Overview The catalytic converter is designed to reduce, by catalysis, unburned pollutant gases at the exhaust: • CO: carbon monoxide • HC: hydrocarbons • NOx: nitrogen oxide Catalysis is a phenomenon which, by using a catalyst, encourages chemical reactions without the catalyst itself being involved in the chemical reaction. As it deals...

The carbon canister contains an active carbon filter. It is located between the fuel tank and the canister bleed electrovalve and is located in the Saxo driver's side wing (RHD). The fuel vapours in the fuel tank are absorbed by the active carbon. This aim of this function is to prevent: • the pressure rising in the fuel tank, • vapours...

This sensor is of Hall effect type and is located on the gearbox output. It is supplied with +12 V. .. This sensor transmits information which, along with the engine speed, is used to determine the gear engaged. This information is used to: • improve driving pleasure (engine hesitation),

The throttle potentiometer is located on the throttle housing. Supplied with +5 V by the ECU, this potentiometer transmits a variable voltage to the ECU which is a function of the position of the throttle (driver's wishes). This information is used for recognising no load and full load positions and transitories for acceleration,...

The main supply to the system is by means of a double relay, which provides 3 operating states: • ignition off: − the power to some system components such as: . the injectors, . the ignition coil, . the fuel pump, . the canister bleed electrovalve, . the oxygen sensor heating resistors, . the air pump relay (specific to ifL5 depollution),...

The engine speed sensor consists of a magnetic core and a winding. It is positioned opposite a ring on the flywheel with 60 teeth, 2 of which have been removed in order to determine the TDC (top dead centre) position. When the teeth of the flywheel pass in front of the sensor, a variation in magnetic field is created. This variation...

The injectors are of twin jet type. They are supplied with +12 V via the double multifunction relay. The ECU controls the injectors separately by earthing them in the firing order 1-3-4-2 when the inlet valves are closed. The amount of fuel injected depends on the injector opening time (called the injection time). Pulses from the...

The ignition is of twin static type: BBC2.2 (Compact Coil Unit and no HT leads). The compact coil unit consists of 2 coils with 2 HT outputs. It is located directly above the spark plugs. Each coil consists of a primary winding linked to a secondary winding. Each secondary output is connected to a spark plug. This technology improves ignition...

Overview The piezo-electric type knock sensor / pinking sensor is mounted on the rear of the engine block. This sensor is used to detect knock (vibrations caused by the mixture detonating in the combustion chamber), often caused by pre-ignition. This phenomenon, if repeated, can destroy mechanical parts due to an abnormal rise in temperature...

Overview The inlet air pressure sensor is a new generation sensor and incorporates the inlet air temperature sensor. The inlet air pressure sensor constantly measures the pressure in the inlet manifold as well as the temperature of the engine inlet air. It is supplied with +5V by the ECU when the ignition is switched on. Inlet air...