Can piezo injectors be repaired?

Can piezo injectors be repaired?

It is very specialised work, and can’t be undertaken by every repair shop. The injector is totally stripped down, cleaned ultrasonically, and reassembled with new parts fitted if necessary.

What is the activation voltage for piezo injectors?

200 volts
WARNING HIGH VOLTAGE: Piezo injectors normally operate at voltages up to 200 volts. Extreme care should be taken to protect against shock.

How does a piezo injector work?

Piezo fuel injectors (CRI4), which use piezo crystals as part of a rapid actuator, are helping manufacturers to meet their Euro 6 target. These injectors work by passing electrical current through a stack of Piezo crystals, causing them to expand; as the crystal discharges the current it contracts to the original size.

What is the difference between piezo and solenoid injectors?

Piezo injectors are quieter and more precise than solenoid units, a benefit in a microsecond environment, but they are more expensive. In both cases, the common-rail principle remains the core of diesel injection systems. A single (common) high-pressure fuel line is connected to individual injectors at each cylinder.

How long does a diesel injector last?

around 100,000 miles
The average lifespan of a diesel fuel injector is around 100,000 miles. A typical fuel injector has two basic parts: the nozzle and the injector body. If either of these components gets clogged or damaged, it will compromise the entire performance of the vehicle.

How can you tell if you have piezo diesel injectors?

The majority of piezoelectric injectors may be recognised by the location of the leak off pipe, located at the side of the injector and not on the top as seen on the electromagnetic type. The operating fuel pressure within modern common rail systems may exceed 1,800 bar, or 26,100 psi.

Can you clean GDI injectors?

As an alternative to removing the fuel injectors and having them cleaned ultrasonically, JLM’s GDI Injector Cleaner is dosed into the fuel tank and is proven to not only remove these deposits but also to reduce the rate of future contamination.

What causes misfiring in GDI engine?

GDI engine misfires are usually associated with engine oil getting into the combustion chamber, or fuel deposits restricting the injection system.

What part do the piezo crystals play in piezo injector operation?

At the heart of a piezo injector is the piezoelectric (piezo) crystal. It rapidly expands when electricity is applied, making it suitable to act as the actuator in a diesel fuel injector.

What is the advantage of piezo actuators over solenoid actuators?

Piezo actuators allow a quasi-static stroke proportional to the charge applied. This is a key advantage compared to solenoid actuators, only achieving partial stroke in ballistic operation.

What are the symptoms of a faulty diesel injector?

5 COMMON SYMPTOMS OF FAULTY DIESEL FUEL INJECTORS

• Trouble starting the vehicle or uneven idling. The engine cranks but doesn’t start unless you crank it for a long time.
• Misfire.
• Smell of fuel.
• Dirty emissions.
• Increased fuel consumption and poor miles per gallon.