The injection process occurs extremely fast and because the actuator can be activated and deactivated so quickly, piezo injectors are known for their superior reliability, increased durability, efficiency and reduced emissions. When the Piezo actuator is de-energized, the valve closes and high pressure fuel forces the needle to return to the closed position. (change of injectors, Rough run test sequence) this part is not necessary. Connect the 20/60 A current clamp (TA189) to Channel A on PicoScope and link the clamp around the signal wire of the number 1 injector. Megger tests of Diesel Injectors, Solenoid burn out, Piezo activity on a first look SensorPiezoelectric. Leaking of piezo injectors during the cold start is one of the most popular. With no pressure at the top of the needle, it springs open, allowing fuel to be injected into the combustion chamber. Piezo and Solenoid Common Rail Diesel Injectors testing to destruction - YouTube. When the Piezo crystal is energized, a valve at the top of the needle opens, allowing the pressurized fuel at the top of the needle to return to the tank through the return line. Piezo electric fuel injector process diagram (via Diesel Hub) Pressurized fuel is also delivered to the top of this needle, the force of which keeps the needle closed. High pressure fuel is delivered to the tip of the injector where a needle rests and blocks fuel from being injected. A piezo injector can act up to five times faster than a standard injector solenoid and the motion is frictionless, which allows for precise fuel measurement and multiple injector events per combustion cycle. But solenoid injectors tend to vibrate more than piezo units, creating more noise. It rapidly expands when electricity is applied, making it suitable to act as the actuator in a diesel fuel injector. The technology is well-known, reliable, cost-effective, and the unit is physically smaller than piezo units. These are: Fuel injector nozzle holes Needle valve and seat Electronic Piezo or solenoid-controlled. The list below contains Pico Technologys latest format of guided tests, in a structure that reflects the familiar feel of our Automotive menu (within the. Dirty for Decades Diesel Tractors Bulldozers Clean Up. These waveforms were captured using the Automotive Diagnostics Kit. Sourcing Guide for Tester Solenoid Injector Simulator: We Offer a complete line of 2021 newest sporting goods and equipment for all of your sporting buying demands. Electronic injector simulator could test both solenoid and piezo injector, it support all brands including Bosch, Delphi, Denso, CAT, Cummins, Siemens etc. Piezo injectors are crucial in modern common rail diesel engines, instigating a rapid series of injection events which allow for greater efficiency, performance & reduced emissions.Īt the heart of a piezo injector is the piezoelectric (piezo) crystal. The Automotive menu in PicoScope 6 contains over 150 guided tests and includes example waveforms and scope settings. Injector simulator is used to drive the solenoid of common rail electronic injector, by cooperate with a manual Nozzle Tester, it could test the electronic injector.
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