been applied to vehicles, and during coasting, the driver can control the deceleration caused by regenerative braking by adjusting the desired regenerative level through the [+] or [-] input of the paddle shifters. It shows the difference in regenerative torque according to the 4 regenerative stages (D0, D1, D2, D3) set by the paddle shift. However, if the regenerative braking level is controlled solely by the driver's manual operation, it causes inconvenience as the driver must frequently perform paddle shift inputs, acceleration, and braking actions depending on driving conditions such as changes in road gradient. Consequently, there was a problem in that regenerative braking could not be performed efficiently, making it impossible to achieve the expected improvement in fuel efficiency. FIG. 1 is a block diagram showing a coasting torque control system during inertial driving in a turning section according to one embodiment of the present invention. FIG. 2 is a graph showing the maximum vehicle speed according to curvature in a coasting torque control system during inertial driving in a turning section according to one embodiment of the present invention. FIGS. 3 to 5 are drawings illustrating an example of using a coasting torque control system during inertial driving in a turning section according to an embodiment of the present invention. FIG. 6 is a flowchart illustrating a method for controlling coasting torque during inertial driving in a turning section according to an embodiment of the present invention. Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted. In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5. FIG. 1 is a block diagram showing a coasting torque control system during inertial driving in a turning section according to an embodiment of the present invention, FIG. 2 is a graph showing the maximum vehicle speed according to curvature in a coasting torque control system during inertial driving in a turning section according to an embodiment of the present invention, and FIG. 3 to 5 are drawings showing an example of using a coasting torque control system during inertial driving in a turning section according to an embodiment of the present invention. Referring to FIG. 1, a coasting torque control system for inertial driving in a turning section according to one embodiment of the present invention may be configured to include a vehicle recognition unit (110), a road information transmission unit (130), a sensor unit (150), and a vehicle control unit (170). The sensor unit (150) is capable of detecting the state of the vehicle (100) and may include a device capable of determining the driving operation state of the vehi