General information about the toxicity reduction system (Hyundai Elantra XD)

The fuel injection system operates based on a pulse sequence and air flow measurement. The system ensures that the optimal composition of the fuel-air mixture is supplied to the engine cylinders. The air intake system and fuel injection system work together with the electronic engine management system. All sensors and switches are connected to the ECM, which processes the incoming data and calculates the valve timing and the duration of the opening of the electrically controlled fuel injectors.

The main requirement for optimum fuel delivery is determined by the data supplied to the ECM from the mass air flow sensor. Other sensors and switches are used for the following measurements:

coolant temperature;
engine crankshaft speed;
oxygen content in exhaust gases;
determining the position of the top dead center of the piston of the first cylinder in the compression stroke.

Location of exhaust gas toxicity control and reduction system components in the engine compartment of vehicles with 1.6 l and 1.8. 2.0 l engines

1 - manifold absolute pressure sensor (MAP); 2 - Intake air temperature sensor (IAT); 3 - coolant temperature sensor (ECT); 4 - Throttle Position Sensor (TPS); 5 - Camshaft Position Sensor (CMP); 6 - Crankshaft Position Sensor (CKP); 7 - heated oxygen sensor; 8 - injectors; 9 - Idle Speed Modulator (ISA); 11 - knock sensor; 12 - Locking switch; 15 - air conditioning compressor relay; 16 - Fuel Evaporative System Solenoid Valve (PCSV); 17 - control relay; 18 - ignition coil

Location of exhaust gas toxicity control and reduction system components in the vehicle interior

10 - Vehicle Speed Sensor (VSS); 13 - ignition switch; 14 - ECM; 19 - Diagnostic connector (DLC)

1, 2, 4, 9

General information about the toxicity reduction system

5, 18

15, 17

Various sensors and switches inform about any changes in operating conditions and send corresponding signals to the ECM. This allows the ECM to regulate the duration of the injector opening and maintain the optimum mode for reducing the toxicity of harmful substances in exhaust gases and the engine operating mode under various vehicle operating conditions.

To reduce emissions of harmful substances into the atmosphere along with exhaust gases, the following exhaust gas toxicity reduction systems are used: