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High-pressure unit injectors for Scania 9-, 11- and 16-litre engines
A Scania engine develops high torque, returns good fuel economy and generates low exhaust emissions. Achieving such high levels of performance along with easy driveability requires advanced combustion technology. There has to be a fine balance of all parameters that create the right conditions for optimised output. Part of that balance concerns the volume, timing and pressure of fuel injection.
Precision that gives consistent, economic performance
With unit injectors, the engine always has exactly the right amount of fuel introduced at exactly the right moment, with exactly the right pressure. Combustion in each cylinder is individually controlled, by varying the start and end of the injection process – thus minimising fuel consumption and emissions.
Precision that makes a difference for the driver
When manoeuvring in traffic or at a loading bay, engine speeds are more stable. The use of equipment driven by a PTO is also made more convenient because it will be easier to control.
Reliability that’s based on simplicity
Each unit injector has its own integral high-pressure pump, individually controlled at the point of injection. There is no need for a centralised high-pressure pump and a complex arrangement of pipes to each injector.
This in turn means that the system is inherently more reliable than any previous technology. Should a malfunction occur, it will almost certainly be present in only one cylinder. This means that a truck is very unlikely to be disabled. Function testing using built-in diagnostics takes no more than seconds and can be completed by a Scania technician at the roadside if necessary. |