KR20190026701A - Vehicle control unit automatic control device for measuring energy consumption efficiency of electric vehicle - Google Patents

Abstract

A VCU automatic control device for measuring the energy consumption efficiency of an electric vehicle can accurately measure the energy efficiency of the electric vehicle through the automatic control of a VCU according to a target speed running graph set by a user at a place where environment desired by the user is established. Furthermore, it is possible to measure the energy consumption efficiency of the electric vehicle under unmanned and severe environment so that it is possible to reduce personal injury caused by the experiment. The VCU automatic control device includes: software including a VCU control system, a target driving speed graph implementation system over time, energy consumption efficiency model expression, and a transmission/reception communication system; communication hardware for receiving vehicle information data of the electric vehicle through the software in a vehicle information collection device (OBD) of the electric vehicle; communication hardware for transmitting VCU control data to a digital-to-analog converter through the software; a digital-analog converter for converting a digital signal received from the VCU control software into a voltage signal and transmitting the voltage signal to the VCU; and a display including an input unit for user settings and communication settings and an output unit for providing electric vehicle data and graphs.

Description

Technical Field [0001] The present invention relates to an automobile control unit for automatically measuring the energy consumption efficiency of an electric vehicle,

The present invention relates to a VCU automatic control method and apparatus for measuring the energy consumption efficiency of an electric vehicle and, when measuring the energy consumption efficiency of the electric vehicle, increases the reliability of the resultant value by performing the energy efficiency measurement through the VCU control.

Due to the regulation of greenhouse gas emissions, development and research of electric vehicles are actively being carried out globally. Unlike conventional energy-efficient fuel economy vehicles, which have a mileage (km) per liter (L), the authorized fuel consumption (energy consumption efficiency) of an electric vehicle is the mileage (km) per electric power (kWh).

At present, the electric vehicle authorized fuel consumption (energy consumption efficiency) measurement method is a driving aid device for indicating a mode set by a tester on a test chassis dynamometer in which a real road load condition is reproduced in a constant temperature laboratory ).

When a situation where the target speed can not be reached at full charge ( for example, when the remaining battery power is close to 0), the test is ended and the energy consumption efficiency is calculated based on the test result.

Currently, Korea uses SCT and MCT to measure energy consumption efficiency. SCT (Single Cycle Test) During the driving mode test, the measurement time of the electric car is 160km or less when charging is about 4 hours to 5 hours. And MCT (Multi Cycle Test) mode takes about half the time of SCT mode measurement time. This is 4 times longer than normal car and 2 times longer than normal car.

Currently, automakers are able to develop more than 300km of full-charge driving distance, and some cars can travel more than 300km. This leads to a reduction in accuracy due to the enormous fuel consumption (energy consumption efficiency) measurement time and the error rate due to equipment and tester fatigue. Therefore, a method for measuring the fuel efficiency (energy consumption efficiency) with high reliability is needed.

 Energy Management Corporation, Study on applicability of MCT test method for electric vehicle, 2014.12, page 9-99 A Comparison of the Fuel Economy Test Methods on Electric Vehicles (EVs), Journal of the Korean Institute of Energy Engineers, Vol.28 No.3, June 2017.6, page297-294

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a method and apparatus for automatically correcting an electric vehicle So that the energy consumption efficiency can be measured.

In order to achieve the above object, the VCU automatic control device for measuring the energy consumption efficiency of an electric vehicle includes software including a VCU control system, a target driving speed graph implementation system over time, an energy consumption efficiency model system, and a transmission / reception communication system; A communication hardware for receiving the vehicle information data of the electric vehicle with the software in a vehicle information collection device (OBD) of the electric vehicle; Communication hardware for transmitting VCU control data to the digital-to-analog converter in the software; A digital-analog converter for converting a digital signal received from the VCU control software into a voltage signal and transmitting the voltage signal to the VCU; An input unit for user setting and communication setting, and an output unit for providing electric vehicle data and a graph.

If the magnitude of the voltage when the pedal is stepped 100% is 2.5 V, the VCU control system

A area: Data transfer step to the VCU when the difference between the target driving speed and the actual driving speed is less than 10 km / h, the speed difference cumulative value is more than 10 km / h, the voltage when the pedal is stepped 10%

Area B: The difference between the target driving speed and the actual driving speed is more than 10 km / h and less than 20 km / h; A step of transmitting data to the VCU at a voltage of 0.25 V when the accelerator pedal is stepped on by 10%; And less than 30 km / h from 20 km / h; A step of transmitting data to the VCU at 0.5 V when the pedal is stepped by 20%;

값으로 전송되는 단계;C area: If the difference between the target driving speed and the actual driving speed is ≥ 30 km / h, the magnitude of the voltage transmitted to the VCU =

≪ / RTI >

When the difference between the target traveling speed and the actual traveling speed is equal to or more than 100 km / h, the step of transmitting data to the VCU at a voltage of 2.5 V is characterized.

Graph showing the target driving speed according to the NEDC, SCT, WLPT, MCT which is the official energy consumption efficiency test of the electric vehicle in the target driving speed graph implementation system over time; And a graph for providing a target running speed according to a time inserted by the user in the software.

로 산출 단계;를 포함하는 것을 특징으로 한다. Calculating the energy consumption efficiency value of the electric vehicle by applying to the energy consumption efficiency model formula defined in each of the NEDC, SCT, WLPT, and MCT, which is an official energy consumption efficiency test of the electric vehicle, in the energy consumption efficiency model expression; And the electric vehicle energy consumption efficiency value of the graph of the target driving speed according to the time inserted by the user

And a calculating step of calculating a difference between the first and second values.

In the display input section, the transmission / reception communication setting area, the selected area of the formal energy consumption efficiency measurement test (NEDC, SCT, WLPT, MCT), the file insertion area equipped with the graph of the target driving speed according to the time input by the user; And at least one of them.

In the display output section, the battery remaining amount (%), the cumulative running distance (km), the usable battery energy (kWh), the motor torque Nm, the driving battery voltage (V) Current speed (km / h), target driving speed graph; And at least one of them.

On the other hand, in the VCU automatic control method for measuring the energy consumption efficiency of electric vehicles,

Setting a transmission / reception communication setting area, selecting an official energy consumption efficiency measurement test of the electric vehicle, and providing a target driving speed file insertion area according to a time inputted by the user;

A communication step of transmitting data from the software to a digital-analog converter; Transmitting speed related voltage data from the digital-to-analog converter to the VCU; A communication step of transmitting data from the electric vehicle to the software;

Measuring the energy consumption efficiency of the electric vehicle through VCU automatic control according to the target driving speed graph selected and inserted by the tester using the software;

The cumulative running distance km of the electric vehicle, the remaining battery amount%, the current speed km / h, the driving battery voltage V, and the motor torque Nm data through the communication link between the electric vehicle OBD terminal and the software ; And calculating energy consumption efficiency of the electric vehicle according to a model of an energy consumption efficiency model installed in the software.

According to the VCU control device for measuring the energy consumption efficiency of the electric vehicle of the present invention, the following effects can be obtained.

As a control system designed to solve the increase of fatigue and error caused by long time measurement, it is possible to select the desired driving speed graph (mode) according to the user's desired time, Can be calculated.

Furthermore, the energy consumption efficiency test of the electric vehicle can be carried out unattended, thereby solving the risk of personal injury and accurately evaluating the electric energy consumption efficiency and safety of the electric vehicle in a severe environment.

1 is a block diagram of a VCU automatic control device for measuring the energy consumption efficiency of an electric vehicle
Fig. 2 is a graph showing the relationship
FIG. 3 is a schematic flowchart of the VCU automatic control device software for measuring the energy consumption efficiency of an electric vehicle
4 is a main flowchart of a VCU automatic control device software for measuring energy efficiency of an electric vehicle
5 is a control flow chart of the VCU automatic control device software for measuring the energy consumption efficiency of the electric vehicle
6 is a graph showing the voltage (V) transmitted to the VCU when the target traveling speed is equal to or greater than the actual traveling speed difference?
FIG. 7 is a graph showing the voltage (V) transmitted to the VCU according to the number of loops when the target traveling speed is equal to the actual traveling speed difference < 10 km / h
to be.

The present invention having such characteristics can be more clearly explained through the embodiments thereof.

1 is a block diagram of a VCU automatic control apparatus for measuring the energy consumption efficiency of an electric vehicle.

The apparatus comprises a display (110) and hardware (120) for operating the software of the apparatus, communication hardware (130) for transmitting VCU control data to a digital to analog converter in the software, A digital-to-analog converter 140 for converting the signal into a signal and transmitting it to the VCU, and communication hardware 160 for transmitting the vehicle information data of the electric vehicle to the software in the vehicle information collection device OBD of the electric vehicle.

The display 110 can be implemented on a screen-usable medium such as a PC monitor and a tablet PC, and can be operated and set by a user through a screen.

The hardware 120 operates software including an energy consumption efficiency model expression, a target speed running graph implementation system, a VCU control system, and a communication system.

The communication device 130 for transmitting data to the digital-to-analog converter in the software is a CAN communication device, RS232 and RS485.

The digital-to-analog converter 140 may include a micro controller unit (MCU).

The digital-to-analog converter and VCU connection can be connected via the VCU connection cable (150) and the excel pedal mounted on the existing electric vehicle. It is a matter of course that the technical idea of the present invention can be applied to a device and a program capable of connecting a VCU and a digital-analog converter.

The communication 160 for data reception in the vehicle information collecting device (OBD) of the electric vehicle can be performed by the CAN communication method.

This device enables accurate energy consumption efficiency measurement of electric vehicle through VCU automatic control according to the target speed running graph set by the user where the environment desired by the user is established. Furthermore, it is possible to measure the energy consumption efficiency of an electric vehicle with unmanned environment in a severe environment, and it is possible to reduce personal injury caused by the experiment.

According to Figure 2, the control step of the device

(a) A step 210 of transmitting to the digital-to-analog converter 140 a value calculated by a model equation for each area divided according to the difference between the target traveling speed and the actual traveling speed (km / h)

(b) The digital-to-analog converter 140 converts the digital signal data into an analog signal and transmits the analog signal to the VCU 120,

(c) (230) receiving actual driving speed data received by the software in vehicle information collection (OBD) of an electric vehicle,

. &Lt; / RTI &gt;

The data transmitted from the software to the digital-analog converter 140 transmits a digital signal including a percentage (%) of stepping on an excel pedal. On the other hand, there is no limit to the percentage (%) of stepping on the pedal.

The analog signal converted by the digital-to-analog converter 140 may include a voltage that is a signal transmitted to the VCU when an actual person presses an Excel pedal.

FIG. 3 is a schematic flow chart of a VCU automatic control device software for measuring an energy efficiency of an electric vehicle, and FIG. 4 is a main flowchart of a VCU automatic control device software for measuring an energy efficiency of an electric vehicle.

4, in the main screen A310, the user setting B410 and the official energy consumption efficiency measurement graph mode selection (NEDC, SCT, WLPT, MCT) of the electric vehicle and the speed It is possible to insert a file (B420) that can implement a graph.

5 is a control flowchart of the VCU automatic control device software for measuring the energy consumption efficiency of the electric vehicle. On the other hand, in the present embodiment, the magnitude of the voltage when the pedal is stepped 100% is 2.5 V, which is user-configurable.

As shown in FIGS. 5 and 6, when the difference between the target traveling speed and the actual traveling speed is? 30 km / h, the VCU control is performed in step C520.

식에 의해 산출된 값을 VCU에 전송한다. (630)At this time, the voltage (V)

And transmits the value calculated by the equation to the VCU. (630)

If the difference between the target traveling speed and the actual traveling speed is 100 km / h or more, a voltage of 2.5 V when the accelerator pedal is depressed at 100% is transmitted to the VCU. (630)

As shown in FIGS. 5 and 6, when the difference between the target traveling speed and the actual traveling speed is? 10 km / h (C530), the VCU control is performed in step C540.

In step C540, if the difference between the target traveling speed and the actual traveling speed is less than 10 km / h and less than 20 km / h, a voltage of 0.25 V when the pedal is stepped by 10% is transmitted to the VCU. (620)

Alternatively, when the difference between the target traveling speed and the actual traveling speed is 20 km / h or more and less than 30 km / h, a voltage of 0.5 V when the pedal is stepped by 20% is transmitted to the VCU. (620)

As shown in FIG. 5, when the difference between the target traveling speed and the actual traveling speed is < 10 km / h, the VCU control is performed in step C550.

Referring to FIG. 7, when the cumulative value of the difference between the target running speed and the actual running speed reaches 10 km / h or more, a voltage of 0.25 V when the pedal is stepped by 10% is transmitted to the VCU.

In this case, if the difference between the target driving speed and the actual driving speed is maintained to be <10 km / h, the difference value of the cumulative speed value (km / h) - 10 km / h is applied as the next accumulated value.

In step C560, the energy consumption efficiency measurement is terminated when the amount of energy consumed (kW) when the target speed is reached is greater than the amount (kW) of the battery power of the test vehicle or when the user termination is performed.

The graph of the target running speed graph according to time includes at least one of graphs for providing a target running speed according to NEDC, SCT, WLPT, and MCT, which is an official energy consumption efficiency test of an electric vehicle.

Further, the present invention is characterized by providing a graph of the target running speed according to the time inserted directly by the user in the software.

The energy consumption efficiency value of the electric vehicle is calculated by applying formula formula of energy consumption efficiency of each of NEDC, SCT, WLPT and MCT, which is an official energy consumption efficiency measurement test.

식에 적용하여 산출한다. In addition, the electric vehicle energy consumption efficiency value of the graph of the target driving speed according to the time inserted by the user is

.

The display input unit includes a transmission / reception communication setting area, a selection area of the official energy consumption efficiency test (NEDC, SCT, WLPT, MCT), and a file insertion area equipped with a graph of the target driving speed according to the time input by the user.

The display output unit is configured to output the battery remaining amount (%), the cumulative running distance (km), the usable battery energy (kWh), the motor torque Nm, the driving battery voltage (V) Speed (km / h), and target driving speed graph.

On the other hand, in the VCU automatic control method for measuring the energy consumption efficiency of electric vehicles,

Setting a transmission / reception communication setting area, selecting an official energy consumption efficiency measurement test of the electric vehicle, and providing a target driving speed file insertion area according to a time inputted by the user;

A communication step of transmitting data from the software to a digital-analog converter; Transmitting speed related voltage data from the digital-to-analog converter to the VCU; A communication step of transmitting data from the electric vehicle to the software;

A step of measuring the energy efficiency of the electric vehicle through VCU automatic control according to the target driving speed graph selected and inserted by the tester using the software;

The cumulative running distance km of the electric vehicle, the remaining battery amount%, the current speed km / h, the driving battery voltage V, and the motor torque Nm data through the communication link between the electric vehicle OBD terminal and the software ; And calculating the energy consumption efficiency of the electric vehicle according to an energy consumption efficiency model equation installed in the software

When the target running speed (km / h) is larger than the actual running speed (km / h), the VCU control is performed. It is to be understood that the terms " a region &quot;, &quot; (a) &quot;, etc. are used in the specification and the appended claims for purposes of illustration and are not intended to imply their relative importance or purpose. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

110: Display
120: Hardware
130: Communication hardware
140: Digital-to-Analog Converter
150: Connecting cable
160: CAN communication device
170: OBD terminal
180: Vehicle control unit (VCU)
610: The difference between the target driving speed and the actual driving speed (10 km / h) (area A)
620: 10km / h ≤ Area between the target driving speed and actual traveling speed <30km / h (area B)
630: Difference between target driving speed and actual driving speed ≥ 30 km / h (C area)

Claims (6)

VCU automatic control device for measuring energy consumption efficiency of electric vehicle;
Software including VCU control system, target driving velocity graph implementation system over time, energy consumption efficiency model expression, transmission / reception communication system;
A communication hardware for receiving the vehicle information data of the electric vehicle with the software in a vehicle information collection device (OBD) of the electric vehicle; Communication hardware for transmitting VCU control data to the digital-to-analog converter in the software;
A digital-analog converter for converting a digital signal received from the VCU control software into a voltage signal and transmitting the voltage signal to the VCU;
A display comprising an input for user settings and communication settings and an output for providing electric vehicle data and graphs;
A VCU automatic control device for measuring the energy consumption efficiency of an electric vehicle
The method of claim 1, wherein
The VCU control system
When the magnitude of the voltage when the accelerator pedal is stepped on 100% is 2.5 V,
Area A: When the difference between the target driving speed and the actual driving speed is < 10 km / h,
Difference between the target driving speed and the actual driving speed If the cumulative value is more than 10 km / h, data of 0.25 V, which is the voltage when the pedal is stepped by 10%, is transmitted to the VCU
B area: 10km / h ≤ Target driving speed and actual traveling speed difference <30km / h
Difference between target driving speed and actual driving speed
Less than 10 km / h and less than 20 km / h; Data transfer to the VCU is 0.25V when the pedal is pressed by 10%
20 km / h or more but less than 30 km / h; Data transmission to the VCU when 0.5% of the voltage is applied when the pedal is pressed by 20%
Area C: If the difference between the target driving speed and the actual driving speed is ≥ 30 km / h,
The magnitude of the voltage transmitted to the VCU =

When the difference between the target driving speed and the actual driving speed is more than 100 km / h, a 2.5 V voltage is transmitted to the VCU;
A VCU automatic control device for measuring the energy consumption efficiency of an electric vehicle The method of claim 1, wherein
In the target running speed graph implementation system over time,
Graph showing the target driving speed according to NEDC, SCT, WLPT, MCT which is an official energy consumption efficiency test of an electric vehicle; And a graph that provides the software with a target running speed according to the time inserted by the user
A VCU automatic control device for measuring the energy consumption efficiency of an electric vehicle The method of claim 1, wherein
Energy consumption efficiency model
Calculating the energy consumption efficiency value of an electric vehicle by applying the energy consumption efficiency model formula defined in each of NEDC, SCT, WLPT, and MCT, which is an official energy consumption efficiency test of an electric vehicle;
The electric vehicle energy consumption efficiency value of the graph of the target driving speed according to the time inserted by the user is

Calculated as
Characterized by VCU automatic control device for measuring energy consumption efficiency of electric vehicle The method of claim 1, wherein
The display input unit includes a transmission / reception communication setting area, a selection area of the official energy consumption efficiency test (NEDC, SCT, WLPT, MCT), a file insertion area equipped with a graph of the target driving speed according to the time input by the user,
The display output unit is configured to output the battery remaining amount (%), the cumulative running distance (km), the usable battery energy (kWh), the motor torque Nm, the driving battery voltage (V) Speed (km / h), target driving speed graph
And a control unit for controlling the energy efficiency of the electric vehicle, Setting a transmission / reception communication setting area, selecting an official energy consumption efficiency measurement test of the electric vehicle, and providing a target driving speed file insertion area according to a time inputted by the user;
A communication step of transmitting data from the software to a digital-analog converter; Transmitting speed related voltage data from the digital-to-analog converter to the VCU; A communication step of transmitting data from the electric vehicle to the software;
A step of measuring the energy efficiency of the electric vehicle through VCU automatic control according to the target driving speed graph selected and inserted by the tester using the software;
The cumulative running distance km of the electric vehicle, the remaining battery amount%, the current speed km / h, the driving battery voltage V, and the motor torque Nm data through the communication link between the electric vehicle OBD terminal and the software ; Calculating the energy consumption efficiency of the electric vehicle according to an energy consumption efficiency model equation installed in the software;
A method for automatically controlling a VCU for measuring energy efficiency of an electric vehicle

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