Recently, the use of gas as the main source for vehicle transportation has become a popular and cost-effective solution. To do this, you do not need to change the design of the machine, and the gas does not affect the performance of the engine. After installing gas equipment, it becomes possible to select the type of fuel on which the car will operate by pressing a key.
HBO Digitronic 4th generation today remains one of the most convenient types of equipment used on injection cars. For operation, gas equipment of the fifth and sixth generations are used, but gas equipment of the 4th generation remains the most popular of all, since when connected, the gas equipment of the 4th generation economically doses the gas that is necessary for the correct operation of the engine.
Selecting LPG
You can buy everything in one set or separately. Purchasing a kit from a well-known brand will ensure reliable operation of all elements, as they have passed quality certification. Setting up such a kit is much simpler, but its price will be much more expensive.
It is possible to save money by purchasing equipment elements separately, but we should not forget that the choice of components must be approached responsibly, so as not to be disappointed later during operation.
Having everything you need, you can begin installing the 4th generation HBO. Of course, it’s a good idea to entrust the installation to specialists, paying a considerable amount of money. But it’s better to do it yourself, while saving money and understanding the operation of the equipment.
Installation features, operation
Since reviews of the 4th generation Digitronic gas equipment are positive, more and more drivers are thinking about installing such a unit. Car owners are often interested in the question of how to properly configure the 4th generation Digitronic gas equipment. I would like to immediately note that it is impossible to do this without the appropriate experience and knowledge.
Every vehicle owner should know that in general, 4th generation Digitronic gas equipment, reviews of which are positive, is intended for cars with different characteristics. For example, with regard to fourth-generation control units, as a rule, they are designed for engines where the number of cylinders is from four to eight.
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Thus, motorists should know that in reality the choice of control units designed for this type of equipment is wide and meets all the interests of car owners, which is important. You can also find options, for example, with a shock-proof case, which, naturally, cannot but be in demand.
As a rule, such options are ideal exclusively for those car owners who constantly create critical and difficult operating conditions for their cars. But it is important to take into account that only specially trained technicians should install and configure the control unit.
Gas cylinders that are supplied with the unit can be divided into cylindrical, toroidal, and methane cylinders. As for the second option, they are ideal for owners of crossovers and SUVs.
Read the article about 6 myths about gas equipment.
It is important to take into account here that the cylinders can be installed in the place intended for the spare wheel; as you know, it is located under the bottom of the vehicle. But, of course, installation in other car compartments is also possible.
We can safely say that the 4th generation Digitronic HBO, the reviews of which are amazing, is ideal for all those who want to create not only a safe, but also a comfortable ride, while saving on fuel.
Installation of cylinder, lines and filling equipment
You should start installing HBO from a cylinder. If the car has a sedan body and a large trunk, then it is better to use a cylindrical cylinder with a larger capacity. You need to attach it to the rear of the luggage compartment of the car.
Hatchbacks have small trunks, so it is better to use a toroidal cylinder. To ensure reliable fastening of the cylinder, it is necessary to use rubberized tapes. To properly secure the cylinder, you should take measurements and mark points for future holes. It is also necessary to mark the places where the high pressure line will pass. Having made the markings, you should drill holes in the body in the appropriate places and apply an anti-corrosion primer.
When installing the cylinder, you need to ensure that the special valve is placed on the top of the cylinder. After this, you need to install the refueling device. It can be placed in any convenient place that does not become too dirty during operation of the machine. The main requirement is to place the line from the filling device to the cylinder in a place that is inaccessible to damage.
The main line is made of brass tubes. To avoid damage, the line should be placed next to the gasoline pipeline.
General safety requirements
— Carry out a daily check of the coolant level (antifreeze). — If leaks or damage to the gas equipment are detected, close the main valve of the multivalve on the cylinder and come to the service center. Do not tighten nuts and connecting pipes under gas pressure. — It is forbidden to start the car on gas with the choke removed, this will shorten the service life of the main membrane or cause a rupture. — It is forbidden to leave a car fully filled with gas in the sun without first using several liters. — It is prohibited to operate the gas equipment if external mechanical damage is detected. — It is prohibited to continue driving the car on gas if the smell of gas is detected in the cabin. — When installing and dismantling any LPG components on your own, as well as when storing a car for a long period (more than a month), it is necessary to close the filling and main valves on the multivalve of the cylinder.
Happy operation!
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Gearbox installation
After finishing the lines under the hood, they must be installed along the left side of the car. Installation of the gearbox is permitted only on the load-bearing part of the machine, but in no case on the engine. Also, good access to the gearbox is necessary. Next, you should connect the gearbox to the cooling system. It is necessary to make an insert into the pipes, and after that a pipe with a vacuum is supplied to the gearbox, which is taken from the intake manifold. A filter is mounted into the overall structure, and a reducer is attached to the main line.
Gas train
The next step is to insert fittings for gas flow into the intake manifold. It is necessary to drill holes in it to prevent chips from getting inside. It's better to remove the collector. The location for the holes through which gas should be supplied must be chosen closer to the gasoline injectors. Their diameter should be smaller than the diameter of the fitting, since further threading is required.
Before screwing in, the fittings and threads must be lubricated with sealant. Next, the collector is installed back. We install the ramp in the upper part of the collector so that it does not interfere with the wiring and pipelines that are laid from the ramp to the fittings.
Next, you should lay the pipeline from the gearbox to the ramp. During the process, a filter must be installed in the pipeline. Returning to the gearbox, it is necessary to connect a pipeline to it to supply vacuum. To avoid gas leakage, all pipeline joints are clamped with clamps.
HBO control unit 4th generation
The operation is regulated using an electronic control unit included in the 4th generation HBO kit.
First you need to select a location for installing the unit. During operation, free access to it is important, and at the same time, the length of the wiring must be kept to a minimum. The wiring coming from the controller is divided into several sections that will perform certain functions. The on-board network should be disconnected from the battery terminals before connecting. Next, you need to separate the wires responsible for powering the unit. There should be 3 of them in total: positive terminal, ground and positive terminal of the ignition switch. After separation, they should be connected.
Next, you need to connect the wiring responsible for the operation of the injectors. It should be connected to the wiring leading to the injectors. Having determined the wires that will be connected to each of the injectors, they need to be connected. Next, we connect the connectors to the gasoline injectors and connect the connectors of the gas injectors.
Do-it-yourself step-by-step repair of gas injectors
To repair 4th generation LPG injectors type Valtek or OMVL, you will need to remove the entire rack assembly:
- shut off the gas supply to the cylinder. To do this, you need to tighten the corresponding multi-valve tap;
- start the engine for a while to remove any remaining fuel from the system;
- disconnect the battery terminals;
- disconnect the hoses and power supply;
- Unscrew the vibration dampers and remove the gas train.
Disassembly and washing
In order to disassemble and wash the nozzle (let’s look at the example of Valtek type 30), you need to:
- Using a 12mm wrench, unscrew the calibration jets/nozzles from the bottom of the ramp;
- Using round pliers or a screwdriver, remove the retaining rings of the coils;
- remove 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 rods with liners.
Important! If you plan only to clean gas injectors, without replacing parts, you must assemble all the elements in their places without mixing them up. Also, in this case, it will help to extend the life of the injectors - if you turn over the worn out locking rubbers on the rods .
Carry out troubleshooting of parts. Identify squashed rubber rings, bumpers and seals, and also check the cylinders and anchors for wear. The valve rubber should not have large indentations from the seat. The saddle also tends to shrink over time. Discard unusable parts.
Then clean the injector parts from dirt deposits; this can be done conveniently using a rag or cotton swabs. Using carburetor cleaner (carbocleaner), acetone, gasoline or other similar products. Rubber products (if a decision is made not to change) must be removed and cannot be washed with aggressive substances. Rubber can swell from such compounds. For the same reason, it is not advisable to clean/rinse injectors (non-removable) such as Hana, Barracuda, Brc, the effect of such cleaning does not last long, if they work at all after that.
Selecting and replacing a repair kit
The repair kit for gas injectors, as a rule, is equipped 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). Everything happens separately. On average, the price of a standard repair kit for one rail will be about 500 rubles.
Diagnosis and adjustment
After the 4th generation HBO is fully installed, you can begin activities such as diagnostics and configuration. You will need an adapter that will connect to the laptop, and the software necessary for configuration and diagnostics.
It is better to purchase the program from the same manufacturer as the gas equipment. To connect, the control unit must be powered, i.e., turn on the ignition switch without starting the engine. If there is no connection, the laptop may be using an outdated version of the program or the power contacts are not tightly sealed.
If the connection is successful, all information about the engine will appear on the monitor: polarity, type of injectors, number of cylinders, pressure and temperature in the system. In the vehicle interior, the system control unit must display operation with warning lights. The green light will indicate that the engine is running on gasoline (it is constantly lit), and the red one should flash, indicating the possibility of switching to gas. When configured correctly, signals arrive at the unit under certain operating modes.
Features of installation and operation
Like other versions of gas distribution equipment, GBO OMVL is not recommended for self-installation. Currently version 4 is the most popular. More modern (and expensive) installations are still just being mastered, and previous generations, along with the gradual passing of carburetor engines into the past, are becoming unclaimed.
Among the most popular are the Saver and Dream sets. Suitable for all models with injection without exception, they fit perfectly with them. The kits are completely ready for installation, you just need to pay attention to the compliance of the automation with the engine (number of cylinders) and the distributor-gearbox. All connecting cables, sensors, fittings and other components are selected by the manufacturer, so you don’t have to look for them yourself.
Important. Saver software is based on original gasoline maps, so stable operation of the engine on blue fuel is guaranteed - the difference is almost imperceptible. If this is not the case, the LPG setup may be incorrect or the electronics may be faulty.
Read the link on how to use the diagnostic cable to configure the HBO.
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Another big plus is that the program is available for download on the OMVL website in the latest version. Dream is even more advanced in this regard: it selects optimal injection parameters, which allows it to maintain a smooth ride even with minimal fuel consumption. Again, such a setup of the 4th generation OMVL gas equipment cannot be done with your own hands: the help of specialists from the service center is required. There is probably only one requirement for operation: to monitor the purity of the gas. The durability of the entire system depends on this.
Automatic hardware setup
In this case, you must press the button to force the engine to run on gasoline, as a result of which the red light should go out.
To set up gas equipment, you should warm up the engine on gasoline. After the engine starts, you can compare the indicators of the on-board computer with the data shown on the laptop screen, thereby checking the compatibility of the program with the control unit. When the engine reaches operating temperature, we begin auto-calibration of gas equipment. This is done by clicking “Auto Configuration” on the laptop screen. After turning on automatic calibration, the electronic control unit checks the main engine parameters. If they meet the required parameters, one of the gas injectors is connected.
During the initial connection, the control unit supplies a minimum amount of fuel, and this leads to engine vibration, since the control unit has not yet had time to adjust. Next, the control unit processes the information received from the standard unit and adjusts the gas supply corresponding to the efficiency of gasoline. If the dosage is correct, engine operation will return to normal. Later, when calibrating the remaining injectors, you can determine whether the gas equipment is connected correctly.
When connecting the second injector to engine operation, vibration will not appear. The operation of one gasoline and two gas injectors is quite sufficient for the normal functioning of the engine.
If the vibration persists after the second nozzle is adjusted, this is a signal of incorrect gas supply. Such a violation may be caused by a leaky fitting of the fitting or unequal length of the pipes running from the ramp to the fitting. The software installed on the laptop will indicate exactly which cylinder is malfunctioning. You need to find and fix the problem, and then restart autocalibration.
