Mazda develops two-rotor rotary engine for North American hybrid powertrains

Mazda’s rotary engine is evolving into a two-rotor hybrid system to balance power and emissions compliance.

• Mazda is developing a two-rotor hybrid rotary engine for the American market.

• The dual-rotor design increases the power generated, meeting America’s demand for higher power.

• The Iconic SP’s hybrid system reflects Mazda’s focus on carbon-neutral rotary solutions.

Masahiro Moro, CEO of Mazda, has confirmed the development of a two-rotor rotary engine, which the manufacturer believes is better suited to the requirements of the North American market.

Speaking on the challenges posed by rotary engine development, Mr. Moro explained that the single rotor configuration used in some previous applications was unable to meet the power requirements of these markets. “If we think about the U.S. market, a single rotor is not enough,” Mr. Moro said. He added that the move to two rotors will provide the necessary power while remaining compliant with strict emissions standards.

Mazda to develop production version of Iconic SP concept

The two-rotor engine is part of a broader electrification strategy, exemplified by the sublime Iconic SP concept, unveiled in October 2023. This concept vehicle features a compact two-rotor rotary engine combined with a powertrain. electric. According to Mazda, the hybrid setup increases range and can reduce emissions by up to 90% with carbon-neutral fuels.

Mazda’s chief designer Masashi Nakayama also hinted that the Iconic SP was designed with a production model in mind. This suggests that the hybrid system could also find wider applications in Mazda’s future range.

Although no specific vehicle for the two-rotor hybrid powertrain has been confirmed, its design resembles the range extender setup of the Mazda MX-30 e-Skyactiv R-EV. However, the Iconic SP, with its higher output of 365 hp (272 kW), is much more interesting and in line with Mazda’s goals of combining power and reduced emissions.

In addition to extending the range, the rotary engine could equip future sports cars. A patent filed by Mazda in mid-2024 describes a hybrid system that places a rotary motor behind the front axle to drive the rear wheels. This system also incorporates battery-powered front hub motors.

Mazda’s rotary engine developments are part of a broader effort to keep internal combustion engines (ICEs) relevant. In May 2024, Mazda will join Toyota and Subaru at the Multi-Pathway Workshop to showcase next-generation powertrains, including compact rotary engines and hybrid systems.