Fuel System Specifications Technical data Name Technical requirements Fuel tank 55 l Fuel filter High pressure Fuel pump Electric, installed in the fuel tank The pressure of the fuel supplied to...
Characteristics of the injection system Characteristics of conventional injection system In conventional fuel injection systems with distributor and direct injection pump, the injection system includes only...
Pilot fuel injection Control injection of fuel can be made in the position of the crankshaft 90°to TDC. If the start of fuel injection occurs less than 40°BTDC, fuel can be deposited on the...
Main fuel injection The energy needed to run the engine comes from sequential main fuel injection. This means that, in essence, the main fuel injection provides the engine crankshaft...
Additional fuel injection On some versions of NOx catalytic converters, post-fuel injection can lead to NOx afterburning. This causes the main fuel injection to continue for 200°after TDC during...
Reducing the toxicity of exhaust gases Fuel mixture formation and combustion process injection pressure; injection time; aerosol spread (No. of atomizer, spray jet profile, spray jet direction); the moment of...
Common rail fuel system Common Rail Fuel Injection System 1 - high pressure fuel pump; 2 - fuel filter; 3 - a fuel tank with a preliminary fuel filter and a booster fuel pump; 4 - ECU; 5 -...
EDC control system The common rail EDC diesel engine control system includes three large systems: 1. Sensors for recording operating conditions, which convert various material parameters...
Engine control unit (ECU) The ECU evaluates the signals received from external sensors and limits them to an acceptable voltage level. Based on the input data and characteristics stored in the...
Controlling the maximum amount of air entering the engine There are many following reasons why a large amount of fuel should not be injected into the engine cylinders (or the maximum physically possible): excessive emission of...
Engine shutdown The diesel engine works on the principle of self-ignition of fuel, so it can only be turned off by cutting off the fuel supply. With diesel electronic control system...
Removal and installation of the nozzle The fuel system operates at high pressures (1350 bar). Do not carry out any work on the fuel system while the engine is running or within 30 seconds after it has...
High pressure fuel pump installation The fuel system operates at high pressures (1350 bar). Do not carry out any work on the fuel system while the engine is running or within 30 seconds after it has...
Air flow meter (Air flow sensor – AFS) Heated thin film air flow meter whose micromechanical measuring system registers the air flow and its direction. The engine intake air temperature sensor is built into...
Coolant temperature sensor (ECT) The coolant temperature sensor is installed in the cylinder head and monitors the coolant temperature and sends a signal to the ECU. A thermistor is used as a sensor,...
Camshaft position sensor (CMP) The camshaft position sensor generates pulses at the TDC of the 1st and 4th cylinders on the compression stroke, based on which the ECM determines the fuel injection...
Crankshaft rotation angle sensor The position of the piston in the engine cylinder is decisive in determining the timing of fuel injection into the combustion chamber. Since the pistons are rigidly...
Injectors — function test The Common Rail system uses special injectors with hydraulic boost and an electric start element (solenoid valve) to ensure that the correct amount of fuel is supplied...
High Pressure Accumulator Fuel Pressure Sensor (RPS) The sensor measures the instantaneous fuel pressure in the high pressure accumulator and sends a signal to the ECM. Pressurized fuel through the hole acts on the sensor...
Fuel Temperature Sensor (FTS) The thermistor with a negative temperature coefficient is used as the main element of the fuel temperature sensor (NIC), which is part of the voltage divider circuit....
Pressure control valve The fuel pressure in the accumulator is maintained at the required level by a pressure control valve. The pressure regulating valve performs the same function as the...
Troubleshooting Troubleshooting the fuel system sign Probable Cause Elimination Method Engine won't start The crankshaft of the engine is turned by a starter slowly Repair the engine...