Crank-Angle-Resolved Engine Model

This example shows a 2.0-liter, four-cylinder, naturally aspirated spark-ignition engine that computes crank-angle-resolved torque. A starter motor starts the engine, which is also connected to a dynamometer, before combustion takes over the engine operation. The engine torque can be controlled by varying throttle, air-fuel ratio, and spark timing.

Model

Engine Subsystem

Simulation Results

The plot below shows the engine speed. First the starter motor starts rotating the engine crank, and then combustion starts at 2 seconds. During simulation, air-fuel ratio, throttle and brake torque are varied.