Premacy Hydrogen RE Hybrid Under Development To Begin Commercial Leasing

The new Premacy Hydrogen RE Hybrid is an innovative concept car combining the hydrogen rotary engine and a hybrid system. It was first showcased as a reference exhibit at the 40th Tokyo Motor Show in 2007 and is now under development to begin commercial leasing in fiscal year 2008.
While borrowing some technology from the RX-8 Hydrogen RE, such as hybrid system that substantially increases its driving range and power.

Realizing the excitement and power of Zoom-Zoom! Advanced hydrogen RE power unit

In the new Premacy Hydrogen RE Hybrid, the power unit output is increased by 40 percent compared to the RX-8 Hydrogen RE, significantly boosting acceleration and improving fuel efficiency.
The core hydrogen rotary engine has been mounted transversely, instead of the conventional longitudinal arrangement. This change, as well as reduced intake and exhaust resistance and improved combustion, resulted in high power output over a wide range of engine speeds.

With the addition of the newly-developed hybrid system mated to the hydrogen rotary engine, torque at low engine speeds, and fuel economy, have also been improved. The driving range in hydrogen fuel mode has also been extended to approximately 200 kilometers, about twice as far as the RX-8 Hydrogen RE. The hybrid system is extremely efficient in converting hydrogen combustion energy into electric energy to drive the motor.

With its high energy efficiency and excellent response, the driver can enjoy a powerful ride with low running costs, while synchronization of the accelerator, rotary engine and electric motor provides a direct feel.
Additionally, Mazda's dual-fuel system, which i

s highly regarded by RX-8 Hydrogen RE customers because it allows the driver to switch to gasoline fuel, also features on the Premacy HRE Hybrid to maximize convenience.
The new Premacy Hydrogen RE Hybrid is an innovative hydrogen rotary engine vehicle that promotes eco-friendly Zoom-Zoom driving, which is what Mazda has targeted since beginning development of the RX-8 Hydrogen RE.

Energy flow patterns for different driving conditions

The main components of the hybrid system are a hydrogen rotary engine, a generator, an inverter, an electric motor and a battery. Power generation, charging and discharging are optimized in accordance with driving conditions.

• Start up Battery power

• Steady running Driven by hydrogen rotary engine and generator

• Acceleration Driven by hydrogen rotary engine and generator + battery

• Deceleration Energy is recovered by the motor when braking and when using the engine as a brake. The recovered energy replenishes the battery.

• Idling The engine automatically switches off. If necessary, it will restart and charge the battery.

Source: Mazda News Release