KR-20260066526-A - ELECTRIFIED VEHICLE AND CONTROL MEHTOD THEREOF

KR20260066526AKR 20260066526 AKR20260066526 AKR 20260066526AKR-20260066526-A

Abstract

The present invention relates to an electrified vehicle and a control method thereof, comprising: a launch mode determination unit that determines whether to perform a launch mode based on situation information ahead and a speed limit of the road ahead while the vehicle is stopped; an acceleration profile generation unit that generates an acceleration profile of the vehicle from a starting point for initiating acceleration in the launch mode to a ending point for reaching the speed limit, based on the maximum acceleration of the vehicle and the speed limit; and an acceleration control unit that determines an output torque for following the acceleration profile in the launch mode.

Inventors

조진겸
우동현

Assignees

현대자동차주식회사
기아 주식회사

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (14)

A launch mode determination unit that determines whether to perform a launch mode based on situation information ahead and the speed limit of the road ahead while the vehicle is stopped; An acceleration profile generating unit that generates an acceleration profile of the vehicle from a starting point at which acceleration of the launch mode begins based on the maximum acceleration of the vehicle and the vehicle speed limit, until a termination point at which the vehicle speed limit is reached; and An electric vehicle comprising an acceleration control unit for determining an output torque to follow the acceleration profile in the above-described oscillation mode.
In Article 1, The above oscillation mode determination unit is, An electric vehicle that determines that the launch mode can be performed if the acceleration distance according to the above situation information is greater than the preset distance and the above limited vehicle speed is greater than the preset vehicle speed.
In Article 2, The above situation information is, It includes at least one of forward traffic information received from the outside and forward obstacle information received through a sensor, and The above-mentioned preset distance and the above-mentioned preset vehicle speed are, An electrified vehicle configured by taking into account the minimum required distance and minimum vehicle speed required to reach a certain acceleration when accelerating from a standstill.
In Paragraph 3, The above acceleration profile is, The vehicle has a profile in which the acceleration of the vehicle increases from the start of the launch mode until the maximum acceleration is reached, and the acceleration of the vehicle decreases from the time the maximum acceleration is reached until the end of the launch mode is reached. An electrified vehicle in which the value integrated from the start of the above-mentioned oscillation mode to the end of the above-mentioned oscillation mode corresponds to the above-mentioned limited speed.
In Paragraph 4, The above acceleration profile generating unit is, An electrified vehicle that generates an acceleration profile such that the value obtained by integrating the vehicle speed according to the acceleration profile from the start of the acceleration mode to the end of the acceleration mode does not exceed the possible acceleration distance.
In Article 1, The above oscillation mode determination unit is, An electric vehicle that determines whether to perform the launch mode by further considering at least one of the normal status of the vehicle's system and the battery charge status of the vehicle.
In Article 1, An electric vehicle further comprising an input/output unit that outputs information indicating that the oscillation mode can be performed when the oscillation mode determination unit determines that the oscillation mode can be performed, and receives a user's request to perform the oscillation mode.
A step in which a launch mode determination unit determines whether to perform a launch mode based on situation information ahead and the speed limit of the road ahead while the vehicle is stopped; A step in which an acceleration profile generating unit generates an acceleration profile of the vehicle from a starting point at which acceleration in the launch mode begins based on the maximum acceleration of the vehicle and the limited vehicle speed, until a termination point at which the limited vehicle speed is reached; and A control method for an electric vehicle, comprising the step of an acceleration control unit determining an output torque for following the acceleration profile in the oscillation mode.
In Article 8, The step of determining the above oscillation mode is, A control method for an electric vehicle, wherein if the acceleration distance according to the above situation information is greater than the preset distance and the above limited vehicle speed is greater than the preset vehicle speed, it is determined that the above launch mode can be performed.
In Article 9, The above situation information is, It includes at least one of forward traffic information received from the outside and forward obstacle information received through a sensor, and The above-mentioned preset distance and the above-mentioned preset vehicle speed are, A control method for an electrified vehicle, set by considering the minimum required distance and minimum vehicle speed required to reach a certain acceleration when accelerating from a stationary state.
In Article 10, The above acceleration profile is, The vehicle has a profile in which the acceleration of the vehicle increases from the start of the launch mode until the maximum acceleration is reached, and the acceleration of the vehicle decreases from the time the maximum acceleration is reached until the end of the launch mode is reached. A control method for an electrified vehicle in which the value integrated from the start of the above-mentioned oscillation mode to the end of the above-mentioned oscillation mode corresponds to the above-mentioned limited vehicle speed.
In Article 11, The step of generating the above acceleration profile is, A control method for an electrified vehicle, wherein the value obtained by integrating the vehicle speed according to the above acceleration profile from the start of the above acceleration mode to the end of the above acceleration mode does not exceed the above acceleration possible distance.
In Article 8, In Article 1, The step of determining the above oscillation mode is, A control method for an electric vehicle that determines whether to perform the launch mode by further considering at least one of the normal status of the vehicle's system and the battery charge status of the vehicle.
In Article 8, A control method for an electric vehicle, further comprising the step of: when the input/output unit determines that the oscillation mode can be performed by the oscillation mode determination unit, outputting information indicating that the oscillation mode can be performed, and receiving a user's request to perform the oscillation mode.

Description

Electric Vehicle and Control Method Thereof The present invention relates to an electric vehicle equipped with an oscillation mode and a control method thereof. With the recent rise in environmental awareness, the demand for eco-friendly vehicles powered by electric motors is increasing. Eco-friendly vehicles are also known as electrified vehicles, and representative examples include hybrid electric vehicles (HEVs) and electric vehicles (EVs). Electrified vehicles exhibit superior initial acceleration performance compared to engine vehicles due to their constant torque characteristics, which allow them to output maximum torque until the motor reaches a certain rotational speed at which the back EMF becomes strong. While this acceleration performance can be maximized when starting from a standstill, there are instances where it is difficult to fully utilize this initial acceleration capability on public roads with speed limits. The matters described above as background technology are intended only to enhance understanding of the background of the present invention and should not be construed as an acknowledgment that they constitute prior art already known to those skilled in the art. FIG. 1 is a drawing for explaining an electric vehicle according to an embodiment of the present invention. FIG. 2 is a drawing for explaining a controller according to an embodiment of the present invention. FIGS. 3 and FIGS. 4 are drawings for explaining the starting mode of an electric vehicle according to an embodiment of the present invention. FIG. 5 illustrates an oscillation mode acceleration profile according to one embodiment of the present invention. FIG. 6 illustrates a vehicle speed graph corresponding to an acceleration profile according to one embodiment of the present invention. FIG. 7 illustrates an acceleration distance graph corresponding to an acceleration profile according to one embodiment of the present invention. FIG. 8 is a flowchart of the oscillation mode control process of a controller according to one embodiment of the present invention. FIGS. 9 to 11 show examples of oscillation mode outputs of an AVNT terminal according to an embodiment of the present invention. Specific structural or functional descriptions of the embodiments of the present invention disclosed in this specification or application are merely illustrative for the purpose of explaining embodiments according to the present invention, and embodiments according to the present invention may be implemented in various forms and should not be interpreted as being limited to the embodiments described in this specification or application. Since embodiments according to the present invention may be subject to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in this specification or application. However, this is not intended to limit embodiments according to the concept of the present invention to specific disclosed forms, and it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. 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 specification. Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are given the same reference number, and redundant descriptions thereof will be omitted. In the description of the following embodiments, the term "pre-set" means that the numerical value of a parameter is predetermined when the parameter is used in a process or algorithm. Depending on the embodiment, the numerical value of the parameter may be set when the process or algorithm starts or during the period in which the process or algorithm is executed. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification, and do not inherently possess distinct meanings or roles. In describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art may obscure the essence of the embodiments disclosed in this specification, such detailed description is omitted. Furthermore, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the