Installation & Testing Series Videos of Limbach L550E Engine(Ⅱ)

Jul. 17, 2023

Welcome to watch the teaching video series on installation and testing of the Limbach L550E engine. In this episode, we will introduce the calibration of the servo transmission device (servo) stroke of the engine throttle, the calibration of the use of photoelectric sensors, and the adjustment of the temperature sensor position.

This series of videos is suitable for WF-EN-series engine test bench, support custom service, welcome to contact us.

Power on the test bench

Connect one end of the test bench adapter to the test bench and the other end to a 220V power socket.

After powering on, when you hear "drip, drip, drip", the indicator light changes from yellow fast flashing to blue slow flashing, indicating that the device has successfully powered on.

Connect the network port end of the data cable to the test bench.

Open the MET Software.

Connect the USB end of the data cable to the computer, and the device emits a "beep" sound.

The software automatically connects successfully (if it is the first time to connect the software, you need to manually select the port com in the software to connect.)


Servo transmission device (servo) stroke calibration of engine throttle

First, power on the steering gear.

Click on "Unlock" on the software.

Manually adjust the throttle valve to the "fully closed" state and keep the throttle valve fully closed. Install the steering gear rocker arm onto the steering gear.

Tighten the steering gear rocker arm

On the software, slowly drag the throttle.

The steering gear slowly changes with the throttle until the throttle is in a "fully open" state.        

The software records the PWM value corresponding to this throttle position as 1417us. Click on "throttle lock" to enter the software configuration system settings interface. Change the maximum PWM value to 1417us, click on "Set", and the system settings interface will be closed successfully. Click on "Unlock" and drag the throttle bar from 0% to 100%. At this point, 0% throttle corresponds to the throttle valve being "fully closed" and 100% throttle corresponds to the throttle valve being "fully open".

Complete the calibration of the servo stroke


Calibration of Photoelectric RPM Sensors

Stick the reflective sticker to the position where the photoelectric sensor beam is focused on the propeller (usually at the root or middle of the propeller), ensuring that the beam always lands on the reflective sticker when it touches the propeller.  The distance between the focusing lens of the photoelectric sensor and the reflective sticker is 3-5 cm.  Rotate the lens, adjust the beam focus to a point, and then fix the lens.    

Enter in the main interface of the software, find the setting(S) interface and fill in the number of photoelectric stickers in the number of blades column (reflective stickers are pasted on each blade), and click on set button in the system setting.

Move the beam of the photoelectric sensor away from the propeller and aim it at the non sensing surface (air).

Open the cover of the sensor debugging, press the SET button once, and the sensor will display SET.

Move the beam of the photoelectric sensor onto the reflective sticker of the propeller.

Press the SET button again to complete the setup.

Photoelectric sensor calibration is completed.


Adjust the position of the Temperature Sensor

The test bench adopts an infrared detection temperature collection method, aligning the mirror surface of the infrared sensor parallel to the root of the engine cylinder block at a distance of 1-3cm. Pay attention to keeping the mirror clean and avoiding oil stains from blocking it.

Temperature sensor adjustment completed.

All sensors have been calibrated and debugged (other sensors have been calibrated and debugged before shipment, and there is no need to calibrate again).

Thank you for watching the sensor calibration and debugging video!

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