The question of who exactly invented the hydrogen engine does not have one single name, since the path from the first chemical reaction to a working power unit took almost two centuries. The idea of using hydrogen as a fuel arose long before the appearance of the first cars, back in the era when humanity was just beginning to comprehend the laws of thermodynamics and chemistry of gases. First experiments were carried out by scientists who were looking for an alternative to steam engines and looking for ways to more efficiently convert combustion energy into mechanical work.
Historical context of creation hydrogen engines closely intertwined with the general history of internal combustion engines. Many engineers of the time tested various gases in parallel, including lamp gas, propane and hydrogen, trying to find the optimal balance of power and efficiency. It was during this period that the fundamental principles on which modern developments in the field of hydrogen energy are based were laid.
Today, interest in this topic has revived with renewed vigor due to environmental requirements and the need to decarbonize transport. Understanding how a technology has developed in the past helps predict its future and assess its true potential. hydrogen fuel cells. We will look at the key stages in the evolution of this technology and determine which inventors made a decisive contribution to its development.
The Birth of an Idea: 19th Century Experiments
If we talk about the very first person who theoretically substantiated the possibility of using hydrogen as a fuel, then it is worth remembering the French physicist and chemist Francois Isaac de Rivaz. It was he who, in 1806, created the world's first internal combustion engine, powered by a mixture of hydrogen and oxygen. This device is known as de Rivaz machine, became the progenitor of all modern internal combustion engines, although it was not widely used due to the difficulty of storing gases.
De Rivaz not only mixed gases, he introduced the concept of spark ignition, revolutionary for that time. Its engine did not have valves in the modern sense, and the gases were supplied manually, after which an explosion occurred, pushing the piston. Operating principle was simple, but extremely dangerous and inconvenient for practical use at that time.
⚠️ Attention: Early experiments with hydrogen often ended in explosions due to the lack of pressure and mixture quality control systems, which slowed down the development of technology for decades.
Despite limited success, de Rivaz proved that hydrogen could serve as a source of mechanical energy. His patent became the starting point for further research in Europe. Engineers of that time realized that the energy intensity of hydrogen significantly exceeded that of coal and firewood, which opened up enormous prospects for the industrial revolution.
The era of Ethlen Lenoir and the first commercial attempts
The next important stage was the mid-19th century, when the Belgian engineer of French origin, Etienne Lenoir, created his gas engine. Although it primarily used illuminating gas, its engine design allowed it to operate on other flammable gases, including hydrogen. In 1860, Lenoir even tested a three-wheeled car that used liquid hydrocarbons, but the theoretical basis made it possible to consider pure hydrogen.
Lenoir's engine had a low efficiency of only about 5%, making it economically disadvantageous compared to steam engines. However, it was he who first proposed using an electric spark to ignite the mixture, abandoning an open flame. This invention became critically important for all subsequent developments in the field internal combustion engines.
During this period, engineers were actively looking for ways to liquefy gases for ease of storage. The understanding that hydrogen has the highest specific heat of combustion among all types of fuel has pushed scientists to find solutions to the problems of its storage. However, cryogenics technology did not yet exist, which was the main obstacle.
- 🔥 Lenoir was the first to introduce electric ignition, replacing the open flame.
- ⚙️ The efficiency of early engines was extremely low, which limited their use to stationary installations.
- 🚗 The first attempts to create a gas-powered car date back to this period, long before gasoline analogues.
Despite the technical shortcomings, Lenoir's work showed the industry that the era of steam was coming to an end. The race was on to create a smaller, more powerful source of energy, and hydrogen was seen as one of the leading candidates until cheap oil was discovered.
Nikolaus Otto and the improvement of the combustion cycle
Nikolaus Otto, a German engineer, made perhaps the most significant contribution to the development of engine technology with the creation of the four-stroke cycle named after him. Although it became famous for its coke oven gas engines, the principles behind Otto cycle, were ideal for hydrogen. Hydrogen burns faster than gasoline, which requires fine-tuning the valve timing, something Otto and his partners have been working on extensively.
In 1876, Otto introduced his first successful four-stroke engine. He demonstrated that compressing the air-fuel mixture before ignition significantly improves efficiency. For hydrogen, which has a wide flammability limit, this method has proven to be particularly effective, allowing high power levels to be achieved.
Why does hydrogen burn better in the Otto cycle?
Hydrogen has a very high combustion rate and wide flammability limits. This allows the engine to run on very lean mixtures, which reduces combustion temperatures and, as a result, nitrogen oxide emissions, while maintaining high efficiency.
It is important to note that Otto did not use pure hydrogen en masse due to the high cost of producing it at the time. However, its design became the de facto standard for all subsequent experiments with gas fuels. Four stroke cycle made it possible to create compact engines, which were later installed on the first cars.
Otto's legacy is that he transformed the internal combustion engine from a curiosity to a reliable machine. Without his work to improve the tightness of cylinders and the ignition system, the use of volatile hydrogen would have been impossible in principle.
Soviet period: from BSESch to hydrogen aircraft
In the Soviet Union, interest in hydrogen as a fuel arose back in 1941, when, due to a shortage of gasoline in besieged Leningrad, it was decided to convert the engines of power plants and cars to hydrogen. Engineer B.I. Shubin developed a gas generator that made it possible to produce hydrogen from aluminum and alkali, but a more ambitious project was the use of hydrogen in aviation.
In the 1960-70s, active development was carried out in the USSR to create hydrogen engines for aircraft. Under the leadership of the outstanding designer Nikolai Kuznetsov, experiments were carried out to convert turbojet engines to liquid hydrogen. The Tu-155 laboratory aircraft successfully flew, proving the technology.
| Parameter | Gasoline internal combustion engine | Hydrogen internal combustion engine | Hydrogen Advantage |
|---|---|---|---|
| Octane number | 92-100 | 130+ | High detonation resistance |
| Combustion energy (MJ/kg) | ~44 | ~120 | 3 times higher energy intensity |
| Combustion products | CO2, H2O, NOx | H2O, NOx | Zero carbon emissions |
| Burning rate | Low | High | Fast combustion of the mixture |
Soviet engineers were faced with the problem of storing liquid hydrogen at a temperature of -253°C. Unique cryogenic tanks were developed, which are still considered one of the best in the world. These developments laid the foundation for modern space programs and experimental vehicles.
Unfortunately, with the collapse of the USSR and the fall in oil prices, many of these projects were frozen. However, the experience gained by Soviet designers proved that hydrogen engine - this is not science fiction, but a completely working engineering reality that requires only solving economic issues.
The modern stage: Toyota, BMW and the technology race
In the 21st century, Japanese and German automakers picked up the baton. Toyota pioneered the mass production of hydrogen fuel cell vehicles with its Mirai. However, they also do not forget about classic internal combustion engines, experimenting with engines running on compressed hydrogen, especially in motorsport.
BMW has also carried out extensive testing of hydrogen internal combustion engines based on the Hydrogen 7 model. Engineers have created a bi-fuel system that allows the car to run on both gasoline and liquid hydrogen. This solution was supposed to solve the problem of the lack of hydrogen refueling stations, but the complexity of cryogenic systems again became an obstacle.
☑️ Criteria for choosing a hydrogen car
Today the focus has shifted to building purpose-built racing engines and heavy-duty trucks. Hydrogen allows trucks to refuel in 10-15 minutes and travel long distances, which is not possible with battery electric vehicles. Hydrogen thrust is seen as a key solution for the decarbonization of commercial transport.
Engineers at modern companies use advanced materials to prevent hydrogen leaks, since H2 molecules are extremely small and can penetrate metals, causing hydrogen embrittlement. The development of special alloys and composites has become a separate scientific discipline.
Fundamental differences between a hydrogen internal combustion engine and fuel cells
It is important not to confuse a hydrogen internal combustion engine (H2 ICE) and a hydrogen fuel cell electric vehicle (FCEV). In the first case, hydrogen burns in the cylinders, causing the pistons to move, just like in a gasoline engine. In the second case, a chemical reaction occurs between hydrogen and oxygen, producing electricity that turns the electric motor.
A hydrogen internal combustion engine retains all the advantages of traditional mechanics: it is cheaper to manufacture, does not require rare earth metals for catalysts (platinum, as in fuel cells) and is easy to maintain for mechanics. However, its efficiency is lower than that of fuel cells, and it still emits small amounts of nitrogen oxides due to the high combustion temperature of the air.
⚠️ Attention: When converting a gasoline engine to hydrogen, it is necessary to replace the ignition system and intake manifold, as hydrogen is prone to backfiring and requires a high energy spark.
Fuel cells, in turn, have an efficiency of up to 60%, which is twice as high as the best internal combustion engines, but they are complex, expensive and sensitive to fuel quality. The choice between these technologies depends on the task: for mass cheap transport, internal combustion engines are more interesting; for the premium segment and stationary energy, elements are more interesting.
The hydrogen internal combustion engine is a bridge between the fossil fuel era and the hydrogen economy, making it possible to use the existing production capacity of the auto industry.
Prospects and challenges of hydrogen energy
The future of hydrogen engines depends not so much on technology, but on infrastructure and methods of producing the gas itself. Currently, 95% of hydrogen is produced from natural gas (“gray hydrogen”), which reduces the environmental impact to zero. For environmental friendliness, “green hydrogen” is required, obtained by electrolysis of water using solar or wind energy.
The main problem remains logistics. Transporting hydrogen is more difficult and expensive than gasoline or diesel. A network of high-tech gas stations capable of supplying gas at a pressure of 350 or 700 bar is needed. Without solving this problem, mass implementation hydrogen cars impossible.
However, many countries, including Japan, Germany and China, have included hydrogen in their national energy strategies. Investment in research is increasing, and it is likely that within 10-15 years we will see commercial trucks and buses powered by hydrogen becoming a common sight on the roads.
- 🌍Green hydrogen is the key to real environmental friendliness, but it is still expensive to produce.
- 🚜 Freight transport is the main candidate for the introduction of hydrogen technologies in the near future.
- 🔧 Preserving internal combustion engines allows you not to throw away millions of existing engines, but to modernize them.
Ultimately, the question of “who invented the hydrogen engine” is transformed into the question of “who will make it available.” It has been a long journey from de Rivaz to today's Toyota engineers, and we are now on the threshold of a new energy transition, the outcome of which depends on technological maturity and economic feasibility.
When considering purchasing a car with a hydrogen engine or cell, be sure to check the map of hydrogen stations in your area and within 300 km of your home - this is a critical operating factor.
Is it possible to convert a regular car to run on hydrogen?
This is technically possible, but requires a complete replacement of the fuel system, injectors, spark plugs and installation of high-pressure tanks. In addition, the ECU needs to be reflashed. Doing this yourself is dangerous and often illegal without certification.
Is a hydrogen engine explosive?
Hydrogen does ignite more easily than gasoline, but it is also 14 times lighter than air and, if leaked, instantly evaporates upward without forming explosive clouds near the ground like gasoline vapor. Modern tanks can withstand a bullet shot without exploding.
Why didn't hydrogen cars become popular earlier?
The main reason is cheap oil in the second half of the 20th century. It made no economic sense to invest in complex and expensive hydrogen technologies when gasoline cost pennies. Now the situation is changing due to depletion of reserves and the environment.
What is the efficiency of a hydrogen internal combustion engine?
The efficiency of a modern hydrogen internal combustion engine is about 40-45%, which is higher than that of a gasoline engine (30-35%), but lower than that of a hydrogen fuel cell (up to 60%).