you can go if the injectors knock.
Did you start knocking or did you keep knocking with novya all the time? What are the nozzles?
Hello. I am glad to welcome you to the site about the gas-cylinder equipment GBOshnik. Today we'll talk about gas injectors, about how at home clean the gas injectors, and also how adjust the LPG nozzles with your own hands, using a micrometer.
Everyone knows that not only gasoline and diesel fuel are “badyazh” in our country. A long time ago, gas filling stations learned to “inflate” our brother, and not with gas, but with air, mixing various muck into the gas fuel, which adversely affects the state of the gas equipment and the entire engine as a whole.
So once it was noticed that the engine is unstable on gas, when switching to gas, the engine stalled, and there was simply no idle. Among other things, the dynamics worsened, traction disappeared, gas consumption increased and dips appeared during acceleration. Moreover, the above-described "glitches" were manifested, as a rule, "on cold". After some time after the engine warmed up to the optimum temperature, all these “sores” practically disappeared.
The problem did not allow to live and drive any car. Having rummaged through the Internet, I found similar cases, as well as reviews of those who “won” this problem. Suspicion fell on the filter (how to change filters and drain condensate is written here and here), as well as gas injectors. The filters were replaced, by the way, during the replacement a large amount of resin was found in the filter elements, this alerted and made me think. If there are so many “kaki” in the filters, then what is in the gas injectors? The decision was made - it is necessary to clean the gas injectors, as well as their further calibration. What came of this - read on.
1. The first step is to shut off the gas supply, for this we twist one or two valves on the gas cylinder.
2. We start the car and let it work in order to relieve the pressure in the gas lines and use up the remaining gas.
3. We dismantle the gas rail with nozzles. For everyone, this process will take place in its own way, it all depends on the brand of injectors and the type of engine.
4. Next, using a screwdriver, unscrew the screws and take out the gas nozzles.
5. Remove the rods from the nozzle body. The photo shows the reason for all my troubles - resinous deposits, they even did not allow the nozzles to function fully. When the engine is cold and the injectors are cold, the viscous resin interfered with the proper stroke of the gas injector stem.
6. Using cotton swabs and alcohol (you can also use a solvent), wipe the stems, as well as what is inside the bodies.
7. Assembly is carried out in reverse order.
1. Unscrew the jets from the ramp.
2. We take out the corresponding power plug.
3. Instead of a jet, we install a special adapter into which a micrometer will be installed.
4. Next, set the micrometer, look at the arrow, if it starts to move, then the armature has come into contact with the micrometer rod.
5. Install the plug into the gas injector coil.
6. We knock down the micrometer readings to zero.
7. Apply 12V power to the coil for 1 second or less.
8. We write down the value shown by the device.
Driving gas-fueled cars, drivers often face incorrect operation or breakdowns of LPG. The efficiency of this equipment largely depends on the health of the gas injectors. Their operation takes place under conditions of exposure to high temperatures, and sometimes low-quality fuel.
Owners of vehicles running on gas are advised to know how to repair, clean and adjust the 4th generation LPG injectors with their own hands. This will help in some situations and save money.
Gas injectors are special LPG units that are responsible for the dosage of fuel, in fact, they are high-speed valves. Thanks to their correct operation, the required ratio of the gas-air mixture in the internal combustion engine is ensured. Such mechanisms began to be used in the 4th generation of HBO.
Some of the most popular are stock models from Valtek (Valtek), Rail (Reil), Digitronic (Digitronic), OMVL (OMVL), Lovato (Lovato). Their undoubted plus is that they are easy to repair, which consists in flushing, replacing a repair kit and adjusting, in contrast to non-separable injectors like BRC (BRS), Barracuda (Barracuda) and the like.
Symptoms of a malfunction of one or more injectors may include:
high fuel consumption;
deterioration of the dynamic characteristics of the machine;
unstable engine operation, troit of the internal combustion engine (one or a pair of injectors does not work);
failures when pressing the gas pedal;
malfunctions of various sensors, appearance of “Check engine” errors (for example, MAC sensor);
knocking in the nozzles (loudly "clatter");
gas leaks through injectors (pouring / poisoning);
the car stops idling, the injectors do not turn on.
The reasons for this may be:
wear of damper rubber rings on the valve stems (because of this, the nozzles knock);
development of the seat (seat) of the valve or its locking rubber;
wear of a rod (also called a piston, an anchor) or a liner (aka a core, a cylinder, a bulb);
jamming of the anchor in the cylinder;
weakening of the elasticity of the piston return spring;
failure of the electromagnetic coil (solenoid);
violation of the integrity of the wiring.
All of the above reasons may appear naturally or due to low-quality parts, untimely maintenance of gas equipment, violation of the rules for installing injectors. So, for example, without replacing the LPG filters on time, gas condensate (oily liquid, water, dirt) can get into the nozzles, which can cause their wedging or accelerated wear.
Also, the horizontal position during installation affects the uneven wear (ellipse) of the sleeve body and stem. And the banal non-observance of the rules for installing wires (twisting instead of soldering, mixing up, improper fastening) can cause problems over time.
A detailed check of the gas injectors (injection / opening time, throughput) is possible only when connecting diagnostic equipment, as well as after dismantling the entire ramp and checking it on a special stand in a car service. Or build a homemade stand.
It is possible to independently identify which injector does not work and the presence of leaks (tightness) is possible only by alternately disconnecting the connectors / chips and removing the hoses from the outlet fittings. It is highly discouraged to use such methods!
To repair the 4th generation LPG injectors of the Valtek or OMVL type, for this you need to remove the entire rail assembly:
shut off the gas supply to the cylinder. To do this, you need to turn on the corresponding valve of the multivalve;
start the engine for a while to use up fuel residues from the system;
disconnect the battery terminals;
disconnect hoses and power supply;
by unscrewing the vibration dampers, remove the gas train.
In order to disassemble and flush the nozzle (consider the example of Valtek type 30), you need:
using a 12 key, unscrew the calibration jets / nozzles from the bottom of the ramp;
use round-nose pliers or a screwdriver to remove the locking rings of the coils;
dismantle the coils;
unscrew (key 14) the valve cores and remove the pistons from them.
Next, you need to check for wear: rubber parts, valve seats and stems with sleeves.
Important! If it is intended only to clean the gas injectors, without replacing parts, it is imperative to assemble all the elements in their places without confusing them.Also, in this case, it will help to extend the life of the nozzles - if you turn over the spilled locking rubber bands on the rods
Carry out a defect identification of parts. Identify the squeezed rubber rings, bumpers and seals, also check the cylinders and anchors for wear. The valve elastic should not have large recesses from the seat. The saddle also shrinks over time. Discard unsuitable parts.
Then clean the parts of the nozzles from dirt deposits, it is convenient to do this with a rag, cotton swabs. Using a carburetor cleaner (carbokliner), acetone, gasoline or other similar products. it is impossible to wash them with aggressive substances. Rubber can swell from such compounds. For the same reason, it is not advisable to clean / rinse nozzles (non-separable) such as Hana, Barracuda, Brc, the effect of such cleaning is enough for a short time, if at all they will work after that.
A repair kit for gas injectors, as a rule, is completed only with rubber products (RTI), a rod and a spring, for one injector or the entire ramp. You can also buy a complete set of parts (rods with core bodies and return springs assembled). It happens all separately. On average, the price of a standard repair kit for one rail will be about 500 rubles.
Based on numerous reviews from drivers, for Valtek injectors, and this is LPG Tech, GREEN GAS (Green Gas), Atiker (Atiker), WentGas (Ventgas), Tomasetto (Tomasetto), Yota (iota), Digitronic (Digitronic), even Lovato ( Lovato), original RAIL repair kits are best suited.
The peculiarity of the r / c is that their piston has a hole in the body, this solution reduces the effect of the syringe. If the choice fell on another manufacturer, you should pay attention to the lack of magnetic properties of the metal of the parts (this should not be), dimensions, weight.
The whole replacement process consists in assembling the block of mechanisms in the reverse order:
if the pistons are not changed, then remove from the seats on the rods and replace the rings (rubber dampers / bumpers);
install (new / old) anchors and return springs in the sleeves;
change the O-rings of the stem stroke adjusting screw, as well as under the coil and core;
screw the sleeves into the rail;
put on coils, retaining rings.
It is recommended to use all seals once. Calibration outlet / nipples do not need to be installed at this stage.
The adjustment of the 4th generation LPG gas injectors of the Valtek type is reduced to adjusting the stroke for uniform dosing of fuel.
There is a calibration option, using a factory or home-made stand for checking and calibrating gas injectors; not even all service stations have such equipment.
Do-it-yourself calibration of gas injectors is performed with a micrometer device with an extension sleeve / sleeve and a thread on it corresponding to the thread of the dosing nozzle, it is also a dial indicator with a scale of 0.01 mm (it is completed with depth gauges, bore gauges).
You will also need a 4-12 V power supply (for example, a battery or a power supply), a piece of wire with a connector to the injector and a button for a short-term impulse so that the injector coil does not burn out (remember that the solenoid resistance is 1-3 ohms).
fix the micrometer to the ramp;
make sure that the indicator rod touches the injector armature;
apply power to the coil for up to 1 second (ideally, you first need to run several cycles to warm up and shrink the damping rings);
set the value on the device to 0;
in this way, adjust the plunger stroke. By turning the core screw clockwise, the gap decreases, counterclockwise - increases. It is necessary to achieve the same values on all valves.
Below is a table for calibrating the armature travel of Valtek gas injectors, depending on the power of the power unit:
firstly, they do not service HBO in a timely manner;
secondly, the cheapest filters for liquid and vapor fraction of gas are installed;
thirdly, they fill the car with the cheapest gas.
In combination, these three factors lead to the fact that dirty gas containing mechanical particles and oily impurities passes through ineffective cheap filters and is partially deposited on the walls of the nozzle channels. This, in fact, accelerates their pollution. To avoid this, it is desirable to exclude each of these factors.
Gas filters
The most efficient filters in our operating conditions are Ultra 360 ° steam filters and filters with a filter element made of bulpren material.
The Ultra 360 ° gas vapor filter has a condensate sump, a high-quality filter element (replaceable). The connections to this filter can be connected at different angles.
Refueling place
But unfortunately, in Ukraine, automobile gas is not produced; it is imported mainly from Belarus and sold at some network filling stations. The advantage of network gas stations is that their owners are usually more conscientious about servicing refueling equipment, replacing filters, etc.
Consequences of contamination of injectors
When the nozzles become dirty, due to their different location and different temperature effects, they start to work differently, i.e. their performance changes. If such an imbalance has arisen, problems will not be long in coming. With a small difference in the gas supply between the cylinders, unstable engine operation is provoked, a slightly increased gas consumption.
The red line in the graph indicates a dangerous drop in performance from one of the four nozzles.
If one or two injectors supply a significantly less amount of gas, then the electronics, guided by the readings of the lambda probe, will recognize the lean air-fuel mixture and will increase the fuel supply to normalize it. Because of this, two cylinders with normal injectors will run on a rich mixture, which will cause an increase in temperature, burning valves, etc. Therefore, instead of obtaining a high engine resource, due to better preservation of the properties of engine oil when operating on liquefied gas and a softer engine operation, one may, on the contrary, face the need for premature repairs.
To exclude this, the injectors must be periodically checked at a special stand. The difference in their productivity should not be more than 10%.
Dzagnidze stand for testing the performance of gas injectors
Cleaning the nozzles
Regular cleaning allows you to eliminate irreversible aging processes of deposits, as a result of which they are no longer removed. But it is worth remembering that self-cleaning of the injectors is unacceptable, since you cannot guarantee the quality of cleaning and the uniformity of operation of the injectors after installation.
After some time valves started to work loudly , while the engine worked fine, flawlessly. But a few days ago, when switching to gas, the engine began to triple, and the ChecK Engine caught fire ... At the same time, the engine runs flawlessly on gasoline. It follows from this that all the blame for HBO , namely the injector valve.
One of the nozzles clicked very loudly ... By disconnecting the coil, it became clear which cylinder was not working. In order not to contact the masters and not pay, I decided to repair the valves of the LPG gas injectors with my own hands.
To do this, first I had to disassemble the injector valve ... At the same time, it turned out that the locking elastic band located on the core was intact, but damper ring worn out , which led to the fact that the core was constantly knocking with metal on metal. On the rest of the valves, the damper rings were in order, only on the inoperative cylinder the ring was worn out. After that I decided to replace the damper ring, in the hope that it would help. Rem. the kit costs about 120 rubles, but we managed to find it directly damper rings 5 rubles apiece ... After the purchase, I replaced the ring on the inoperative valve, started the car, switched to gas - everything works perfectly , there is no clanking sound, the engine does not troit.
It's obvious that a worn out damper ring directly affected the quality of the core rebound, and as a result, the electronics turned off the valve that was not working correctly ... In my case, the gas train served 37.5 thousand km without repair.
This is how the HBO injector valve was repaired with our own hands.
This material was taken from one of the specialized forums, its reliability has not been confirmed.
VIDEO
The device and repair of Valtek injectors and all of which are arranged in the same way. Design features. Calibration.
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HBO 4th generation.
In order not to get to the repair, you need to do it yourself, I was at the specialists, so to speak, I asked the price, they told me so: leave the car, we will put the repair kit, see the el valve, and call you. I got into the car and went home to figure it out myself! Help for the author: I am raising funds for the purchase of a new camera, GoPro, to shoot better and more varied video. THANK YOU. ● WebMoney Z612811672732 (currency) ● WebMoney R566855659466 (ruble) ● WebMoney U909697664561 (hryvnia) ● Qiwi +380958719645 ● Yandex Money 410014958701316
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VIDEO
The device and repair of Valtek injectors and all of which are arranged in the same way. Design features. Calibration.
TOP 10 unique cars of the USSR, which you will never see Subscribe to the Telegram channel: These # cars mainly exist in a single copy or at most several in several copies. It's worth looking at, it's a pity that each # concept has remained a concept for different reasons.
HBO 4th generation.
In order not to get to the repair, you need to do it yourself, I was at the specialists, so to speak, I asked the price, they told me so: leave the car, we will put the repair kit, see the el valve, and call you. I got into the car and went home to figure it out myself! Help for the author: I am raising funds for the purchase of a new camera, GoPro, to shoot better and more varied video. THANK YOU. ● WebMoney Z612811672732 (currency) ● WebMoney R566855659466 (ruble) ● WebMoney U909697664561 (hryvnia) ● Qiwi +380958719645 ● Yandex Money 410014958701316
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How to eliminate the knock of Renault Megane gas injectors. The problem of loud robotic injectors has been resolved. The details of solving this problem are described in this video.
Device and car repair> Repair and maintenance> Self-repair of LPG gas injectors for a car
Gas equipment is currently in great demand due to economic instability and the constant growth of gasoline.
The correct operation of this entire well-established system is set by the LPG injectors. Their job is to open and close the piston in time to supply fuel to the engine.
However, quite often this part fails, thereby stopping the operation of the entire HBO. To establish the mechanism, they need repairs.
To decide how to make it yourself, you need to find out what are the main failures of the nozzles and how to fix them.
So, one of the main reasons why a gas injector can fail is the use of low-quality fuel with a large number of various impurities.
They contaminate the nozzle and prevent it from performing its functions properly. To avoid this, due attention should be paid to the choice of filters that protect the nozzles from contamination.
To remove dirt, clean the nozzles using a special stand, disassemble or calibrate them.
In addition, the cause of the breakage of the injectors is the unbalance of its rail. This most often leads to improper motor operation.
To eliminate this problem, you also need to clean the nozzles, calibrate them, and in the most extreme case, if it is impossible to make repairs, replace the part.
It is necessary to constantly monitor the condition of the gas injectors, periodically cleaning and replacing them. Since without such manipulations, professional repairs will be expensive.
Also, you need to visit a service station to diagnose gas equipment, preventing the formation of various breakdowns in it. It is recommended to carry out such diagnostics once every 10,000 km.
I would also like to note that not every HBO breakdown can be determined independently. There are those that can only be diagnosed by high-profile specialists.
They, with a lot of experience, determine them by ear or on a special electronic stand.
There are also problems with an open circuit and a short circuit in the coil, the so-called electronic malfunctions of injectors. If this does happen, repairs will not be enough here.
This will require a complete replacement. New HBO are equipped with a self-diagnosis function. Such a system itself notifies the driver about the presence of any malfunctions. This allows him to immediately resolve the issue with their repair.
It is also worth paying attention to the manufacturer of the nozzles and their cost.
Cheaper products quickly lose their original characteristics and require a quick replacement, which leads to unnecessary costs. Keep an eye on your car and it will repay you with quality work.
Also see the video below for the process of calibrating gas injectors.
VIDEO
The gas nozzle belongs to the technical units of LPG and regulates the accuracy of the volume of methane or propane supplied to the combustion chamber of the power unit, where the gas-air mixture is then combusted. Liquid gas is supplied to the reducer, evaporation occurs, and then the mixture is supplied under pressure to the nozzles. That is, injectors are the main element for supplying fuel to a vehicle engine.
Nozzles offered on the market by manufacturers are very diverse in their technical performance and design characteristics.
The main and fundamentally important points when choosing this element of the LPG system are the following points:
the material from which the body is made;
the type of fuel used;
voltage at which the coil operates;
pressure generated during operation and maximum pressure;
time interval for which items are opened;
closing period;
the temperature range at which the engine operates;
diameter of the outlet connection outside;
valve seat dimensions;
variations in the size of the gas injector nozzles.
It is important to take into account each given technical accuracy, because each value gives a significant change in the operation of the LPG set and greatly affects the correct operation of the unit.
It all depends on which generation the LPG is chosen, since the mechanisms managing the delivery of fuel have strong differences in their design. This must be taken into account when choosing a model, otherwise problems will arise during operation.
A variety of HBO generations is, basically, the conditional compliance of the installation package with the standards and the typical difference in ICE injection:
Generation II meets the Euro 2 standard and is suitable for carburetor engines;
III and IV generation for separate injection, that is, for the injector;
The 5th and 6th generation is already for engines with diagnostic and management systems based on the use of electronics.
With the wrong choice of components for different types of HBO generation, you can waste money and purchase unnecessary materials. And then you will have to dismantle the supplied gas injectors and buy new ones that are directly suitable.
So, in order not to replace the gas injectors, you need to buy a complete set for LPG after the IV generation.And for an earlier version, you can choose gas injectors from those manufacturers who have released an LPG system installed on a car.
And also, in addition to technical characteristics, injection control mechanisms differ in cost.
More expensive brands differ in the following points:
workmanship of parts;
using high quality materials;
the accuracy of the study of individual important points;
great life resource;
distinctive reliability.
When thinking about which nozzles to choose, it is best to seek advice from a specialized center where the equipment was installed.
The LPG gas nozzle, in the event of a malfunction in the injection system, is fully repairable. But for this you need to have a repair kit for gas injectors on hand.
Since the correct and well-coordinated operation of the entire LPG system is set precisely by the nozzles, it is necessary to learn how to diagnose their malfunctions.
contamination of the nozzle;
violation of the balance of the reiki;
open circuit;
coil closure;
electronic problems.
There can be many reasons, but if you ignore them and do not react in time, then you can limit yourself not only to replacing the parts of the injection mechanism, but to say goodbye to the entire power unit. Therefore, in case of doubt, what exactly is the malfunction, it is better to deliver the car to an electronic stand, where mechanics will describe the breakdown in detail.
It may end up figuring out how to clean the gas injectors, or maybe extended repairs are needed. But, in any case, it is more profitable from an economic point of view than replacing the entire engine.
Although HBO of the new generation are already equipped with systems that themselves monitor and diagnose problems. But still, if the car is retrofitted with a gas installation, inspecting the system itself is absolutely not an extra manipulation. It happens that in the course of the investigation, minor trifles emerge, which, however, can lead to serious damage.
Also, when buying injectors, it is necessary to familiarize yourself with the manufacturer's reviews and conduct a comparative price comparison for such parts, since cheap parts can cause big problems. It is best of all, if you have any questions regarding HBO, contact the station, where specialists will be able to advise on the operation of the HBO system.
Video (click to play).
VIDEO
