1. RED4 TESTER INSTRUCTION
1. Introduction:
With the development of electronic technology and people to improve vehicle
emissions target, a new type of diesel engine high-pressure pump is going into the
market in a growing number, which is electronically control high pressure diesel
pump. The difference of this kind pump with the past mechanical high-pressure pump
is regulating mechanism and pre-stroke adjusting mechanism. Ordinary mechanical
pump uses flyweight and its centrifugal force to realize regulating speed. However,
pre-stroke realizes it by adjusting the gasket. Electronically control high-pressure
pump achieves speed regulating by using electromagnets or DC motor. Signal size can
change amount of fuel injection. Pre-stroke realizes function by increasing control set
on plunger or solenoid valve control cavity pressure (VE pump), which is also entirely
controlled by signal size. Here, we only introduce electronically control high pressure
line pump structure, principles and maintenance.
2. Structure and working principle of RED4 governor
Electron speed regulator on electrically control line pump mainly has 2 kinds: RED3
and RED4. Diesel Machine Co., Ltd of Japan has introduced RED3 electron speed
regulator which is used on inline type synthesis pump s early as 1983. Thereafter, they
developed RED4 type electron speed regulator.
RED4 type electron speed regulator can be variable speed governor, polarized governor, or a
combination of both types. Type of work unit within the conversion process is determined.
Therefore, RED4 electronic governor as a general-purpose electronic governor, when
applicable, can be applied to trucks, buses, power generation equipment,
engineering machinery and fire vehicles and other occasion.
RED4 electronic governor is the main constituent parts: housing, actuators, and cover.
Relative RED3 electronic governor system, RED4 type governor control circ uit,
servo circuit, driver circuit, sensing circuit - arranged in the governor's
executive body, the outside noise is very small.
Electronic Control Unit is equipped with a RED (RED3 or RED4) series of

2. electronic governor ’s line pump system, through computer-controlled direct fuel
injection pump diesel engine volume. The system is characterized by: to ensure straight pump
diesel engine, low fuel consumption, and can improve diesel engine emissions.
RED4 electronic governor control section can be divided into three parts: the input unit,
calculation unit and drive unit.
1) Input unit
The various sensors and switches the output of information into the control unit, the calculat ion of
information processing, information provided to the calculus as the basic unit.
2) Calculation unit
In the calculation unit to input information based on data from the ROM and compare the
calculation process and the final result of information as the executing agency of
the control information output drive unit.
3) Drive unit
Drive unit to the actuator control information (information about the target gear shift lever)
into the actuator driver information, the executing agency action, the gear lever position
sensor control, and always make the same target. The conduct of a series of continuous process,
so you can always guarantee the best fuel injection engine in the state. RED3 and RED4
comparison of electronic governor
1. Control System Comparison
Relative RED3 electronic governor is, RED4 electronic governor servo circuit, drive circuit and
sensor circuits are arranged on the inside. After receiving informat ion from the servo circuit,
after processing, linear DC motor drive.
For the specific meaning of terms and codes are as follows:
PWM: pulse width modulator (pulse width modulator)
Duty Cycle: The cycle of a pulse signal, ON proportion of the signal
Visit: actual gear lever position voltage
Digital: The representation of continuous physical data
CPU: central processing unit
Servo circuit: the so-called tracking servo is, the target and actual values are compared, their
difference as a correction circuit

3. Drive circuit: the output of the linear DC motor rotation informat ion of the circuit Sensor
circuits: dealing with the displacement from the gear lever to get the information of the
circuit
2. RED4 electronic governor ’s main components are: After the shell, the actuator and housing.
1 actuator
By the linear DC motor actuators, the movement passed to regulate tooth rod connecting rod,
adjust the gear lever position detection sensors and other components.
2 linear DC motor
Linear DC motor from the cover, magnet, coil assembly and electrode
composition. Magnet form the magnetic field, the cover is to effectively guide the magnetic field
to form a magnetic path. Magnetic field coil assembly of the wires in the power, through
interaction, to accept the force up and down movement.
3. Stop the oil lever
Stop oil through the actuator handle is installed on both sides of the shaft.
Connection pivot center to be processed into an oval shape, which stop on the shaft of the nut oil.
In oil handle non-stop action position, stop the oil rod nut does not prevent the action.
4 gear lever position sensor
Gear lever position sensor installed in the upper part of the governor, the target
position relative to the detection of tooth-conditioning are in the correct position. Gear lever
displacement sensor chip by the E-shaped, two groups of coils and copper components. Install a
copper rod in the regulation of gear end, and the other fixed on the E-shaped chip.
5 Speed Sensors
Speed sensor is the role of detection and control of essential parameters - engine speed, mainly
by the electrodes, coils and magnets.
Work
1 actuator
Linear DC motor according to the servo circuit from the regulator output driver information so
that the coil assembly moves up and down Installed in the connecting rod within the
coil assembly, the coil assembly moves up and down regulation delivered to the gear lever
mounted on the end of the connector, so adjust the gear lever and move around to adjust the fuel

4. injection quantity. Therefore, if the upward movement of the coil assembly, then
adjust the gear lever to increase the oil's move; the other hand, if the
downward movement of the coil assembly, then adjust the gear lever to reduce the oil's direction.
Its working principle is to move up and down motion of the left lateral movement.
In the regulation of gear lever upper end of the connector installed in a copper, as part of the
sensor gear lever. By the gear lever gear lever sensor detects the actual position of adjustment, the
control unit to provide feedback control. Control unit is always kept relatively calculus
target and actual position, and keep the difference as to the "0" Pull the gear lever adjustment.
Therefore, the gear lever sensor accuracy, response is very important.
2 linear DC motor
Linear DC motor works and the same rotary motor, the current "I" flows
through the magnetic field "B", the force "F" work. The amount of the
relat ionship between the subject left hand rule, thumb pointing to the force "F" direction, the
middle finger pointing to the magnetic field "B", then the index finger is the current
"I" direction. In the "B" in the middle of the current "I" point to the middle finger, then
"F" to point the thumb. The size of the force generated through the wire and
the magnetic field strength, size and current flow in direct proportion to the length of the wire.
Linear DC motor driving method is used Jie Kese's degree special
electromagnetic switching method, the driver circuit, so that the coil assembly, set up and down
movement of the switching circuit in which, with a frequency control switch circuit.
When the coil assembly is in equilibrium when the upward signal and
downward signal ratio of 1:1. But. Rise or fall, should control the rising signal and falling signal to
change the ratio of duty cycle. By changing the duty cycle, you can adjust the velocity of the coil
assembly.
Thus, inhibition of the electromagnetic switch coil heating mode, response is very good.
Description: The so-called duty cycle is a cycle by changing the pulse ON-OFF cycle of the signal
than the control. Namely:
Duty Cycle = ON time / (ON time + OFF time) * 100%
3 gear lever position sensor

5. Relative to the magnetic field generated by the coil, if you set the copper, the eddy currents
generated within the copper, copper eliminat ion from the previous field. Therefore,
due to changes in copper position was eliminated will change the magnetic field strength, on-line
back-EMF generated by the circle will also change.
On the other hand, copper coil and set temperature compensation, correction due to the voltage
caused by temperature changes. Thus, from the two coil voltage change ratio (the
ratio of the reactionary trend) were found to adjust the gear lever position, eliminate
errors caused by temperature, improve the accuracy.
4 Speed Sensor
Installed on the camshaft gear rotates on the sensitive, the output from the
speed sensor in the magnetic field in the sensitive Ministry raised the gear will change. Changes in
the magnetic field produces a small circle line voltage, the voltage changes as the speed signal can
be detected.
5. Stop the oil lever
Speed in the common state, to stop the oil does not hit the bolt hole oval face.
Therefore, the adjustment gear to stop the oil rod bolts with the freedom of
movement without any relationship. Stop will stop the oil into the oil side of the handle, the
oval hole to stop the oil bolt hit the end, connecting rod work. Therefore,
the gear lever is pulled to adjust the direction of non-fuel injection, the engine stops the oil. In this
way, adjust the gear lever is in no matter what kind of position, the handle can force the oil to stop
the engine stops running.
三, the electric pump testing and maintenance
1 governor test
RED3 and RED4 structure is basically the same, the first governor to open the lid to see whether
the sludge and other contaminants which, if the cleaning, hand moved up and down the linear
motor slider to see if there are stuck and so on.
Connect RED4 governor and RED4 control box, manual adjustment of the
throttle according to size, view sensitive rack position change should be smooth.
2 pump test
The main test plunger for wear, camshaft for wear, etc., if it should be replaced.

6. 3 oil pump test
On the high pressure pump test bench, connected RED4 control box and pump, according to the
value of each fuel injection pump fuel injection pump to adjust the volume, start the test bench
watching the fuel injection quantity, if inconsistent to make adjustments,
adjustment method and the ordinary mechanical pump the same.This products can adjust all kind
of the RED4 Eletronic speed device in-line pump made by Japan Zexel Company. The
functions and charateristic of the controller as well as the testing data are completely same as the
original one. The product adopts the wide output power switch, high-speed AMP7 main
control Chips, integrated Circuits, can finished all the RED4 adjusting functions.
The highly integrated products, reliable performance, is the the idea RED4 electr onic
speed governor.
1. Technical Data
1. Eletronic Power: 220V 50HZ
2. Output Power: ＜200 W
3. Data display: Light Four digital Nixietube
4. Control Range: 5%-95%
5. Precision : ±0.1%
6. 4 Pre-set : 5%, 16.25%, 72.5%, 95%
2. Button Instructions:
1. “ Select” Button: When the corresponding indicator light turns off, press
“↑” “↓”button to adjust PWM value “5%-95%”; while the corresponding indicator
light turn on, press “↑” “↓”button to choose 4 kinds of pre-set : 5%, 16.25%, 72.5%, 95%
2. “ RED4 POWER”: The Oil ajusting speed device switch, when it light effective.
3. “ Limp home” Fixed speed switch, while the lamp light, PWM value is “95%”
4. “ Pull Down” switch, When the lamp light, PWM value is “5%”
5. “ Menu” “ Enter” Menu Operating: it can change the controller and run the program. Before
left factory, all the data have pre-set well, don’t change it by any way, and leads to abnormal
usage.
3. Usage Instructions:

7. Connect the oil pump adjusting speed device through the cables along with
test EDC itself, Open the power switch, then open “ RED4 Power”, the
corresponding indicator lamp will be light, display will show “ 00.00”, it can
adjust the throttle up and down through the arrow “↑” “↓”. Close the “ RED4
POWER’ switch, oil pump power off.