Common Rail Fuel Injectors
Wholesale Common Rail Fuel Injectors Supplier
Complete Product Categories
Guangzhou Baijiahui Industry & Trade Co., Ltd stocks a variety of fuel injectors, automotive sensors, ignition coils, spark plugs, power window switches, idle speed control valves, VVT timing valves, clock spring wires, and more. With over 10,000 different part numbers, we strive to be the first choice for all your diesel injection needs.
Authenticity Guaranteed
We take a strong stance against imitation and the spare parts we sell are 100% genuine from reputed engine parts manufacturers, including both OEM and replacement part brands. When purchasing from Baijiahui, you can have peace of mind knowing that you are receiving a genuine product, designed to bring out the optimal performance of your engine.
Reliable Partner
We can provide customers with competitive prices and also provide customers with one-year after-sales service. Due to the good stability of our products, on-time delivery time and sincere service, we have established a positive and reliable reputation in this field.
What is Common Rail Fuel Injectors?
Common rail injectors are a key component in common rail technology. The common fuel rail supplies each common rail injector with high pressure fuel to be precisely sprayed into the cylinders at a desired pressure, thereby serving to optimize efficiency and performance. Advancements in fuel injection technology are rapidly being made, including the greater adoption of piezoelectric injectors (piezo injectors) for increased precision and greater capabilities for handling high pressures.
Solenoid or piezoelectric valves make possible fine electronic control over the fuel-injection time and quantity, and the higher pressure that the common rail technology makes available provides better fuel atomisation. To lower engine noise, the engine's electronic control unit can inject a small amount of diesel just before the main injection event ("pilot" injection), thus reducing its explosiveness and vibration, as well as optimising injection timing and quantity for variations in fuel quality, cold starting, and so on. Some advanced common rail fuel systems perform as many as five injections per stroke.
Common rail engines require a very short to no heating-up time, depending on the ambient temperature, and produce lower engine noise and emissions than older systems.
Solenoid-Type Injector
Solenoid-type injectors control fuel injection by opening and closing the control valve with magnetic force, using a solenoid on the actuator.
Piezo-Type Injector
Piezo-type injectors achieve faster responsiveness than solenoid types by using piezo elements on the actuators. Piezo elements work by converting changes in the voltage applied into expansion and contraction (displacement). A characteristic of piezo-type injectors is built-in piezo stacks that layer (stack) these piezo elements.
Advantages of Common Rail (CR) Injection System
Fuel Pressure Independent of Engine Speed and Load Conditions
This allows for flexibility in controlling both the fuel injection quantity and injection timing and enables better spray penetration and mixing even at low engine speeds and loads. This feature differentiates the common rail system from other injection systems, where injection pressure increases with engine speed. This characteristic also allows engines to produce higher torque at low engine speed—especially if a variable geometry turbocharger (VGT) is used. It should be noted that while common rail systems could operate with maximum rail pressure held constant over a wide range of engine speeds and loads, this is rarely done. As is discussed elsewhere, fuel pressure in common rail systems can be controlled as a function of engine speed and load to optimize emissions and performance while ensuring engine durability is not compromised.
Lower Fuel Pump Peak Torque Requirements
As high speed direct injection (HSDI) engines developed, more of the energy to mix the air with fuel came from the fuel spray momentum as opposed to the swirl mechanisms employed in older, IDI combustion systems. Only high pressure fuel injection systems were able to provide the mixing energy and good spray preparation needed for low PM and HC emissions. To generate the energy required to inject the fuel in approximately 1 millisecond, the conventional distributor pump would have to provide nearly 1 kW of hydraulic power in four (in a 4-cylinder engine) 1 ms bursts per pump revolution, thus placing considerable strain on the drive shaft. One of the reasons behind the trend toward common rail systems was to minimize the maximum pump torque requirement. While the power and average torque requirements of the common rail pump were similar, high pressure fuel delivery is to an accumulator and thus the peak flow rate (and peak torque required to drive the pump) does not have to coincide with the injection event as is the case with the distributor pump. Pump discharge flow can be spread out over a longer portion of the engine cycle to keep pump torque demand more even.
Improved Noise Quality
DI engines are characterized by higher peak combustion pressures and, thus, by higher noise than IDI engines. It was found that improved noise and low NOx emissions were best achieved by introducing pilot injection(s). This was most easily realized in the common rail system, which was capable of stable deliveries of small pilot fuel quantities over the entire load/speed range of the engine.
●Positioning an electric coil assembly adjacent to a magnetic core which is comprised of a magnetic permeable material for receiving magnetic energy from said coil assembly.
●Injection molding plastic around both said magnetic core and said coil assembly to totally surround and hermetically seal said coil assembly and permanently position said coil assembly adjacent to said magnetic core, said injection molding step also forming a cavity concentric to said coil assembly.
●Slidably inserting an armature into said cavity, said armature comprised of a magnetic permeable material for magnetically coupling to said magnetic core; and coupling a needle and seat valve to said armature for controlling fuel flow.
How to Replace the Fuel Injectors in Your Vehicle?
Removing the Old Injectors
●Let your car cool down and disconnect the battery. Let the car cool off for 30-45 minutes if you were driving recently. Pop your hood and put some gloves on. Then, remove the battery terminals to disconnect the battery.
●Locate the fuel injectors on your intake manifold. Take a look right behind your engine. Your fuel injectors are the 4-8 connectors that run from the fuel rail into those pipes where they meet your engine.
●Use pliers to remove the fuel injector connectors on the fuel rail. The connectors should all have sleeved cables running from the injectors or rail and away from the engine.
●Unlock the fuel rail using a socket wrench or screwdriver. There may be clips, screws, or bolts. Remove them to release the fuel railing as one piece. Gently pull the railing up and away from the engine.
●Wiggle the injectors gently until they pop out. There may be clips you need to press on to remove each injector from the fuel rail.
Installing the New Injectors
●Dip the tip of each new injector in a small cup of gasoline. Purchase fuel injectors designed specifically for your make and model’s engine. Then, dip the end of each injector into a small cup of gasoline. This will lubricate the O-rings and ensure that gas doesn’t leak once you install the new injectors. Let all of the droplets stop.
●Slide the new injectors into their slots on the fuel rail. Reinstall the injectors the same exact way they were removed. Insert the end with the clips into the fuel rail with the gas-dipped side hanging on the other end facing your engine’s intake manifold. Insert each of the injectors into the railing.
●Line the injectors into the corresponding holes on the engine. Locate each of the openings in the intake manifold where you originally removed the injectors. Raise the fuel rail up, line the injectors up with the holes, and carefully slide the fuel injectors into their corresponding slots.
●Reinstall all of the connectors and clips that hold the fuel rail in place. Put the fuel injectors back where they belong. Screw in any corresponding retaining screws or reattach any clips you removed. Whatever you did to remove the fuel rail from the intake manifold, do that in reverse.
Bigger is Not Always Better
It’s easy to fall into the trap of thinking that bigger fuel injectors equal more power, but unless your engine is set up to deal with the extra fuel, you’ll be on a fast track to trouble. The excess fuel will flood the engine and it either won’t run at all, or will be running too rich. This can lead to fouled spark plugs and damage to the engine.
Running too lean
At the other end of the scale is where you’ve modified the engine but the injectors aren’t delivering enough fuel to keep up. If you’ve added a turbo, a higher flowing fuel pump, a bigger exhaust and remapped your computer, you’re going to need bigger fuel injectors. Otherwise your car will be running too lean and you’ll have a situation where your it is sluggish and lacking in power at best, or at worst, you’ll burn out the pistons and destroy the motor.
Size Does Matter
Both of these scenarios highlight why it’s important to have the right-sized fuel injectors. The best place to start to work out the right fuel injector size for your needs is to get an understanding of how much horsepower you expect to achieve with your modifications. We recommend you enlist the aid of a reputable car tuner to determine this.
The Other Critical Factors are:
●Whether the car is turbocharged or supercharged, and.
●Whether you are using e85 or standard pump petrol.
Pour Injector Cleaner Into Fuel Tank
Start off with a nearly empty fuel tank, or as directed by the manufacturer of the fuel cleaner. Then pour the specified amount of cleaner into the fuel tank. If you're not sure what to buy, ask somebody at a parts store - this will be a common item.
Fill Tank With Fuel
Once the injector cleaner is in the fuel tank, go ahead and fill it back up with fuel. Run a Top Tier gasoline brand when you can - it's held to a detergent standard.
Start it Up
Start the engine up and let the cleaner work its magic.
Rinse, Repeat
Repeat this process every oil change to ensure your injectors don’t get gunky again. And that’s it, you did it!
To make the maintenance of fuel injectors safer, there are a number of steps you can take.
●Conduct a risk assessment before carrying out routine engine maintenance.
●Follow the manufacturer’s instructions. These are written with safety in mind for both the engine and the person working with it.
●Where appropriate, consider the use of additional personal protective equipment such as safety glasses, long rubber gloves and boots. This will give some protection to the person doing the work.
●Consider isolating all engine cooling systems that flow through the cylinder head.
●Check the tolerances for injector sleeve and cylinder head. If necessary, ask the manufacturer to supply the tolerances.
●Use the manufacturer’s lapping tool for reconditioning any sealing surfaces required as part of this maintenance.
Frequently Asked Questions
Q: How does Common Rail Injection work?
Q: What is the difference between common rail and standard injection?
Q: What is the difference between a unit injector and a common rail?
Q: What is the difference between common rail and direct injection?
Q: How does a common rail injector work?
Q: What are the three types of fuel injection?
Port or multipoint fuel injection.
Sequential fuel injection.
Direct injection.
Q: Is common rail injection better?
Q: What is the advantage of common rail fuel system?
Q: Is common rail only for diesel?
Q: What are the disadvantages of the common rail fuel injection system?
Q: What fails in common rail injectors?
Q: Why do common rail injectors need coding?
Q: What should common rail fuel pressure be?
Q: How long do common rail injectors last?
Q: What is the best type of fuel injection?
Q: What are the 2 types of injector used in a common rail diesel engine?
Electromagnetic CRD injectors.
Piezoelectric CRD injectors.
Q: When should I replace my common rail injectors?
Q: What is the purpose of the common rail?
Q: What are the 5 components of a common rail fuel system type?
High-pressure pipe - sends fuel to the injection nozzle.
Injection nozzle - injects the fuel into the cylinder.
Feed pump - sucks fuel from the fuel tank.
Fuel filter - filtrates the fuel.
Engine control unit.
Q: What are the advantages and disadvantages of common rail?
Q: What is the difference between common rail and normal diesel?
Q: What is the main difference between a mechanically operated injector and a common rail injector?
Q: What safety precautions should be observed when checking the spray from an injector?
Q: What is the correct procedure for fuel injector inspection?
As one of the most professional common rail fuel injectors manufacturers and suppliers in China, we're featured by quality products and competitive price. Please rest assured to buy common rail fuel injectors in stock here from our factory. Contact us for free sample.
injector 0280158119, auto injector 96487553, injector Valve for renault clio 1 2