© Aixro GmbH / Woelfle Engineering GmbH
10/23
4.7. Data Acquisition
While driving you should monitor and record different parameters. There are several good
and very refined systems on the market nowadays, e.g. made by Alfano, AIM or Unipro. The
most important parameters for the engine are:
4.7.1.
Engine Speed
The maximum engine speed shows you whether you have chosen the correct transmission
ratio. Your maximum engine speed should be just less than the (limited) maximum engine
speed of 10400rpm (10800rpm with ceramic apex seals). Also you should keep an eye on
the idle speed and the speed, at which the clutch engages.
1.
Mount the sensor to the ignition cable according to the manual of the manufacturer,
and attach the sensor and the ignition cable, so both cannot make contact with moving
parts or the ground.
2.
Though the XR50 is a 4-stroke engine, it ignites with every engine revolution like a 2-
stroke engine. Therefore your system should be set to “2-stroke”.
4.7.2.
Water Temperature
The water temperature provides information on the engine load and the radiator capacity.
While you are driving, the temperature should be 65..75°C (150..170°F). The sensor should
be mounted close to the engine in the hose, which connects the engine with the radiator.
1.
Use an adapter suiting the sensor and the hose.
2.
Cut the hose, which connects the upper engine connector with the radiator, close to the
engine.
3.
Insert the adapter, and secure it with hose clamps.
4.
Insert the sensor in the adapter and secure it.
5.
Attach the sensor and the sensor cable, so both cannot make contact with moving
parts or the ground.
4.7.3.
Main Bearing / Transfer Port Temperature
The temperature of the fuel-air-mixture in the transfer port of the side inlet provides the most
valuable information about the engine, especially the main bearing. You will discover that the
temperature increases with engine speed and quickly drops again under braking. This means
you get very quick feedback on the engine load and the strain of the main bearing.
Use a quickly responding temperature sensor (K-type) with a M5 thread, e.g. AIM M5 Ex-
haust Gas Temperature (EGT) Sensor, Alfano A-278.
1.
Ensure that the engine is absolutely clean in the area of the screw, which is located
next to the inlet manifold in the ignition side plate (engine housing).
2.
Remove the screw.
3.
Insert the sensor. Make sure the sensor the sensor protrudes the end of the thread by
approx. 10mm, and that the sensor locks the housing airtight.
4.
Connect the sensor as described by the manufacturer.
5.
Attach the sensor and the sensor cable, so both cannot make contact with moving
parts or the ground.
! Double-check that the position of the sensor is right. If it protrudes the thread much
more than 10mm, it can make contact with the rotor. If it does not stick out far enough,
you will not get feasible results.
! Make sure the attachment is airtight. If the engine can pull air from the sensor area, it
will run too lean and can get damaged.
Содержание XR50
Страница 1: ...OPERATION MANUAL...
