KR101444137B1 - Integrated Tester and Testing Method for Vehicle Heater - Google Patents

Abstract

The present invention provides an integrated testing apparatus for a vehicle heater including a burner coupling body, a boiler coupling body, and a control unit. The burner coupling body is a combustion device that mixes fuel with air, and includes an ignition device, a driving motor, a fuel pump, a combustion air feeding fan, and a nozzle. The boiler coupling body is connected to a heater to be tested, detects the abnormality of the heater, and includes a plurality of overheating temperature detectors and a water temperature detection control device measuring vehicle coolant temperature and operating the driving motor at or below a predetermined temperature. The control unit is connected to the burner coupling body and the boiler coupling body by using an electric wire, and includes an electronic circuit which automatically controls electrical characteristics including an ignition operation, combustion state check, and temperature control. According to the present invention, repair time can be shortened in the event of heater malfunctioning, and on-site repair is allowed so that on-site repair can be performed during an operation. Also, the present invention is capable of inspecting all heater systems that are attached to various types of vehicles. Accordingly, the present invention can be utilized as a testing apparatus for on-site repair that allows quality inspection and accurate malfunctioning part detection.

Description

TECHNICAL FIELD [0001] The present invention relates to an integrated test apparatus for a vehicle heater,

The present invention relates to a test apparatus for testing a heater, and more particularly, to a test apparatus capable of checking the operation abnormality of a coolant heater in various types of track vehicles and determining the cause of failure.

The heater is mounted on a tracked vehicle and a standard, commercial military bus vehicle. In the event of a fault, precise repair repair is limited and replacement of the heater assembly causes a waste of the defense budget. The heater is an essential item for winter operation. It performs the engine preheating function for starting the engine at low temperature in subzero temperature operation and the function of heating the cooling water for the crew heating.

The first K1 tanks were supplied with test equipment, but it was not used due to computer errors caused by aging. The test equipment was only able to inspect the K1 tram heater. When the heater failed, the equipment was removed from the equipment and repaired. In addition, different heater support systems in different vehicles have different maintenance support systems. This is because each vehicle heater electrical signaling system is different.

The absence of heater system testing equipment limits the ability to determine whether critical repairs are available or not, resulting in a waste of budget due to the large number of repair attachments. This necessitates the development of on-site test equipment capable of quality inspection and accurate detection of faulty fittings.

The present invention aims at shortening the time required for maintenance in the event of a heater failure and providing a repairable field test apparatus for repair during operation.

The present invention also provides test equipment that can be applied to different vehicle heater systems. Accordingly, the present invention intends to provide an on-site calibration test apparatus capable of quality inspection and accurate detection of failure parts.

In order to solve the above-described problems, the present invention provides a burner assembly, a boiler assembly, and a control unit, wherein the burner assembly is a combustion device for mixing fuel and air and includes an ignition device, a drive motor, a fuel pump, The boiler assembly includes a plurality of overheat temperature sensors, a temperature sensor for measuring the temperature of the cooling water of the vehicle, and a water temperature sensing control device for operating the driving motor only at a predetermined temperature or lower. Wherein the control unit is electrically connected to the burner combination and the boiler combination and comprises an electronic circuit for automatically controlling electrical characteristics including a starting operation, Provide a test device.

Also, using such a device

1) Step: If the temperature is below 0, it is placed in the preheating mode for a certain period of time, and the operation mode is set.

2) Step: Activate the coolant pump and drive motor by inputting power to the control unit.

3) Step: The cooling water pump circulates the cooling water inside the engine block to the preheating heater, and the driving motor rotates the combustion air fan and fuel pump to supply the combustion air and fuel.

4) Step: When the coolant pump and the drive motor operate, power is supplied to the ignition device and the fuel cutoff valve after a certain time.

5) Step: At this time, the fuel is atomized at a pressure higher than a certain level in the nozzle, and a high voltage is generated in the ignition device and the ignition is caused by the spark of the ignition electrode.

6) Step: At the moment of ignition, the flame detector detects the flame light, shorting the input voltage of the ignition device.

7) Step: If the steps 1) to 6) are performed, the ignition is continued and the cooling water starts to be warmed.

8) Step: When the coolant temperature rises to 75, the water temperature sensor detects this and stops the fuel injection by short-circuiting the fuel valve power at the control unit.

9) Step: The fuel is not injected and air is supplied for a certain period of time to burn the residual fuel.

10) Step: When the coolant temperature drops to 65, the water temperature sensing controller senses this and the drive motor is operated again and ignition is performed.

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The present invention shortens the time required for maintenance in the event of a failure of the heater, and enables repairable field maintenance during operation.

The present invention can also inspect all heater systems attached to various kinds of vehicles. Accordingly, the present invention can be utilized as a test apparatus for on-site calibration that can perform quality inspection and accurate failure detection.

1 is an overall flow diagram of the present invention.
2 is a flow chart of the automatic control portion of the present invention.
3 is an overall circuit diagram of the present invention.

The present invention includes a burner combination, a boiler combination and a control unit.

The burner assembly is a combustion device that assists the test vehicle heater to ignite and mixes fuel and air. An ignition device, a drive motor, a fuel pump, a combustion air pressure fan, and a nozzle.

The boiler assembly is connected to the vehicle and detects the presence or absence of the vehicle heater under test. The boiler assembly is connected to the heater to be tested to detect the presence or absence of the heater. The boiler assembly includes a plurality of overheat temperature sensors and a water temperature sensing control device that measures the temperature of the cooling water of the vehicle and operates the driving motor only when the temperature is below a predetermined temperature.

The control unit is connected to the burner combination and the boiler combination via electrical leads to control the overall operation of the present invention. The control unit includes electronic circuits that automatically control electrical characteristics, including startup operations, combustion condition checks, and temperature control.

Hereinafter, the operation of the components of the present invention will be described with reference to FIG.

If the signal from the vehicle power source is supplied to the power source side, the automatic mode or the manual mode can be selected depending on whether the power switch is turned on or off. In the automatic mode, a signal is given to the preheating sensor operation unit and the C / U control unit, and the operation signal detection unit notifies the user of the abnormality of the test object heater through the LED lamp. At this time, the C / U control unit gives a signal to the cooling water circulation P / P. In the manual mode, signals are sent to the entire fault detection unit as well as to the preheating sensor operation unit. In the failure detection unit, the single operation unit transmits the single operation signal to the test target heater. The operation signal detection unit receives the signal from the test target heater and notifies the user of the abnormality through the LED lamp. The behavior in the passive mode is controlled by the diagnostic signal measuring unit.

Hereinafter, a common operation sequence irrespective of the control mode and the type of heater to be tested according to an embodiment of the present invention will be described.

1) The power switch of the present invention is put into the operation mode. The power switch has three modes: stop, preheat, and run. If the temperature is less than 0, it is placed in the preheating mode for a certain period of time, and then the operation mode is set.

2) When power is supplied to the control unit, the coolant pump and the drive motor operate.

3) The cooling water pump circulates the cooling water inside the engine block to the preheating heater. The drive motor rotates the combustion air fan and the fuel pump to supply combustion air and fuel.

4) When the coolant pump and the drive motor operate, power is supplied to the ignition device and the fuel cutoff valve after a certain period of time.

5) At this time, the fuel is atomized at a pressure higher than a certain level in the nozzle, and a high voltage is generated in the ignition device and the ignition is performed due to the spark of the ignition electrode.

6) At the instant of ignition, the flame detector detects flame light and shorts the input voltage of the ignition device.

7) If the above steps 1) to 6) are performed, the ignition is continued and the cooling water starts to be warmed.

8) When the coolant temperature rises to 75, the water temperature sensing controller detects this and stops the fuel injection by shorting the fuel valve power at the control unit.

9) The fuel is not sprayed and air is supplied for a certain period of time to burn the remaining fuel.

10) If the cooling water temperature drops down to 65, the water temperature sensing control device senses this and the driving motor is operated again and ignition is done.

Hereinafter, a checking method using a testing apparatus according to another embodiment of the present invention will be described.

1) Connect the battery power cable to the first connection of the test equipment.

2) Connect the test equipment second connection and the coolant circulation pump check cable circulation pump connection.

3) Connect the test equipment third connection and the heater inspection cable to the inspection vehicle heater.

4) Tighten the fourth connection of the test equipment and the heater overheat switch terminal.

5) When the main power switch is turned on, the green LED1 is turned on by the main power relay contact and the + power after 15A fuse is input to the control unit F terminal, motor drive relay and power standby state.

6) Automatic push button operation method is as follows.

If it is less than 0, the heater nozzle is preheated when the preheating switch is turned on and the preheating lamp (LED3) is turned on when the preheating is completed. Turn off the warm-up switch and turn on the switch to operate the temperature switch, delay circuit and low-voltage circuit in the heater. At the same time, the LED 2, such as the heater operation, is turned on, the circulation pump and the heater motor are sequentially operated, and the LED 8 is turned on and ignited at the same time.

LED4 is turned on after starting by battery heater operation, LED5 is a cooling water circulation pump, etc. LED6 detects flame when it is ignited by flame detector and lights up. The voltage is displaced according to the size of the flame, and the brightness of LED and the like fluctuates finely.

The LED7 is turned on until the coolant temperature reaches 75 due to the coolant temperature control sensor detection, etc., and goes out when it reaches 75. In addition, the control unit short-circuits the solenoid valve power supply to stop the fuel injection.

When the coolant temperature drops to 65, it is detected by the temperature control sensor, the drive motor is activated again, ignition is performed, and LED7 is turned on.

7) When the operation switch is turned off, ignition is stopped and only the motor is started to cool the inside of the heater. When the overheat temperature sensor is activated, the power through the terminal A of terminal 4 is cut off and LED 9 is turned off. Temperature control detectors and overtemperature detectors are turned on and off by bimetallic temperature. In this way, in the automatic control heater inspection, it is possible to check the single unit inside the heater and the control unit by turning the LED on and off.

This can be summarized in a schematic flowchart with reference to FIG. The heater control unit and the control unit are interconnected by an electrical signal. The control unit and the heating element are interlocked by electrical signals. The heater supplies cooling water to the engine, the cooling water passes through the cooling water tank and the pump, and the cooled cooling water is circulated after entering the heater again.

The following describes how to detect and check for faults when manually controlling the heater. In this case, the control unit or the internal parts of the heater have failed.

1) Connect the battery power cable to the first connection of the test equipment.

2) Connect the test fixture sixth connection and the heater inspection cable to the inspection heater.

3) Connect test equipment fifth connection and heater overtemperature switch to terminals.

4) When the main power switch is turned on, the green LED1, which is the main power, is turned on by the main power relay contact and the + power after 15A fuse is input to the control unit F terminal. Manual disables the control unit.

5) Operate manual pushbutton. When the heater is turned on, the heater nozzle is preheated. When the preheating is completed, the preheating LED 10 is turned on.

6) Check the motor inside the heater. Test equipment When the motor switch is turned on, the motor runs through terminal B. It is possible to check whether the motor is running or not by checking the rotation sound.

7) Check the heater ignition. When the test equipment ignition switch is turned on, the ignition is activated via the J terminal.

8) Check the heater internal fuel valve. Test equipment Fuel valve The valve is opened when the switch is turned on.

 During the steps from 6) to 8), power is supplied to the E terminal. If you turn on the switch in sequence at each step, it will ignite through D terminal and operate.

9) After confirming ignition, turn off the ignition switch to prevent current consumption. Next, check whether the external temperature control function of the heater is correct. When the heater is operated and the inside of the combustion chamber reaches a certain temperature, the temperature control contact drops. Initially, when the switch is turned on, the LED 12 is turned on and then turned off when a certain temperature is reached. Temperature control switch can set temperature value by bimetallic method.

10) Check the heater internal flame detector. When the ignition is detected, the flame detector detects the flame, the power is connected, and the LED 11 is turned on. The flame detector lights up when the flame detector is turned on. The voltage fluctuates depending on the size of the flame. A tester can be used to measure the voltage at the terminals F and E of the test equipment.

11) Check the overheat temperature switch inside the heater. When the heater is operated and reaches a certain temperature or more, the fuel valve should be turned off to stop fuel injection. The power through the fifth connection A terminal is cut off and the LED 14 is turned off. The overheat temperature switch is installed so that it can be pushed outside the heater. When it overheats, it falls to the contact point and press the button manually when resetting. The overtemperature temperature switch can be set by bimetallic method.

12) Cool the heater combustion chamber after checking the temperature control detector and overheat temperature sensor. External components are sucked into the heater by cooling the motor by turning off the components except for the main power and motor. The cooling time is until the temperature control detector has a contact point and the test equipment can be checked by turning on the temperature control detector and turning on the motor until the temperature control light is on.

In the manual control heating inspection, the individual components in the heater can be checked while excluding the control unit. It is made to be able to perform the final inspection in the automatic state after the repair action is completed due to the failure of the internal part of the heater.

Hereinafter, the electric signal flow of the present invention will be described with reference to FIG.

The 16-bit microprocessor is the control unit in the left-hand center of the schematic. Seven of the eight bits located on the left side of each of these are connected to LED1 through LED7, respectively, to control the LEDs on and off. Seven of the eight bits on the right are connected to the third input to receive the inputs of the external environment. Two unused bits are used for internal logic operations. On the right side of the circuit, on the other hand, a sixth connection for receiving the user's input controls the components of the test equipment.

Claims (2)

A burner combination, a boiler combination and a control unit,

Wherein the burner combination is a combustion device for mixing fuel and air and includes an ignition device, a drive motor, a fuel pump, a combustion air pressure fan, and a nozzle,

The boiler assembly includes a plurality of overheat temperature sensors and a water temperature sensing control device that measures the temperature of the cooling water of the vehicle and operates the driving motor only at a predetermined temperature or lower,

Wherein the control unit is electrically connected to the burner combination and the boiler combination and includes electronic circuitry for automatically controlling electrical characteristics including startup operation, combustion condition check and temperature regulation.
1) Step: If the temperature is below 0, it is placed in the preheating mode for a certain period of time, and the operation mode is set.
2) Step: Activate the coolant pump and drive motor by inputting power to the control unit.
3) Step: The cooling water pump circulates the cooling water inside the engine block to the preheating heater, and the driving motor rotates the combustion air fan and fuel pump to supply the combustion air and fuel.
4) Step: When the coolant pump and the drive motor operate, power is supplied to the ignition device and the fuel cutoff valve after a certain time.
5) Step: At this time, the fuel is atomized at a pressure higher than a certain level in the nozzle, so that a high voltage is generated in the ignition device and the ignition is caused by the spark of the ignition electrode.
6) Step: At the moment of ignition, the flame detector detects the flame light, shorting the input voltage of the ignition device.
7) Step: If the above steps 1) to 6) are performed, ignition is continued and the cooling water starts to be warmed.
8) Step: When the coolant temperature rises to 75, the water temperature sensor detects this and stops the fuel injection by short-circuiting the fuel valve power at the control unit.
9) Step: The fuel is not injected and air is supplied for a certain period of time to burn the residual fuel.
10) Step: When the coolant temperature drops to 65, the water temperature sensing controller senses this and the drive motor is operated again and ignition is performed.
The method comprising the steps of:

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