COMMON RAIL INJECTOR TESTING FACILITIES USING THE FIP TEST BENCH        

AS YOU CAN SEE FROM OUR PICTURE ON THE FRONT PAGE WE HAVE NOW INVESTED IN OUR NEW COMMON RAIL TEST BENCH FACILITIES IN OUR WORKSHOP TO TEST MODERN DIESEL INJECTORS OF SOLENOID & PIEZO TECHNOLOGIES .



The Common Rail Diesel Injection System Explained

In recent years, more and more drivers have been drawn to diesel-powered vehicles. Bosch ,Siemens ,Delphi & Denso have & will play a major role in this European & now World Wide diesel boom. The modern high-pressure injection system, Unit Injector and Common Rail have transformed the ponderous, smoke-belching slowcoaches of yesterday into the sporty, fuel-efficient and clean automobiles of today.

The Common Rail system in particular gives engine developers the freedom they need to reduce exhaust emissions even further, and especially to lower engine noise. The particular design of Common Rail, with its flexible division of injection into several pre, main and post-injections, allows the engine and the injection system to be matched to each other in the best possible way. In the Common Rail accumulator injection system, the generation of the injection pressure is separate from the injection itself. A high-pressure pump generates in an accumulator – the rail – a pressure of up to 1,600 bar (determined by the injection pressure setting in the engine control unit), independently of the engine speed and the quantity of fuel injected. The fuel is fed through rigid pipes to the injectors, which inject the correct amount of fuel in a fine spray into the combustion chambers. The Electronic Diesel Control (EDC) controls extremely & precisely all the injection parameters required to run a modern diesel engine efficiently as possible.

Here we have a Volvo engine using the Bosch Common Rail Diesel Pump & Injectors.




In the 1st and 2nd generation of Bosch's Common Rail, the injection process is controlled by a magnetic solenoid on the injectors. The hydraulic force used to open and close the injectors is transmitted to the jet needle by a piston rod.We have now moved on to  the 3rd generation of Common Rail for passenger cars, the injector actuators consist of several hundred thin piezo crystal wafers. Piezo crystals have the special characteristic of expanding rapidly when an electric field is applied to them. In a piezo inline injector, the actuator is built into the injector body very close to the jet needle. The movement of the piezo packet is transmitted friction-free, using no mechanical parts, to the rapidly switching jet needles. The advantages over the earlier magnetic and current conventional piezo injectors are a more precise metering of the amount of fuel injected and an improved atomization of the fuel in the cylinders. The rapid speed at which the injectors can switch makes it possible to reduce the intervals between injections and split the quantity of fuel delivered into a large number of separate injections for each combustion stroke. Diesel engines become even quieter, more fuel efficient, cleaner and more powerful. 

Here at  WMM Ltd we can now test all diesel Injectors of Pintle & Common Rail design and can rebuild, recondition & supply new injectors to your requirements.


Bosch EPS diesel testing available £20.00 + vat per injector & comes with a complete detailed print out with every injector included in the price.




PLEASE DO NOT HESITATE TO CALL OR VISIT US SHOULD YOU HAVE ANY DIESEL PROBLEMS OR ENQUIRIES THAT WE CAN HELP YOU WITH ON INJECTOR REMOVAL,TESTING OR EXCHANGE.