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Mazda's hydrogen rotary engine, based on our unique rotary engine technology but adapted to use hydrogen as its fuel, emits no CO2 and offers superb environmental performance.
Because the rotary engine required only a few design changes to allow it to operate on hydrogen, Mazda was able to build hydrogen-fueled rotary engine vehicles at low cost. Also, a dual-fuel system allows the vehicle to run on either gasoline or hydrogen. The driver does not need to be concerned about running out of hydrogen making the car convenient because it can travel long distances to areas without hydrogen stations.
The RENESIS hydrogen rotary engine employs direct injection, with an electronically-controlled hydrogen gas injector. This system draws in air from a side port and injects hydrogen directly into the intake chamber with an electronically-controlled hydrogen gas injector installed on the top of the rotor housing. The technology illustrated below takes full advantage of the benefits of the rotary engine in achieving hydrogen combustion.
Outline of RENESIS hydrogen rotary engine
In the practical application of hydrogen internal combustion engines, avoidance of so-called backfiring (premature ignition) is a major issue. Backfiring is ignition caused by the fuel coming in contact with hot engine parts during the intake process. In reciprocal engines, the intake, compression, combustion and exhaust processes take place in the same location-within the cylinders. As a result, the ignition plugs and exhaust valves reach a high temperature due to the heat of combustion and the intake process becomes prone to backfiring.
In contrast, the RE structure has no intake and exhaust valves, and the low-temperature intake chamber and high-temperature combustion chamber are separated. This allows good combustion and helps avoid backfiring.
Further, the RE encourages thorough mixing of hydrogen and air since the duration of the intake process is longer than in reciprocal engines.
Aiming to achieve a high output in hydrogen fuel mode, a direct injection system is applied by installing an electronically-controlled hydrogen gas injector on the top of the rotor housing. Structurally, the RE has considerable freedom of injector layout, so it is well suited to direct injection.
Further, a gas injector for premixing is installed on the intake pipe enabling the combined use of direct injection and premixing depending on driving conditions. This produces optimal hydrogen combustion.
When in gasoline fuel mode, fuel is supplied from the same gasoline injector as in the standard gasoline engine.
Lean burn and exhaust gas recirculation (EGR) are adopted to reduce nitrogen oxide (NOx) emissions. NOx is primarily reduced by lean burn at low engine speeds, and by EGR and a three-way catalyst at high engine speeds. The three-way catalyst is the same as that used in the base model. Optimal and appropriate use of lean burn and EGR satisfies both goals of high output and low emissions.
When the system runs out of hydrogen fuel, it automatically switches to gasoline fuel. For increased convenience, the driver can also manually switch the fuel from hydrogen to gasoline at the touch of a button.
Premacy Hydrogen RE Hybrid/ Hydrogen RE Plug in Hybrid
The Premacy Hydrogen RE Hybrid combines Mazda's hydrogen rotary engine with a hybrid system for significantly improved performance and practicality
The Premacy Hydrogen RE Hybrid inherits the dual-fuel system from the Mazda RX-8 Hydrogen RE and combines it with a newly developed hybrid system for greatly enhanced driving performance and practicality. The Premacy Hydrogen RE Hybrid has been available on lease to governmental bodies and companies in Japan since March 2009.
The layout of the Premacy Hydrogen RE Hybrid
The Premacy Hydrogen RE Hybrid produces approximately 40 percent more power than the Mazda RX-8 Hydrogen RE, resulting in significantly enhanced acceleration. It also improves fuel economy. The heart of the vehicle, the hydrogen rotary engine, is switched from a longitudinal to a transverse layout. The engine's reduced intake/exhaust resistance and improved combustion efficiency yields high power output across a wide range of engine speeds.
The hybrid system efficiently converts the hydrogen combustion energy to electricity, which drives the wheels via an electric motor. This setup is extremely energy efficient and provides exceptional vehicle response. As a result, drivers enjoy low fuel consumption as well as direct feel and powerful ride, and driving range of 200 kilometers on hydrogen fuel. For even greater range, the model is equipped with Mazda's dual-fuel system that allows the car run on gasoline as well as hydrogen. Being a Premacy, it is also more user-friendly than the RX-8 Hydrogen RE, offering greater cargo space and seating for five adults.
“Mazda Premacy Hydrogen RE Range Extender EV” based on “Mazda Premacy Hydrogen RE Hybrid”. It adapts plug-in-system, a larger high-voltage battery and a thermal efficiency-improved engine.
The Mazda RX-8 Hydrogen RE, developed and commercialized by Mazda, is the world's first practical implementation of a hydrogen rotary engine vehicle. Without compromising the sensations of torque and acceleration nor the exhaust note unique to internal combustion engines, it emits no CO2 and almost no NOx making it the ultimate “green” car. In Japan, the vehicle has been offered for lease to local governments and enterprises since 2006, and in 2008 Mazda began to participate in the Norwegian hydrogen highway project “HyNor.”
Seating capacity of four adults has been maintained from the base vehicle, with two hydrogen tanks installed in the trunk. The tanks are pressurized to 35 Mpa, the current national standard for hydrogen fueling station. The hydrogen filler valve is the one commonly used in fuel cell vehicles, located on the opposite side of the gasoline filler valve on the base vehicle.
Visit our website for many more details and pictures at www.CourtenayMazda.com
We are a family-run, locally owned and operated dealership in the Comox Valley on Vancouver Island specializing in new and used vehicle sales, and servicing all areas of the Comox Valley including Courtenay, Comox, Campbell River, Parksville, Nanaimo, Victoria and all of Vancouver Island. Call us toll-free at 1-877-458-2110.
Come visit Vancouver Island's Premier pre-owned vehicle location across from Costco and Crown Isle in Courtenay, BC. We have an exceptionally large and fully reconditioned inventory with a complete 155-point inspection on every vehicle! Hundreds more on-line to choose from. We also service all makes and models with 6 service bays, including Toyota, Nissan, Honda, Ford, Dodge, Chevrolet, Chrysler, Hyundai, Jeep, Pontiac, Subaru, Kia, VW, BMW, Mercedes and so many more. Tour our welcoming facility, meet our staff and join us for a coffee!
We are the one of the busiest pre-owned vehicle dealerships on Vancouver Island. Along with our fine line of New Mazda cars and Used Mazda vehicles, we market pre-owned import and domestic brands of quality Cars, Trucks, Vans, CUV’s and SUV’s - you name it and we will find it - and can help you get into the car or truck you need, no matter your current credit situation, without hassle or delay. Let us help you!
For more than 20 years, Courtenay Mazda has been a trusted and respected used car dealer in the Comox Valley on Vancouver Island. We are dedicated to ensuring that you go far in a used car or truck, and it starts with an exclusive inventory of quality, reliable used cars and trucks, and a financing service that can provide you with guaranteed approval, help you restore your credit, and get you the best rate possible for your needs and situation.
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