The common rail injection system of the new DAF MX 300 engine allows high injection pressures of up to 2,500 bar and pre-injection and post-injection or a combination of both. This leads to finer atomization of the fuel and many other opportunities to optimize combustion and ensure the lowest emissions, noise and fuel consumption. In combination with the SCR system, which additionally processes emissions, maximum fuel combustion is achieved with significant fuel economy.
In order to increase the reliability of the DAF MX 300 engine, it was decided to reduce the number of components, because the fewer components, the less the likelihood of unit failure. Namely, the oil circulation is improved, low-pressure fuel lines are built into the injection pump housing, foam materials are used to damp electrical wiring vibrations, a large bearing and crankshaft are reinforced – this and much more contributes to an increase in the durability and reliability of the motor.
Major engine innovations
Fuel injection system:
- injection system with electronic pump (EUP);
- pumping units with integral solenoids to reduce vulnerability.
Injectors:
- SMART with different needle opening pressures.
Injection adjustment:
- fine tuning of multipoint injection.
Intake system:
- turbocharged and air cooled;
- internal cooling.
Intercooler:
- aluminum, single row transverse.
Turbocharger:
- one-stage with controlled non-return valve.
Explanation of DAF MX 300 markings
| MX | 12.9 liter engine family |
| 300 | Engine power, kW – 300 |
Specifications
| Manufacturer | DAF |
| Also called | MX 300 |
| Configuration | inline turbocharged diesel |
| Number of cylinders | 6 |
| Firing order | 1-5-3-6-2-4 |
| Piston stroke, mm | 162 |
| Cylinder bore, mm | 130 |
| Displacement, cc | 12900 |
| Power output, hp | 410 |
| Compression ratio | 17,7:1 |
| Torque output, Nm / rpm | 2000 |
| Euro standards | Euro 5 |
| Weight (dry) | 1200 kg |
