Mazda5 Hydrogen RE
07-24-2006, 09:35 PM
#1
Mazda5 Hydrogen RE
Don't know if you all have read this or not.
Could not find anything in a search.
This is from the Mazda Newsroom.
Mazda5 Hydrogen RE Hybrid Concept
Zoom-Zoom Performance with Low Emissions
Also on stage at Geneva 2006 is an eco-friendly concept vehicle, the Mazda5 Hydrogen RE Hybrid, which employs Mazda's unique hydrogen rotary engine technology with an electric motor. This concept combines Zoom-Zoom performance with very low emissions, and is a further example of the flexibility and environmental potential of Mazda's rotary-engine technology. Placed in a transverse, front-wheel drive layout, the hybrid engine allows optimal packaging for a Mazda5 concept that seats five people without sacrificing comfort.
Mazda Motor Corporation has consistently applied its engineering expertise to develop viable hydrogen-fuel rotary engines with the goal of reducing harmful emissions without sacrificing Mazda Zoom-Zoom driving fun. After introducing the rear-wheel drive Mazda RX-8 Hydrogen RE concept two years ago in Geneva, Mazda now introduces a front-wheel drive hydrogen rotary engine concept in its roomy, compact multi-activity vehicle (MAV), Mazda5, combined this time with hybrid technology. This concept is the latest test vehicle from over 15 years of Mazda alternative fuel development that began with the Mazda HR-X in 1991 and includes an experimental MX-5 hydrogen rotary vehicle, and fuel-cell electric vehicles.
A turning point in Mazda's eco-friendly engine development, however, came with the launch of Mazda RX-8's revolutionary RENESIS rotary engine in 2003, which won a total of four International Engine of the Year awards in 2003 and 2004. This naturally-aspirated petrol rotary engine delivers a marked improvement in both emissions (achieving Euro Stage IV compliance) and fuel consumption compared to Mazda's previous generation of turbocharged rotary engines, while retaining and even improving the traditional strengths of the rotary engine concept -- smooth, high-rev performance and power delivery in a very compact size. Over 15 years of developing hydrogen-fuel rotary engines was applied to this new rotary generation and Mazda engineers quickly developed and built a dual-fuel hydrogen/petrol version of RENESIS. This version of the RX-8 is planned for fleet leasing in Japan this spring (2006), which is earlier than scheduled.
With the Mazda5 Hydrogen RE Hybrid, all three of these technologies -- petrol, hydrogen and electric -- come together one concept vehicle. Onboard is RENESIS rotary engine performance using either hydrogen or petrol as fuel, and the advantages of a 30 kW/40 PS electric motor, which enhances torque and further lowers fuel consumption by facilitating idle-stop.
Comfort and Interior Space
The Mazda5 Hydrogen RE Hybrid concept vehicle is the next step in Mazda's eco-friendly engine technology, and proves once again the flexibility of the rotary engine. By virtue of its compact size, RENESIS could be redesigned for a Mazda5 in an east-west, front-wheel drive layout -- in the RX-8, it has a front engine, rear-wheel drive layout -- leaving enough room in the engine compartment for the electric motor. The batteries of the electric motor and the petrol fuel tank could be located under the second row seats where they do not take away space in the interior. This in turn allowed engineers to place the high-pressure hydrogen fuel tank where Mazda5's third row of seats would normally be, with space behind the tank for luggage. They also added a tray on top of the tank to transport smaller items. The Mazda5 Hydrogen RE Hybrid, then, is a five-seat compact MAV that retains interior comfort, despite having three different power sources.
The concept not only delivers the comfort expected of a five-seat Mazda5, its low emissions and fuel consumption would mean additional benefits for buyers whenever it would eventually go into production. And since the petrol-only version of the RENESIS rotary powerplant requires just minor engine changes to use hydrogen, it would be inexpensive to adapt and produce.
Mazda Hybrid Technology -- The Advantages of Electric Motor Support
The Mazda5 Hydrogen RE Hybrid concept employs a dual-fuel system that is supported by a 30 kW/40 PS electric motor. The hybrid electric motor system is an especially eco-friendly aspect of this aggregate, since it stops the engine in some driving situations (standing at a traffic light, for instance) to save fuel, then restarts the engine when the driver is ready to pull away again. The electric motor also helps to ensure superior engine response during acceleration by supplementing the engine's torque. During deceleration the motor functions as a generator, recovering braking energy and using it to charge the battery.
Mazda Hydrogen Rotary Engine Technology
Working in conjunction with the electric motor of the Mazda5 Hydrogen RE Hybrid concept is the RENESIS dual-fuel hydrogen/petrol rotary engine. This system is designed to be especially easy and practical to use in real world driving and features "on the fly" fuel selection, which allows the driver to switch from hydrogen to petrol mode without stopping the car. This is useful on long journeys or when driving through areas where there is no hydrogen infrastructure. The selection switch is located on the instrument panel in front of the driver. If the concept vehicle runs out of hydrogen during hydrogen-mode operation, it automatically switches to petrol mode.
The Mazda5 Hydrogen RE Hybrid engine is supplied with hydrogen gas by an electronically controlled direct-injection system. With each of the engine's two rotor housings, air is drawn through a side port and hydrogen is injected directly into the induction chamber by an electronically controlled gas injector on the top of the rotor housing. There are several engine technologies employed to maximize the benefits of the rotary engine in hydrogen-combustion mode, including:
Backfire Suppression
Unlike a reciprocating engine, a rotary engine has separate low-temperature induction chambers and high-temperature combustion chambers. With the RENESIS hydrogen rotary engine, therefore, there is no risk of ignition in the part of the operating cycle in which hydrogen is injected. In other words, the Mazda5 Hydrogen RE Hybrid concept's rotary engine realizes superior combustion without ever backfiring.
Direct Injection + Exhaust-gas Recirculation (EGR)
The concept's rotary engine, with its separate induction and combustion chambers, ensures a safer temperature -- compared to the higher temperatures here of a conventional piston engine -- for fitting the hydrogen injectors with their rubber seals. This allows the gas injectors to be mounted directly on the rotor housings beside the induction chambers for direct-injection.
In accordance with driving conditions, the direct-injection arrangement is optimally combined with a system that injects fuel into the intake manifold. An EGR system complements the fuel-supply arrangement to further enhance the engine's combination of high power and low exhaust emissions.
Excellent Mixing of Hydrogen and Air
A rotary engine also has a more vigorous intake flow and a longer operating cycle than a piston engine. This allows for an optimal mixing of the hydrogen-air intake charge and contributes to a uniform mixture, which is critical for hydrogen combustion.
Safety
The Mazda5 Hydrogen RE Hybrid is equipped with sensors to detect leakage of hydrogen gas and prevent accidents. These sensors are located in the engine compartment, cabin and fuel tank. Warning of gas leakage is indicated by these sensors and they close the safety valve installed in the hydrogen tank.
* DISI: Direction Injection Spark Ignition
Mazda5 Hydrogen RE Hybrid Concept Specifications
Body and chassis
Seating capacity
5
Overall length
mm
4505
Overall width
mm
1745
Overall height
mm
1615
Wheelbase
mm
2750
Engine
RENESIS hydrogen rotary engine with dual-fuel system
Maximum output*
kW / PS
Hydrogen mode: 80 / 109
Petrol mode: 154 / 210
Maximum torque*
Nm / kgm
Hydrogen mode: 140 / 14.3
Petrol mode: 222 / 22.6
Fuel
Hydrogen and petrol
Electric motor
Type
AC synchronous
Maximum output
kW / PS
30 / 40
Battery
Type
Nickel hydride
Tyres
Front/rear
195/65R15
* Output from the Mazda RX-8 Hydrogen RE vehicle
Could not find anything in a search.
This is from the Mazda Newsroom.
Mazda5 Hydrogen RE Hybrid Concept
Zoom-Zoom Performance with Low Emissions
Also on stage at Geneva 2006 is an eco-friendly concept vehicle, the Mazda5 Hydrogen RE Hybrid, which employs Mazda's unique hydrogen rotary engine technology with an electric motor. This concept combines Zoom-Zoom performance with very low emissions, and is a further example of the flexibility and environmental potential of Mazda's rotary-engine technology. Placed in a transverse, front-wheel drive layout, the hybrid engine allows optimal packaging for a Mazda5 concept that seats five people without sacrificing comfort.
Mazda Motor Corporation has consistently applied its engineering expertise to develop viable hydrogen-fuel rotary engines with the goal of reducing harmful emissions without sacrificing Mazda Zoom-Zoom driving fun. After introducing the rear-wheel drive Mazda RX-8 Hydrogen RE concept two years ago in Geneva, Mazda now introduces a front-wheel drive hydrogen rotary engine concept in its roomy, compact multi-activity vehicle (MAV), Mazda5, combined this time with hybrid technology. This concept is the latest test vehicle from over 15 years of Mazda alternative fuel development that began with the Mazda HR-X in 1991 and includes an experimental MX-5 hydrogen rotary vehicle, and fuel-cell electric vehicles.
A turning point in Mazda's eco-friendly engine development, however, came with the launch of Mazda RX-8's revolutionary RENESIS rotary engine in 2003, which won a total of four International Engine of the Year awards in 2003 and 2004. This naturally-aspirated petrol rotary engine delivers a marked improvement in both emissions (achieving Euro Stage IV compliance) and fuel consumption compared to Mazda's previous generation of turbocharged rotary engines, while retaining and even improving the traditional strengths of the rotary engine concept -- smooth, high-rev performance and power delivery in a very compact size. Over 15 years of developing hydrogen-fuel rotary engines was applied to this new rotary generation and Mazda engineers quickly developed and built a dual-fuel hydrogen/petrol version of RENESIS. This version of the RX-8 is planned for fleet leasing in Japan this spring (2006), which is earlier than scheduled.
With the Mazda5 Hydrogen RE Hybrid, all three of these technologies -- petrol, hydrogen and electric -- come together one concept vehicle. Onboard is RENESIS rotary engine performance using either hydrogen or petrol as fuel, and the advantages of a 30 kW/40 PS electric motor, which enhances torque and further lowers fuel consumption by facilitating idle-stop.
Comfort and Interior Space
The Mazda5 Hydrogen RE Hybrid concept vehicle is the next step in Mazda's eco-friendly engine technology, and proves once again the flexibility of the rotary engine. By virtue of its compact size, RENESIS could be redesigned for a Mazda5 in an east-west, front-wheel drive layout -- in the RX-8, it has a front engine, rear-wheel drive layout -- leaving enough room in the engine compartment for the electric motor. The batteries of the electric motor and the petrol fuel tank could be located under the second row seats where they do not take away space in the interior. This in turn allowed engineers to place the high-pressure hydrogen fuel tank where Mazda5's third row of seats would normally be, with space behind the tank for luggage. They also added a tray on top of the tank to transport smaller items. The Mazda5 Hydrogen RE Hybrid, then, is a five-seat compact MAV that retains interior comfort, despite having three different power sources.
The concept not only delivers the comfort expected of a five-seat Mazda5, its low emissions and fuel consumption would mean additional benefits for buyers whenever it would eventually go into production. And since the petrol-only version of the RENESIS rotary powerplant requires just minor engine changes to use hydrogen, it would be inexpensive to adapt and produce.
Mazda Hybrid Technology -- The Advantages of Electric Motor Support
The Mazda5 Hydrogen RE Hybrid concept employs a dual-fuel system that is supported by a 30 kW/40 PS electric motor. The hybrid electric motor system is an especially eco-friendly aspect of this aggregate, since it stops the engine in some driving situations (standing at a traffic light, for instance) to save fuel, then restarts the engine when the driver is ready to pull away again. The electric motor also helps to ensure superior engine response during acceleration by supplementing the engine's torque. During deceleration the motor functions as a generator, recovering braking energy and using it to charge the battery.
Mazda Hydrogen Rotary Engine Technology
Working in conjunction with the electric motor of the Mazda5 Hydrogen RE Hybrid concept is the RENESIS dual-fuel hydrogen/petrol rotary engine. This system is designed to be especially easy and practical to use in real world driving and features "on the fly" fuel selection, which allows the driver to switch from hydrogen to petrol mode without stopping the car. This is useful on long journeys or when driving through areas where there is no hydrogen infrastructure. The selection switch is located on the instrument panel in front of the driver. If the concept vehicle runs out of hydrogen during hydrogen-mode operation, it automatically switches to petrol mode.
The Mazda5 Hydrogen RE Hybrid engine is supplied with hydrogen gas by an electronically controlled direct-injection system. With each of the engine's two rotor housings, air is drawn through a side port and hydrogen is injected directly into the induction chamber by an electronically controlled gas injector on the top of the rotor housing. There are several engine technologies employed to maximize the benefits of the rotary engine in hydrogen-combustion mode, including:
Backfire Suppression
Unlike a reciprocating engine, a rotary engine has separate low-temperature induction chambers and high-temperature combustion chambers. With the RENESIS hydrogen rotary engine, therefore, there is no risk of ignition in the part of the operating cycle in which hydrogen is injected. In other words, the Mazda5 Hydrogen RE Hybrid concept's rotary engine realizes superior combustion without ever backfiring.
Direct Injection + Exhaust-gas Recirculation (EGR)
The concept's rotary engine, with its separate induction and combustion chambers, ensures a safer temperature -- compared to the higher temperatures here of a conventional piston engine -- for fitting the hydrogen injectors with their rubber seals. This allows the gas injectors to be mounted directly on the rotor housings beside the induction chambers for direct-injection.
In accordance with driving conditions, the direct-injection arrangement is optimally combined with a system that injects fuel into the intake manifold. An EGR system complements the fuel-supply arrangement to further enhance the engine's combination of high power and low exhaust emissions.
Excellent Mixing of Hydrogen and Air
A rotary engine also has a more vigorous intake flow and a longer operating cycle than a piston engine. This allows for an optimal mixing of the hydrogen-air intake charge and contributes to a uniform mixture, which is critical for hydrogen combustion.
Safety
The Mazda5 Hydrogen RE Hybrid is equipped with sensors to detect leakage of hydrogen gas and prevent accidents. These sensors are located in the engine compartment, cabin and fuel tank. Warning of gas leakage is indicated by these sensors and they close the safety valve installed in the hydrogen tank.
* DISI: Direction Injection Spark Ignition
Mazda5 Hydrogen RE Hybrid Concept Specifications
Body and chassis
Seating capacity
5
Overall length
mm
4505
Overall width
mm
1745
Overall height
mm
1615
Wheelbase
mm
2750
Engine
RENESIS hydrogen rotary engine with dual-fuel system
Maximum output*
kW / PS
Hydrogen mode: 80 / 109
Petrol mode: 154 / 210
Maximum torque*
Nm / kgm
Hydrogen mode: 140 / 14.3
Petrol mode: 222 / 22.6
Fuel
Hydrogen and petrol
Electric motor
Type
AC synchronous
Maximum output
kW / PS
30 / 40
Battery
Type
Nickel hydride
Tyres
Front/rear
195/65R15
* Output from the Mazda RX-8 Hydrogen RE vehicle
07-25-2006, 09:16 AM
#2
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Join Date: Mar 2006
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Nice find! I've wanted to read more about the Hydrogen RE project and this is a great taste. I'd like to hear more about it after some long testing in the field.
One of the main reasons I bought my RX-8 is becuse I think this current gasoline engine technology generation is coming to an end (rotary-wise and piston-wise too). Even though there are a few high-profile cars in the works (Supra, Chevy Camero), I think in the next 5 to 10 years, most of the engine technology in cars will be augmented with 2 or more sources of power.
I predict gas stations in the future will be multi-energy sourced. The station will be broken into section for Petrol, Ethanol (if it ever catches on), Diesel, and possibly hydrogen.
cool stuff.
One of the main reasons I bought my RX-8 is becuse I think this current gasoline engine technology generation is coming to an end (rotary-wise and piston-wise too). Even though there are a few high-profile cars in the works (Supra, Chevy Camero), I think in the next 5 to 10 years, most of the engine technology in cars will be augmented with 2 or more sources of power.
I predict gas stations in the future will be multi-energy sourced. The station will be broken into section for Petrol, Ethanol (if it ever catches on), Diesel, and possibly hydrogen.
cool stuff.
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