KR20100064723A - Calculating apparatus and method of soc of a battery in a hybrid car - Google Patents

Abstract

PURPOSE: A method for cross-checking controllers of a hybrid vehicle is provided to monitor and control the controller which is abnormally operating using other controllers by transferring a checked result to the other controllers. CONSTITUTION: A method for cross-checking controllers of a hybrid vehicle comprises: a first step(S21) of recognizing functions in order which are performed within a program of a first controller; a second step(S23) of comparing the recognized function with a performed function when a random function is performed in the first controller; a third step(S26) of returning to the second step when the two functions accord and of transferring error information to a second controller when the two functions does not accord; a fourth step(S28) of receiving the error information from the first controller using the second controller and of transmitting a reset command to the first controller when reset is necessary in the first controller; and a fifth step(S29) of resetting a controller hardware when the first controller receives the reset command from the second controller.

Description

Monitoring method for control period of hybrid vehicle {Calculating apparatus and method of SOC of a battery in a hybrid car}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for monitoring a controller of a hybrid vehicle, and more particularly, to a method for processing an abnormally operating controller by mutually monitoring whether another controller is operating normally in a plurality of control periods.

In recent years, environmental problems are highlighted, and technology fields and companies are competing to develop eco-friendly energy. In addition, depletion of oil and natural resources is accelerating competition for development of alternative energy sources. Reflecting this reality, automakers in each country are fiercely competing for the development of next generation automobiles, including pure electric vehicles using batteries as energy sources and engine hybrid electric vehicles and fuel cell hybrid electric vehicles using energy buffers. Etc.

In general, a hybrid vehicle in a broad sense means to drive a vehicle by efficiently combining two or more different power sources, but in most cases, a driving force is obtained by an electric motor driven by a fuel-powered engine and a battery. The vehicle is called a hybrid electric vehicle, or HEV (Hybrid Electric Vehicle), and in recent years, the research on hybrid electric vehicles has been actively conducted in response to the demand for improving fuel economy and developing more environmentally friendly products. It is becoming.

The hybrid electric vehicle is basically equipped with a hybrid control unit (HCU) that controls the overall vehicle, and also has a controller for each device constituting the system.

For example, an engine control unit (ECU) for controlling the overall operation of the engine, a motor control unit (MCU) for controlling the overall operation of the electric motor, a transmission control unit (TCU) for controlling the transmission , A battery management system (BMS) that controls the operation of the battery, and an air conditioner controller (Full Auto Temperature Controller, FATC) that controls room temperature.

These controllers are connected to a high-speed CAN communication line (eg 500 kbps) around the HCU, and the upper controller transmits commands to the lower controller while transmitting and receiving information between the controllers.

As described above, in the hybrid electric vehicle, a plurality of controllers perform cooperative control with each other using the HCU as the upper controller. For example, the HCU exchanges information with each controller through CAN communication and also controls subordinate controllers. The ECU has an engine torque and engine speed information, start key information, throttle / engine on (from the ECU). Coolant temperature) information, and the HCU is also configured to transmit fuel injection command, engine stop command, fuel injection prohibition command, electric motor start information, idle stop information, etc. to the ECU.

In addition, the HCU substantially controls the driving of the electric motor through the MCU. At this time, the MCU maintains the driveability by controlling the driving torque and the driving speed of the electric motor as the driving source according to the control signal applied from the HCU, which is the upper controller.

As described above, cooperative control between controllers is very important in a hybrid electric vehicle, and cooperative control between controllers is performed in all cases from startup to when the user turns off the ignition key.

As such, for the control period cooperative control, each controller is configured to execute a predetermined program, which is composed of a plurality of tasks of various kinds.

Tasks include 10ms task, 50ms task, 100ms task, 1s task, etc. 10ms task is a set of functions that operate every 10ms, 50ms task is a set of functions that operate every 50ms, 100ms task is a function that operates every 100ms 1s task is a set of functions that operate every 1s (seconds). Each task must be called correctly in order.

On the other hand, each task is composed of a plurality of functions, a plurality of functions performed in each task must be performed correctly in that order. For example, the functions A, B, C,... Are performed in order, all the functions of the 10 ms task are performed, and then the functions a, b, c,... Must be performed in order.

This means that in a process in which function A, function B, and function C are performed in sequence, a variable required by function B may be generated in function A, in which case function A must be performed before function B. If the order of functions A and B is reversed, function B is not calculated using the result of the current function A, but is calculated using the result of the previous function A. You will not be able to.

Each conventional controller lacked a means of monitoring whether tasks and functions that the program had to perform were performed in the correct order. Therefore, when some of the tasks and functions are not performed, the order of execution is changed, or the number of times of execution is different, it is difficult to determine the exact cause and there is no countermeasure. If such an error is repeated or continued, there is a problem that a fatal adverse effect on the safe driving of the car.

The object of the present invention for solving the above problems of the prior art, by checking whether the tasks and functions of the program to be performed by each controller is performed in that order and transmitting the result to the other controller, the controller through the other controller It is to provide a mutual monitoring method for the control period of the hybrid vehicle to monitor the operating state of the vehicle.

In the method for mutual monitoring of control periods of a hybrid vehicle according to the present invention for achieving the above object, the method of monitoring mutual control periods in a hybrid vehicle including a first controller and a second controller, wherein the first controller is the first controller. A first step of recognizing, in procedural order, the functions performed in the program executed by the controller; The first controller includes a second step of comparing a function in execution with a function in the procedure order recognized in the first step when an arbitrary function is performed in the first controller; The first controller returns to the second step if the two functions match as a result of the comparison in the second step, and transmits error information to the second controller if the two functions do not match; The second controller receives error information from the first controller and sends a reset command to the first controller when it is determined that the reset of the first controller is necessary; The first controller may include a fifth step of resetting the controller hardware when a reset command is received from the second controller.

According to the present invention, it is possible to check whether programs to be executed by each controller are correctly executed in that order, and transmit a check result to another controller to monitor and control a controller in which the other controller operates abnormally. This has the effect of quickly taking appropriate measures when any controller malfunctions.

Hereinafter, with reference to the accompanying drawings will be described in detail the control period mutual monitoring method of the hybrid vehicle according to the present invention.

1 is a diagram illustrating a system in which a control period mutual monitoring method of a hybrid vehicle according to the present invention is performed.

Generally, a hybrid vehicle includes controllers such as a hybrid controller (HCU) 110, a motor controller (MCU) 120, a battery management system (BMS) 130, and the like, which perform CAN communication with each other.

Each controller includes a central processing unit (CPU) 111, 121, and 131, and memories 112, 122, and 132 storing programs to be executed in the central processing unit (111, 121, 131).

Programs according to the control period mutual monitoring method of the hybrid vehicle according to the present invention are stored in the memory (112, 122, 132) of each controller and executed in the central processing unit (CPU) (111, 121, 131).

In addition, each controller further includes a reset circuit unit 113, 123, 133 to reset the controller under the control of the controller and the other controller for this invention. According to FIG. 1, the reset circuit unit 113 of the HCU 110 is controlled by the CPU 111 of the HCU, the CPU 121 of the MCU 120, or the CPU 131 of the BMS 130. Reset the hardware. The reset circuit unit 123 of the MCU 120 and the reset circuit unit 133 of the BMS 130 also have a CPU 121 of the MCU 120, a CPU 131 of the BMS 130, or a CPU of the HCU 110 ( Under the control of 111, the MCU 120 hardware and the BMS 130 hardware are reset.

The CPUs 111, 121, and 131 of each controller check whether the program of the controller is normally executed, and if an error is detected, the hybrid controller 110 lights a warning light on the cluster and hi-scans the controller. Fault information (DTC) is displayed on 114, 124, and 134, and other controllers are notified through CAN communication.

Then, the CPUs of the other controllers store the controller information in which the error occurs and the error information in the memory 112, 122, 132. If the controller in which the error occurred cannot reset itself, another controller controls the reset circuit of the error generating controller to reset the corresponding error generating controller.

FIG. 2 is an operation flowchart illustrating a process in which each controller detects an error of a program executed by the controller and sends the same to another controller for mutual monitoring of a control period of a hybrid vehicle performed by each controller of the present invention.

First, the controller recognizes the functions to be performed in the program performed by the controller in that order (S21). When the function is executed, the function is sensed in operation S22, and the procedural function and the function performed in step S21 are compared (S23).

As a result of the comparison in step S23, if the two functions match, the process returns to step S22 to repeat steps S22 and S23 for the next function to be performed.

As a result of the comparison in step S23, if the two functions do not match, an error generated in the execution of the program is displayed and stored (S25), and the error information is transmitted to another controller (S26).

If it is necessary and possible to reset the controller on the basis of the error of the controller itself (S27), the controller hardware is reset (S29). Even if a reset is not necessary or not possible by the controller of the controller having an error (S27), when a reset command is received from another controller (S28), the controller hardware is reset (S29).

3 is an operation flowchart illustrating a process when each controller receives error information from an error generating controller for mutual monitoring of a control period of a hybrid vehicle performed by each controller of the present invention.

When an error is received from another controller (error generating controller) in which an error has occurred (S31), information and error information of the error generating controller are stored and displayed (S32). If it is necessary to reset the error generating controller (S33), the reset command is sent to the error generating controller (S34).

1 is a diagram showing a system in which a control period mutual monitoring method of a hybrid vehicle according to the present invention is performed;

FIG. 2 is an operation flowchart illustrating a process in which each controller detects an error of a program performed by the controller and transmits it to another controller for mutual monitoring of a control period of a hybrid vehicle performed by each controller of the present invention;

3 is an operation flowchart illustrating a process when each controller receives error information from an error generating controller for mutual monitoring of a control period of a hybrid vehicle performed by each controller of the present invention.

Claims (3)

In the method for mutual monitoring of the control period in a hybrid vehicle including a first controller and a second controller, The first controller includes a first step of recognizing functions performed in a program executed by the first controller in a procedure order; The first controller includes a second step of comparing a function in execution with a function in the procedure order recognized in the first step when an arbitrary function is performed in the first controller; The first controller returns to the second step if the two functions match as a result of the comparison in the second step, and transmits error information to the second controller if the two functions do not match; The second controller receives error information from the first controller and sends a reset command to the first controller when it is determined that the reset of the first controller is necessary; And the first controller includes a fifth step of resetting the controller hardware when a reset command is received from the second controller. The method of claim 1, wherein the third step, And the first controller stores and displays the error information when the two functions do not match as a result of the comparison in the second step. The method of claim 1, wherein the fourth step, And the second controller stores and displays error information received from the first controller and the first controller information.

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