![]() Hydrogen engines are also attractive to end users. Most of the vehicle’s other components and software remain the same. Second is hydrogen’s ability to power vehicles as a zero-carbon fuel.Īn original equipment manufacturer (OEM) can build vehicles with hydrogen engines that are very similar to existing internal combustion engines. ![]() First is their similarity with traditional internal combustion engines. Hydrogen internal combustion engines are appealing to vehicle makers for two primary reasons. Hydrogen engines often require an exhaust treatment system to remove this excess NOx.Ĭan hydrogen engines work in medium and heavy-duty trucks and buses? This means that approximately twice as much air needs to be supplied to the cylinders than for a stoichiometric engine. As a result, hydrogen engines are typically tuned to run lean with an excess air ratio of 2 or greater. However, when hydrogen burns with air fuel ratios that are near stoichiometric, a significant amount of NOx can be created. When hydrogen burns in the presence of lots of oxygen, very little NOx is formed. NOx is an atmospheric pollutant which can cause poor air quality and lead to the brown-orange haze that forms above some large cities in the summer. Another solution is to completely design the combustion system for hydrogen.Īnother consideration is the formation of nitrogen oxides, or NOx. If the injection takes place at a time when the inlet valve is closed, backfire conditions are avoided. Direct injection systems introduce fuel–hydrogen, in this case –directly into the cylinders, rather than into the intake manifold or ports. Direct injection is one way to overcome pre-ignition issues. Pre-ignition is a greater problem for hydrogen engines than for gasoline engines, because hydrogen is much easier to ignite. ![]() There are also differences between hydrogen engines and other spark ignited engines such as natural gas and gasoline engines.įor example, differences in the physical properties of hydrogen impacts how fuel and air are metered and injected. It reduces costs and delivers the needed reliability. This economies of scale is critical in the transportation sector’s journey to lower emissions. This high commonality among engine components introduces scale advantages. Our hydrogen engine is a spark ignited engine variant with similar engine hardware to natural gas and gasoline engines. These include an engine block, crank, and installation parts such as mounts and flywheel housings.Īt Cummins Inc., we are leveraging our existing platforms and expertise in spark ignited technology to build hydrogen engines. Four-stroke hydrogen internal combustion engines (Hydrogen ICE) operate on the same cycle as regular natural gas engines and have almost the same components-engine block, crank, cylinder heads, ignition system, installation parts, and so on.ĭiesel engines and hydrogen engines also share similar components. Today, if you saw a modern internal combustion engine designed to run on hydrogen, you might not know that it’s not meant for natural gas. Its inventor, a former Swiss artillery officer named François Isaac de Rivaz, used it to build a vehicle that could carry heavy loads over short distances.ĭiesel engine vs. In fact, one of the very first internal combustion engines ran on a mixture of hydrogen and oxygen-and featured an electric spark ignition mechanism. However, the latter, using internal combustion engines is a more familiar technology. Either method has its advantages and applications where they are best suited. ![]() The other way is hydrogen engines internal combustion engines that burn hydrogen as the fuel. The fuel cell converts hydrogen to electricity, which then powers the vehicle’s electric motors, just like in any electric vehicle. The first way involves a device known as a fuel cell. Using hydrogen to power an engine or motor is more straight forward than you might think.
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