Mazda All But Confirms Rotary Range Extender Engine For Electric Car

Mazda has patented new rotary engine technology in the US, but it won’t be arriving under the hood of a sports car.

Autoblog has discovered two new U.S. patents filed by Mazda, the first of which is for a small rotary engine that acts as a range extender in a plug-in hybrid EV. Back in 2013, we saw a Mazda2 prototype that used essentially the same setup as described in the patent, which is an electric motor driving the front wheels while a small 0.33-liter rotary engine is mounted in the rear and helps to keep the lithium-ion batteries charged.

In the second patent, Mazda is protecting a start-stop system designed specially for rotary engines. Since the position of the rotor affects the intake and exhaust ports being open or closed, it needs to stop in a specific position that keeps the intake closed to make sure no fuel or exhaust exits the intake. This would help with fuel economy, while a separate system, that would fire a spark plug after fuel flow has been cut is described that would help to reduce emissions.

SEE ALSO: How the 2017 Mazda CX-5 Became as Quiet as a BMW Inside

This engine is also listed as a range extender, which makes inherent sense for a rotary based on its natural advantages, those being its small size, light weight and high power-to-displacement ratio. Keeping the engine small and light would help with overall fuel economy and packaging.

Of course, Mazda hasn’t alluded to production for a new rotary engine, so for now, all we have is a patent. But it at least confirms that Mazda hasn’t forgotten about the rotary engine.

[Source: Autoblog]

Discuss this story at our Mazda Forum

Filed under: Electric Cars Featured Articles Japanese Mazda

Tags: Mazda, mazda rotary, mazda rotary engine, Mazda rotary patents

Source :

Thank you for visit my website
Mazda Files New Rotary Engine Patents in the US
Why Mazda Believes the Rotary Engine Makes a Great Range Extender
Mazda's Rotary Engine Will Finally Return In 2019 As A Range Extender In An EV: Report
Mazda rotary engine returning in 2019 as EV range extender, exec says
Mazda Rotary May Get A New Lease On Life As A Range Extender Engine
Mazda Boss Reveals More About Rotary Range Extender
Mazda throws hat partially into electric car ring, may use rotary range extender
Mazda’s Rotary Engine Might Appear in a New Toyota Project, But You’re Going to Be Disappointed
Mazda Rotary Could Serve as Range Extender in Autonomous Toyota EV
Mazda throws hat partially into electric car ring, may use rotary range extender