1. Engine air temperature sensor
2. Air flow meter
3. Pressure regulator
4. Throttle potentiometer
5. Crankshaft sensor
6. Stepper motor for idle speed control
7. Camshaft sensor
8. Knock sensor
9. Fuel vapor recovery system
10. Ignition unit
11. Coolant temperature sensor
12. Exhaust gas re-burning system
The Simtec 56.5 fuel injection system is identical to the Multec-S system installed on 1.6 L DOCH engines. The only difference between the systems is that an air flow meter is installed instead of an absolute pressure sensor in the intake manifold.
An additional feature of the Simtec system is that the air supply path to the engine has a variable length in order to guarantee maximum efficiency at high engine speeds and maximum power at low engine speeds. The intake manifold is divided into two paths of different lengths. Each path of the intake manifold is equipped with a valve. The valve is controlled by the ECU via an electromagnetic valve and a vacuum diaphragm.
At engine speeds below 3,600 rpm, the valves remain closed and the air entering the engine must travel along a long path, resulting in increased torque.
At higher engine speeds, the ECU switches the solenoid valve and vacuum acts on the diaphragm, which opens a short path for air to enter the engine.
Visitor comments