SOFT-ENGINE: INERTIAL IMAGES

The following windows is about the basic data input for a road simulation test. Choose the option "Road" and fill the following textboxes with suitable values:

Inclination angle, Vehicle mass (+rider), Air resistance coefficient Cx, Front surface (+ rider), Roller resistance coefficient..

Input data window for a road simulation

By these data the software computes a resistance load to give to the eddy current brake. This load is "quadratic", so the corresponding resistance horse-power is "cubic". Because of the load was computed according to the track parameters, the red horse-power curve keeps in consideration the road conditions (frictions and aereo-dynamics). This is a truthful road simulation horse-power. We verified the HP measured at bench is quite similar to the track conditions because the times (at bench and on the road) are the same. Obviously, this test is possible also to measures an engine horsepower (by a deceleration test).

"Inertial and Braker" combined test: Wheel HP and resistance HP (car)

"Inertial and Braker" combined test: Wheel HP and resistance HP (motorcycle)

The "quadratic" load (=the "cubic" resistance horse-power) keep in considration the track frictions and the vehicle aereo-dynamics. This truthful road simulation becomes a complete test if the engine is cooled by an air travelling at the same vehicle speed: so in a dynamometer tests, the fan system has to give an air speed variable with the drum velocity. See our "AIR BOX ONE" variable-air-speed optional fan system for more info.

	ROAD SIMULATION TEST ("COMBINED" INERTIAL-BRAKED TEST)


By this test it is possible to strain the engine with a constant or variable load, while the vehicle is accelerating on the drum, like in an accelerative test. It's possible to make also a "combined" inertial and braked test, to arrange a road simulation. In all cases, the load is calculated by the software and imposed by the eddy current brake. The three different options are: 1) CONSTANT LOAD: the resistant torque law is constant and the resistant horsepower diagram is linear. This is the method you have to use when you like to simulate the weight of a passenger or a climb on dynamometer. 2) VARIABLE LOAD: the resistant force is a "quadratic" law and consequently the resistant horsepower is a "cubic" law. This is the test you have to use when you like to do a "road simulation", because the quadratic laws simulate the effective road frictions and aereodynamic resistance. 3) "COMBINED" TEST: this is the test to do for a "road simulation".