Automative engine simulating apparatus

Apparatus for simulating the operating characteristics of an automobile engine comprising:

• starting means for electrically simulating the ignition system of the engine;
• means for generating an electrical signal representative of engine revolutions per minute under various engine operating conditions;
• control means for controlling the signal generating means, the control means simulating a transfer function derived for the engine;
• speed means for simulating engine acceleration and deceleration;
• sensor simulating means for simulating the operation of an oxygen sensor normally positioned in an exhaust system of the engine and for generating an electrical signal representative of an output signal supplied by the oxygen sensor;
• first servo simulating means for simulating the operation of a first electromechanical device controlled by an automobile engine control system;
• and
• second servo simulating means for simulating the operation of a second electromechanicl device controlled by the automobile engine control system whereby the apparatus is useful for testing and calibrating a feedback and automatic idle speed control system for the automobile.