Injection valves – checking and repairin

The requirements to the car constructors are worldwide higher to reduce the exhaust emission, to improve the fuel economic, to increase the engine power, to reduce the maintenance and the repairing costs.
Only when all components of the lambda regulated fuel injection system work most favourable these requirements can be fulfilled. The favourable combustion of the fuel/air mixture in the engine is depending on the perfect working of the injection valves. You can only realize a favourable combustion if the injected fuel in the combustion chamber at all cylinders over the total engine speed and the load range with view to the jet shape, jet angle, distribution, spraying and fuel quantity will be absolutely linear.
In the daily use of the car there are deposits in the injection valve which are on the surfaces – f.e. on the filter strainer, needle valve, needle head and injection seat. There are due to chemical impurities in the fuel and the fuel itself (additives) .
After turning off the engine the heat of the engine causes the drying of the fuel leading components and so again there will be residues. They burn in the nozzle elements and impair the function of the injection valves. More exhaust emissions, a higher fuel comsumption and a worse engine power are the results.

Until now there are no inspection regulations for injection valves from the car industry. This will be changed shortly, as some producers are occupied with this problem.
At the moment 99 % of the garages do not have the necessary inspection- and service technic – ASNU. The garages can only find resulting damages like damaged lambda detectors and catalysts.
The main reason – the not perfectly working injection valves will not be found.

ASNU-Injection valve diagnosis and service Direct injection nozzles

ASNU-Injection valve diagnosis and service Direct injection nozzles