KR20220141951A - Integrated control system for vehicles to improve energy efficiency and driving safety - Google Patents

Abstract

The present invention relates to an integrated control system for a vehicle to improve energy efficiency and driving safety. The integrated control system for a vehicle to improve energy efficiency and driving safety comprises: a driving control unit which detects a brake pedal position and a current vehicle driving state, determines a total braking torque from the detected brake pedal position, determines a regenerative limit torque from the detected current vehicle driving state, generates and outputs a control signal for adjusting a pedal effort according to the total braking torque, and adjusts the pedal effort of the brake pedal in response to the control signal for adjusting the pedal effort; and a regenerative braking control unit which controls a variable pedal effort of the brake pedal in response to the control signal for adjusting the pedal effort for each preset regenerative limit torque. According to the present invention as described above, a vehicle control unit (VCU) alone is formed as a configuration of the VCU, a main control unit (MCU) integrated controller, and an autonomous driving platform extensible software/hardware platform. Accordingly, cost reduction can be achieved, and the energy efficiency of a vehicle can be improved by increasing an energy recovery rate through regenerative braking during braking and coasting.

Description

Integrated control system for vehicles to improve energy efficiency and driving safety

The present invention relates to an integrated control system for a vehicle for improving driving safety and energy efficiency, and more particularly, configuring a controller capable of integrating VCU and MCU in a VCU-only function, and configuring a controller responsible for driving control in autonomous driving technology that provides

As a result of testing by the Ministry of Land, Infrastructure and Transport in 2019, micro electric vehicles are rated at the lowest level of safety, and it is expected that safety regulations will continue to be strengthened in the future. However, in the case of small and medium-sized vehicle manufacturers, due to lack of experience and competency, vehicle integrated control technology does not exist, so the integrated controller (VCU), which is being adopted by global electric vehicle manufacturers to secure vehicle performance, safety and energy efficiency, is not being applied. .

This integrated controller (VCU: Vehicle Control Unit) is a top-level controller that performs integrated vehicle-level control by integrating control information of unit systems (MCU, BMS, LDC, OBC, etc.) in the vehicle.

The e-mobility industry is accelerating the demand and distribution of global e-mobility (electrically driven vehicle) centering on electric vehicles. There are various types of e-mobility demand, such as scooters. However, many parts made in China are used in many parts including powertrains (motors, reducers, inverters, etc.) applied to micro electric vehicles and electric two-wheeled vehicles.

On the other hand, the Korea Post Office in 2019 is trying to localize by requesting that the proportion of domestic components be applied at more than 60% in the bidding for ultra-small electric vehicles, but the market is swarming with low-priced Chinese electric two-wheeled vehicles with the price of 1 million won.

As such, the conventional e-mobility market has problems in that driving performance is low due to the absence of a dedicated VCU for a mobility vehicle, there is no functional safety and failure diagnosis function, and the controller configuration logic is not platformized.

Specifically, due to the absence of a dedicated VCU for a mobility vehicle, as the motor controller drives in the form of signal processing for longitudinal control, driving stability against acceleration or deceleration decreases, and regeneration due to the nature of vehicle driving with relatively high city driving Since the energy saving efficiency that can be generated through braking cannot be maximized, the regenerative braking efficiency is lowered, and since the braking force is controlled only by the driving force of the braking device, there is a problem that the braking safety feeling during braking and the driver’s feeling of braking are unstable. have.

In addition, due to the absence of functional safety and fault diagnosis functions, the motor controller is in charge of driving-related functions and the efficiency of vehicle operation is reduced due to the control independent of vehicle specifications, which leads to deterioration of functional safety, vehicle specifications and There is a problem in that a function of reflecting the operating vehicle characteristics of the controller according to the operating characteristics is required. In addition, since a separate diagnostic parameter function is not implemented, there are problems in that it is impossible to diagnose, cope with, and monitor failure factors when trouble occurs.

And, since the controller configuration logic is not platform-based, it is mainly composed of a motor controller as a basic controller, so it is configured to play most roles in motor operation. There is a problem that there is not, and the configuration of operation logic is limited to a function-oriented configuration, so there is a problem in scalability and platform configuration.

Accordingly, the present applicant is to provide an integrated control system for a vehicle to improve energy efficiency and driving safety, including configuring a controller that can integrate VCU and MCU in a VCU-only function, and configuring a controller in charge of driving control in autonomous driving. .

Korean Patent Publication No. 10-2017-0129706 (2015.02.04)

An object of the present invention is to provide fuel economy (mileage) improvement, system thermal management, and low voltage DC-DC conversion management functions through regenerative braking optimization, and torque in consideration of vehicle speed and deceleration while maintaining mechanical decontamination during braking. By determining, it is to improve the energy efficiency of the vehicle by increasing the energy recovery rate through regenerative braking during braking and coasting.

An object of the present invention is to reduce the cost by integrating the VCU and the MCU by configuring the VCU, the Main Control Unit (MCU) integrated controller, and the autonomous driving platform scalable software/hardware platform configuration with the VCU (Vehicle Control Unit) alone. It is aimed at maximizing control efficiency.

An integrated control system for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention for achieving this technical problem detects a brake pedal position and a current vehicle driving state, and performs total braking from the detected brake pedal position Driving in which a torque is determined to determine a regenerative limit torque from the detected current driving state of the vehicle, and a control signal for adjusting the pedal force is generated and output according to the total braking torque, and the pedal force of the brake pedal is adjusted to correspond to the control signal for adjusting the pedal force. control unit; and a regenerative braking control unit for controlling the variable pedal effort of the brake pedal according to a preset control signal for adjusting the pedal effort for each regenerative limit torque.

Preferably, the driving control unit includes: a driving information detection module configured to detect a vehicle driving state value including a brake pedal position value and driving signals of various parts from an MCU of the vehicle; a total braking torque determination module that determines a total braking torque corresponding to the detected brake pedal position values, and determines a regenerative limit torque for each vehicle driving state value from the total braking torque; and a pedal force control module that receives the total braking torque from the total braking torque determination module, receives the regenerative limit torque preset for each pedal force from the regenerative braking control unit, and generates a control signal for adjusting the pedal effort in consideration of the regenerative limit torque compared to the total braking torque. characterized by including.

In addition, when the driving state value of the vehicle approved by the driving control unit deviates from the preset reference value, the apparatus further comprises a failure diagnosis unit configured to detect a value deviating from the reference value, an identification ID of a component corresponding thereto, and a classification code.

The failure diagnosis unit includes: a priority classification module for arranging identification IDs and classification codes of parts detected by priority indexed from the database; and a display device for outputting a value deviating from a reference value, an identification ID of a part, and a classification code for each sorted priority on the screen.

According to the present invention as described above, fuel economy (mileage) improvement, system thermal management, and low voltage DC-DC conversion management functions are provided through regenerative braking optimization, and while maintaining mechanical decontamination during braking, the vehicle speed and deceleration are taken into consideration. By determining the torque, the energy recovery rate is increased through regenerative braking during braking and coasting, thereby improving the energy efficiency of the vehicle.

According to the present invention, by integrating the VCU and the MCU by configuring the VCU, the MCU integrated controller, and the autonomous driving platform scalable software/hardware platform configuration with the VCU alone, it is possible to reduce the cost and maximize the control efficiency.

As such, according to the present invention, which provides an integrated vehicle controller platform for e-mobility that combines VCU and MCU, fault diagnosis and status information (energy flow, drivable distance, vehicle/system failure history) are displayed, and safety response (ISO -26262) has a possible effect.

1 is a configuration diagram illustrating an integrated control system for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention;
2 is a block diagram illustrating a detailed configuration of a driving control unit of an integrated control system for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention;
3 is a block diagram illustrating a detailed configuration of a regenerative braking control unit of an integrated control system for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention;
4 is a block diagram illustrating a detailed configuration of a fault diagnosis unit of an integrated control system for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention;
5 is a flowchart illustrating an integrated control method for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention.
6 is a flowchart illustrating a process before step S502 or after step S512 of the integrated control method for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention.

The specific features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are based on the principle that the inventor can appropriately define the concept of the term in order to describe his invention in the best way to the technical idea of the present invention. It should be interpreted as a corresponding meaning and concept. In addition, it should be noted that, when it is determined that a detailed description of a known function and its configuration related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof is omitted.

Referring to FIG. 1 , the integrated control system S for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention is regenerative in consideration of the driving control unit 100 for controlling the driving state of the vehicle, and the regenerative limit torque. It is composed of a VCU 10 including a regenerative braking control unit 200 for controlling braking, and a fault diagnosis unit 300 for displaying vehicle status information and whether a fault has occurred.

First, referring to FIG. 2 , the driving control unit 100 determines the total braking torque from the driving information detection module 110 for detecting the brake pedal position and the current vehicle driving state, and the detected brake pedal position, and A total braking torque determination module 120 for determining a regenerative limit torque from the detected current vehicle driving state, a pedal effort control module 130 for generating and outputting a control signal for adjusting the pedal effort according to the total braking torque, and the control for adjusting the pedal effort and a pedal force adjusting device 140 for adjusting the pedal force of the brake pedal to correspond to the signal.

Specifically, the driving information detection module 110 detects a vehicle driving state value including a brake pedal position value and driving signals of various parts from the MCU of the vehicle.

Also, the total braking torque determination module 120 determines a total braking torque corresponding to the detected brake pedal position values, and determines a regenerative limit torque for each vehicle driving state value from the total braking torque. According to the total braking torque determination module 120 , when the vehicle is driving, it is possible to accurately detect the regenerative limit torque according to the value of the vehicle driving state that is changed in real time.

In addition, the pedal effort control module 130 receives the total braking torque from the total braking torque determination module 120 , and receives the regenerative limit torque preset for each pedal effort from the regenerative braking control unit 200 , and the regenerative limit torque compared to the total braking torque A control signal for adjusting the pedal effort is generated in consideration of

In addition, the pedal effort adjusting device 140 synchronizes the pedal effort with the pedal effort control signal received from the pedal effort control module 130, and through this, changes the pedal effort of the brake pedal to match the pedal effort control signal.

Meanwhile, referring to FIG. 3 , the regenerative braking control unit 200 applies a preset regenerative limit torque for each pedal effort to the pedal effort control unit 130 to receive a control signal for adjusting the pedal effort. The regenerative braking control module 220 for controlling the driving of the pedal force adjusting device 140 while monitoring the variation in the pedal force of the brake pedal in consideration of the regenerative limit torque according to the control signal for adjusting the pedal effort received from the module 210, and regenerative braking induction Includes a driver operation module 230 that controls the on/off of the function and applies the received regenerative braking induction on state signal to the pedal effort control module 130 to generate a control signal for pedal effort adjustment is composed by

As such, the integrated control system (S) for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention is integrated with the driving control unit 100 and the regenerative braking control unit 200 to integrate the VCU and the MCU, By optimizing regenerative braking, fuel economy (mileage) improvement, system thermal management, and low voltage DC-DC conversion management functions are provided, reducing costs and maximizing control efficiency.

And, referring to FIG. 4 , when the vehicle driving state value approved by the driving control unit 100 deviates from a preset reference value, the failure diagnosis unit 300 deviates from the reference value, the identification ID of the corresponding part, and classification Failure detection module 310 for detecting codes, identification IDs of parts detected by priority indexed from the database, and priority classification module 320 for sorting classification codes, and values deviating from reference values by the sorted priorities, It is configured to include a display device 330 for outputting the identification ID and classification code of the part on the screen.

Specifically, the failure detection module 310 receives the vehicle driving state value from the driving control unit 100 in real time, and compares each of the set reference value and the vehicle driving state value. At this time, when the specific vehicle driving state value deviates from the set reference value, the identification ID and classification code of the corresponding part are detected.

In addition, the priority classification module 320 matches the identification ID of the part authorized by the failure detection module 310 and the classification code and the risk grade for each part indexed from the database, and the identification ID of the part according to the matched risk grade , and the priority in which the classification code is displayed is changed.

For example, if the risk level is classified as 'Severe', 'Warning', 'Check' or 'Normal' and the corresponding classification code is '1', '2', '3' or '4', The classification code is set to '1' for parts with a risk class of 'Severe', the classification code is set to '2' for parts with 'Warning', and the classification code is set to '3' for parts with 'Check'. , for parts that are 'normal', the classification code may be set to '4'.

In this way, the priority classification module 320 sorts the identification IDs and classification codes of parts that are out of the set reference value in ascending order so that the identification IDs and classification codes of the high-risk parts are exposed at the top.

In this way, the priority classification module 320 sorts the identification IDs and classification codes of parts that are out of the set reference value in ascending order so that the identification IDs and classification codes of the high-risk parts are exposed at the top.

Then, the display device 330 outputs the breakdown history including the value out of the reference value, the identification ID of the part, and the classification code for each priority on the screen, and displays the energy flow included in the vehicle driving state, and the drivable distance on the screen. It may be configured to output additional vehicle information or multimedia information to the screen.

In addition, when the failure detection module 310 receives the vehicle driving state value in real time and compares each of the set reference value and the vehicle driving state value, it may be classified and processed according to the degree of increase in the vehicle driving state value.

For example, when the degree of increase over time of the vehicle driving state value is large (when the increase rate is large), the degree of risk may be greater than that of the vehicle driving state value not considering the increase rate. In the present invention, reflecting this point, when the failure detection module 310 receives the vehicle driving state value in real time and compares each of the set reference value and the vehicle driving state value, when the degree of increase in the vehicle driving state value is greater than a predetermined reference value It can be matched by raising the risk level.

As a specific example, when the degree of increase over time of the vehicle driving state value is not reflected in a state where the vehicle driving state value is '50', when the risk level for a certain part is 'normal', the value of the vehicle driving state value is When the degree of increase in the vehicle driving state value is greater than the predetermined reference value by reflecting the degree of increase over time, the risk level is raised, and the risk level for a given part is changed from 'normal' to 'warning', 'check' or 'severe'. You can change it to match.

In addition, the failure diagnosis unit 300 may be configured to further include a remaining life determination module for determining the remaining life of the component.

In the present invention, the failure detection module 310 receives the vehicle driving state value in real time, compares each of the set reference value and the vehicle driving state value, and then the priority classification module 320 receives the authorization from the failure detection module 310 When matching the part's identification ID and classification code with the risk class for each part indexed from the database, if the residual life of the part is low, the risk class is raised, and the residual life of the part is increased by referring to the residual life of the part. In some cases, it may be configured to downgrade the risk rating.

The present invention further improves driving safety by matching the risk grades according to the remaining lifespan of such parts, and enables stable operation of the integrated control system for vehicles.

In addition, in the present invention, when the remaining life determination module determines the remaining life of the part, the case where the degree of increase in the vehicle driving state value is greater than a predetermined reference value occurs to reflect the number of times the risk level is increased to determine the remaining life of the part. can be configured. A sudden change in the value of the vehicle driving state may affect the remaining life of parts, and the parts with a small remaining life may affect the entire vehicle system.

In the present invention, when the remaining life determination module determines the remaining life of the part, the case where the degree of increase in the vehicle driving state value is greater than a predetermined reference value occurs to reflect the number of times the risk level is raised. Configured to determine the remaining life of the part. As a result, it is possible to accurately determine the remaining life by reflecting the fact that the remaining life can be rapidly reduced, and by reflecting the residual life in the risk class matching, further improving driving safety and stable operation of the integrated control system for vehicles.

Hereinafter, an integrated control method for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention will be described with reference to FIG. 5 .

First, the driving controller 100 detects a brake pedal position and a current driving state of the vehicle ( S502 ).

Next, the driving control unit 100 determines the total braking torque from the detected brake pedal position, and determines the regenerative limit torque from the detected current vehicle driving state ( S504 ).

Subsequently, it is determined whether the regenerative braking control unit 200 receives a regenerative braking induction on state signal (S506).

As a result of the determination in step S506, when the regenerative braking induction on state signal is received, the regenerative braking control unit 200 controls the driving of the driving control unit 100 while monitoring the variation in the pedal effort of the brake pedal in consideration of the regenerative limit torque ( S508).

Next, the driving controller 100 generates and outputs a control signal for adjusting the pedal effort according to the total braking torque (S510).

Then, the driving control unit 100 adjusts the pedal effort of the brake pedal to correspond to the control signal for adjusting the pedal effort ( S512 ).

Hereinafter, with reference to FIG. 6 , a process before step S502 or after step S512 of the integrated control method for a vehicle for improving energy efficiency and driving safety according to an embodiment of the present invention will be described as follows.

Before step S502 or after step S512, the failure diagnosis unit 300 determines whether the vehicle driving state value deviates from a preset reference value (S602).

As a result of the determination in step S602, when the vehicle driving state value deviates from the preset reference value, the failure diagnosis unit 300 detects a value deviating from the reference value, an identification ID of a corresponding part, and a classification code (S604).

Next, the failure diagnosis unit 300 sorts the identification IDs and classification codes of the detected parts by priority indexed from the database (S606).

Then, the failure diagnosis unit 300 outputs a value that deviates from the reference value, the identification ID of the part, and the classification code for each sorted priority on the screen (S608).

As described above, according to an embodiment of the present invention as described above, the VCU alone configures the VCU, the MCU integrated controller, and the autonomous driving platform scalable software/hardware platform configuration, thereby reducing the cost and regenerative braking during braking and coasting. It has the effect of improving the energy efficiency of the vehicle by increasing the energy recovery rate through this.

Although described and illustrated in relation to a preferred embodiment for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described as such, and deviates from the scope of the technical idea. It will be apparent to those skilled in the art that many changes and modifications can be made to the invention without reference to the invention. Accordingly, all such suitable alterations and modifications and equivalents are to be considered as being within the scope of the present invention.

S: Integrated control system for vehicles to improve energy efficiency and driving safety
10: VCU
100: driving control unit
110: operation information detection module
120: total braking torque determination module
130: pedal power control module
140: pedal force control device
200: regenerative braking control unit
210: regenerative braking interlocking module
220: regenerative braking control module
230: driver operation module
300: fault diagnosis unit
310: fault detection module
320: priority classification module
330: display device

Claims (4)

The brake pedal position and the current vehicle driving state are detected, the total braking torque is determined from the detected brake pedal position, and a control signal for adjusting the pedal effort is generated and output according to the total braking torque, and corresponding to the control signal for adjusting the pedal force. a driving control unit that adjusts the pedal force of the brake pedal so as to and
A regenerative braking control unit that controls the variable pedal effort of the brake pedal according to a preset control signal for adjusting the pedal effort for each regenerative limit torque.
An integrated control system for a vehicle for improving energy efficiency and driving safety, characterized in that it includes.
According to claim 1,
The driving control unit,
a driving information detection module for detecting a vehicle driving state value including a brake pedal position value and driving signals of various parts from the MCU of the vehicle;
a total braking torque determination module that determines a total braking torque corresponding to the detected brake pedal position values, and determines a regenerative limit torque for each vehicle driving state value from the total braking torque; and
A pedal force control module that receives the total braking torque from the total braking torque determination module, receives the regenerative limit torque preset for each pedal force from the regenerative braking control unit, and generates a control signal for adjusting the pedal effort in consideration of the regenerative limit torque compared to the total braking torque;
An integrated control system for a vehicle for improving energy efficiency and driving safety, characterized in that it includes.
According to claim 1,
When the vehicle driving state value approved by the driving control unit deviates from a preset reference value, a fault diagnosis unit that detects a value deviating from the reference value, an identification ID of a corresponding part, and a classification code
An integrated control system for a vehicle for improving energy efficiency and driving safety, characterized in that it further comprises.
4. The method of claim 3,
The fault diagnosis unit,
a priority classification module for sorting identification IDs and classification codes of parts detected by priority indexed from the database; and
A display device that outputs values out of standard values, identification IDs of parts, and classification codes for each priority sorted on the screen.
An integrated control system for a vehicle for improving energy efficiency and driving safety, characterized in that it includes.

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