Patent ID: 8027776

Claim:
A method for experimenting engine control parts, wherein various engine control parts, which are actually attached to an engine and are necessary for engine control, are constructed in a state where electrical transmission and fuel supply are enabled in a manner similar to a case where the engine control parts are mounted on an actual engine, and model-based control is performed using numerical formulas indicated below on the same conditions as those of the actual engine, on the basis of experimental data of the actual engine written in an electronic control unit constituting one of the engine control parts, [ x . 1 x . 2 ] = [ x 2 a 1 ⁢ x 1 + a 2 ⁢ sign ⁡ ( x 2 ) + a 3 ⁢ x 2 ] + [ b 1 b 2 ] ⁢ U a y = x 1 In the above state equation, a 1 = - K s J a 2 = - d k J a 3 = - ( D J + N 2 ⁢ K t ⁢ K e R a ⁢ J ) b 1 = 0 b 2 = NK t R a ⁢ J ⁢ ⁢ and , y is an observation value, (where U a is the input voltage of both ends of an armature, R a is the resistance of the armature, K e is an induced voltage constant, N is a gear ratio, J is the total moment of inertia in terms of a throttle axis of a system, D is a viscous frictional coefficient, d k is Coulomb friction, K s is the spring constant of a return spring, K t is a torque constant, a 1 , to a 3 and b l and b 2 are constants, and x 1 and x 2 are state variables).