The modern car is a complex set of electronic and mechanical systems designed to ensure maximum comfort and safety of the driver. Among the many abbreviations that can be found in the technical documentation or seen on the instrument panel, one of the most important is the GBTS. Many motorists, faced with this term, wonder what exactly lies behind these letters and how it affects the operation of the car.
The definition of the term sounds like Gas cylinder fuel supply system. This is a complex of equipment that allows the vehicle to work not only on traditional gasoline or diesel fuel, but also on gaseous fuel. In recent years, interest in such technologies has been growing, as they can significantly reduce fueling costs and reduce harmful emissions into the atmosphere.
In this article, we will analyze in detail the device of the system, the principle of its operation, and also weigh all the pros and cons of installing LPG on your car. Understanding that, How the GBTS worksIt will help to make an informed decision on the feasibility of re-equipping the vehicle.
What's behind the acronym GBTS
The term GBTS is often confused with simply HBO (gas-balloon equipment), but technically GBTS is a broader concept that describes it. feeding-mixing. This is not just a cylinder in the trunk, but a complex engineering unit integrated into the engine control system. The main purpose of the system is to prepare a fuel-air mixture using gas as the main or alternative fuel.
There are several types of gas used in such systems. The most common are propane-butane mixture (LPG) and methane (CNG). The choice of fuel type directly affects the design gas-reducer equipment and safety requirements. Propane is stored in a liquid state at a relatively low pressure, whereas methane requires the use of composite cylinders and pressures of up to 200 atmospheres.
⚠️ Warning: Using the wrong type of gas or installing equipment that is not certified for a particular fuel may cause the system to depressurize and explode.
The key element distinguishing the GBTS from the mere presence of a cylinder is the electronic control unit. It analyzes data from oxygen, pressure and temperature sensors, adjusting the gas supply in real time. Without this component, the efficient operation of the engine on gas would not be possible.
Principle of operation and system design
The operation of the gas cylinder fuel supply system is based on the exact dosage of fuel. Gas from the cylinder enters the evaporator (reducer), where it passes from the liquid state to the gaseous state. This process is accompanied by a sharp drop in temperature, so the gearbox is connected to the cooling system of the car engine.
After evaporation, the gas passes through a fine cleaning filter and enters the nozzle ramp. Electronic control unit (ECU) opens the nozzles for a strictly calculated time, similar to the work of gasoline injectors. This allows you to maintain the dynamics of acceleration and stability of the engine.
Modern 4th and 5th generation systems operate on the principle of distributed injection. This means that each cylinder of the engine has its own nozzle. This approach minimizes power loss and prevents the cotton effect in the intake manifold.
- ⚙️ Gas cylinder - a fuel storage tank equipped with a shut-off valve.
- 📉 Eporator-evaporator - a device for reducing pressure and transferring gas to a gaseous state.
- 💻 Electronic control unit - the "brain" of the system, correcting the supply of fuel.
- 🔌 Fuel switch - an element in the cabin of the car to select the mode of operation (Gas / gasoline).
It is important to note that the start of the engine almost always occurs on gasoline. The system automatically switches to gas only after heating the coolant to a certain temperature (usually 30-40 degrees Celsius). This is necessary for the correct operation of the gearbox.
Advantages of using gas equipment
The main reason for the popularity of the GBTS remains economic benefit. The cost of a liter of gas in terms of mileage is much lower than that of gasoline or diesel. For commercial vehicles and taxis, this is a critical factor in recouping the cost of the installation in a few months of active driving.
Gas also burns cleaner than liquid fuel. This leads to the fact that motor-oil longer retains its properties, and the soak on spark plugs and valves is formed more slowly. The engine works softer, reduces noise and vibration, which increases overall driving comfort.
When installing HBO, be sure to change spark plugs to special gas or multi-electrode with a reduced gap - this will prolong their life and improve the ignition of the mixture.
The environmental aspect cannot be ignored either. The exhaust gases of gas-powered cars contain significantly less toxic substances. In large megacities with strict environmental regulations, this can be a decisive argument for fleet owners.
The range of the car with the installed GBTS is significantly increased. The presence of two tanks (gasoline and gas) allows you to travel long distances without frequent refueling, which is especially important for travelers and truckers.
Disadvantages and risks of exploitation
Despite the obvious advantages, the system has its drawbacks, which you should be aware of before installation. The main disadvantage is the loss of useful volume in the trunk. The tank takes up a considerable amount of space, and if the car often has to carry oversized cargo, this can be a problem.
There is also a risk of reducing the engine life if the setting is not correct. Gas has a higher combustion temperature than gasoline. If cooling-system works inefficiently or the mixture is too poor, overheating of the valves and their burnout is possible. However, modern 4th generation systems have learned to compensate for this effect.
⚠️ Warning: Low-quality gas at gas stations may contain impurities that will quickly disable the filter and clog the nozzles. Only refuel at the checked stations.
Another nuance is the reduction of the maximum engine power. Depending on the generation of HBO and the quality of the setup, the power loss can range from 3% to 7%. For a quiet city ride, it is imperceptible, but when driving aggressively or overtaking on the track, the difference can be felt.
Comparison of characteristics: Gas vs Gas
To better understand the difference, it is worth considering a comparative table of the main parameters. It will help to assess the feasibility of switching to alternative fuels from a technical point of view.
| Parameter | petrol | Propane-butane (LPG) | Methane (CNG) |
|---|---|---|---|
| Octane number | 92-100 | 105-110 | 105-120 |
| Flamming temperature | ~400°C | ~470°C | ~650°C |
| Cost of 100 km | 100% (base) | ~50-60% of gasoline | ~30-40% of gasoline |
| Power reserve (additional) | - | +300-500 km | +200-300 km |
As can be seen from the table, the gas has a higher octane number, which reduces the risk of detonation. However, the high ignition temperature requires a serviceable ignition system. Ignition coils And the high-voltage wires must be in perfect condition so that the spark is powerful and stable.
Methane, despite having a smaller range compared to propane due to high pressure, is a more environmentally friendly and lightweight option. It is lighter than air and evaporates quickly when leaked, without forming explosive clusters near the ground, unlike propane.
Effect of gas on engine life
There is a myth that gas “dries” the engine. In fact, the problem is not with the gas itself, but with the misconfigured mixture. If the mixture is too poor, the temperature in the cylinders rises and the oil loses its properties. A properly configured GBTS does not harm the engine.
Maintenance and diagnostics
Installation of GBTS imposes on the owner additional obligations for maintenance of the car. The rules are becoming more frequent and strict. This is especially true for replacing filters. The gas filter must be changed every 10-15 thousand kilometers to protect the gearbox and injectors from contamination.
Once a year or every 20-30 thousand kilometers, it is recommended to conduct a computer diagnostics of the system. The specialist checks the correctness of the nozzles, the pressure in the gearbox and the integrity of the highway. It is also necessary to check the tightness of the compounds with a soap solution or a gas analyzer.
☑️ Checklist of BOO services
Particular attention should be paid to the state of gearbox. Over time, the membranes can coarse, which will lead to unstable pressure and floating turns at idle. Timely bulkhead or replacement of the gearbox is inexpensive, but prevents serious breakdowns.
Owners of cars with GBTS are recommended to change engine oil more often. It is better to reduce the replacement interval by 20-30% of the manufacturer's recommended, since the products of combustion of gas can oxidize oil faster.
Legal and security aspects
In Russia and many CIS countries, the installation of gas equipment requires mandatory registration with the traffic police. The process includes preliminary examination, installation by a certified center and subsequent changes to the documents for the car (CTS and PTS). Ignoring these requirements can result in a fine and a ban on operation.
The safety of operation depends on the quality of installation. All hoses must be protected from rubbing, and the cylinder is securely fixed. During the technical inspection, the presence of a valid certificate for the cylinder (usually valid for 2 years, then verification is required) is mandatory.
⚠️ Note: When selling a car with LPG, the new owner is obliged to re-register the documents for the equipment. The absence of a record in the PTS on the established HBO is the basis for refusing to register the vehicle.
Modern systems are equipped with electromagnetic valves that block the gas supply when the ignition is turned off or in the event of an accident. This reduces the risk of leakage in an accident to a minimum. In addition, gas cylinders pass crash tests and are able to withstand impacts equivalent to serious accidents.
Competent installation and regular maintenance of the GBTS make the operation of the car on gas safe and economically profitable, comparable in reliability with a gasoline analogue.
Frequently Asked Questions (FAQ)
Will the engine power drop significantly after installing the LPG?
On modern 4th generation systems, power loss is almost invisible and is about 3-5%. On older systems or if the system is not configured correctly, the loss can reach 10-15%. For most drivers in urban mode, the difference is intangible.
Can you drive only on gas, not including gasoline?
Theoretically, you can set the system to start immediately on gas, but this is not recommended. In winter, the gearbox may not have time to warm up, which will lead to its freezing. In addition, the gas pump can acidify without periodic pumping of gasoline. Gasoline heating is mandatory.
How often should I have a balloon survey?
According to the rules, the metal cylinder requires an inspection every 2 years. Composite (methane) cylinders last up to 20-25 years and do not require frequent inspection, but the exact period is specified in the passport of a particular product.
Does the gas affect the car warranty?
Official dealers often remove the engine and fuel system warranty when installing uncertified HBO. To maintain the warranty, it is necessary to install equipment from the partners of the plant or obtain special permission, which can be difficult.
What to do if there is a smell of gas in the cabin?
Stop immediately, shut down the engine and shut off the valve on the cylinder. Air the salon. Operation of a car with a smell of gas is prohibited - it is necessary to call a tow truck and deliver the car for diagnosis to a specialized service.