Mazda Motor Corporation has released a pair of vehicles that are hydrogen-powered and runs on an extremely eco-friendly rotary engine. This was a sincere step taken by Mazda towards a greener earth. It was a perfect vehicle for the current environmental scenario, where vehicles should be driven without causing any more pollution.
As we were told by the Tempe Mazda dealer, these hydrogen vehicles from Mazda made headlines with their unique features. Here is a brief on those features that made the hydrogen vehicles distinctive from its competitors.
Hydrogen Rotary Engine
The hydrogen vehicles from Mazda were based on the rotary engine technology but have adapted to make hydrogen to be its fuel, to eliminate CO2 emission and gives exceptional performance on the roads. Engineers from Mazda worked on a few design changes in the rotary engine to make it work with hydrogen, and then Mazda started manufacturing hydrogen-fueled rotary engine vehicles at lower cost.
To add more options, they created a dual-fuel system to allow the vehicle to have alternative options of gasoline or hydrogen to run on. The technology aimed to free the driver from bothering about the vehicle running out of hydrogen, as it can henceforth rely on the gasoline and cover up long distances where there are no hydrogen stations.
Mazda was practical enough to apply hydrogen in the internal combustion engines where avoidance of backfiring or premature ignition became a major issue. In general, Backfiring or ignition is caused by the fuel that meets the hot parts of engine during the fuel intake. In cases of reciprocal engines, the procedures like intake, exhaust, compression and combustion, take place within the cylinders. This results in the ignition of plugs and exhaust valves that reach a high temperature because of the heat created out of combustion and the process of intake.
To avoid such mishaps, the RE structure in Mazda hydrogen vehicles are made free from fuel intake as well as exhaust valves. Moreover, the intake chamber maintaining low-temperature and the combustion chamber of high-temperature got separated avoid backfiring and bring good combustion.
Direct Injection and Premixing
To receive a high-end output through the hydrogen fuel mode, Mazda vehicles used a direct injection system by installing a hydrogen gas injector that is electronically-controlled placed right on the top of the housing of the rotor.
Then, depending on conditions of the vehicle, a gas injector is installed for premixing the intake pipe that enable the combined usage of both. This results in producing optimal level of hydrogen combustion.
Lean Burn and EGR
We got to know from the Tempe area Mazda dealerships that the Lean burn and exhaust gas recirculation known in short as EGR are comprised to reduce the emission of nitrogen oxide (NOx). NOx is reduced primarily by the lean burn when the vehicle is running on low engine speeds, by the EGR and a three-way catalyst during high engine speeds.
Mazda took a revolutionary step by launching the hydrogen vehicles making them run on rotary engine. The dual fuel system made it even more useful and convenient. These were inspirational enough for other automobile makers to take up some responsible steps to protect the environment.