Two-stroke Engines Still Seek Sweet Smell Of Success — Chicago Tribune

22 Янв 2015 | Author: | No comments yet »
Toyota AXV-IV

Two-stroke Engines Still Sweet Smell Of Success

it on bad breath.

If it weren’t for that, the engine-lightweight, powerful and reliable-might be a technology for passenger cars.

The engine has enormous potential, David Cole, director of the for the Study of Automotive Transportation at the of Michigan in Ann Arbor. If it is successful, it greatly affect the future of cars.

Cole, an authority on development, said that all automakers are looking at the engine its ability to meet future standards will determine the two-stroke thrives or goes on the research-and-development shelves.

A new engine has to be practical for a long time, not a few years, Cole said.

The two-stroke engine differs the conventional four-stroke design in every piston downstroke is a stroke. The four-stroke requires movements (intake, compression, and exhaust) for each power Two-stroke engines, which the intake and compression strokes and and power strokes, don’t valves, valve springs and But problems have arisen in fuel and air efficiently, in having laden with unburned and in engine life.

Domestic Chrysler Corp. Ford Co. and General Motors Corp. are time and money to try to develop affordable two-strokes. Chrysler, wowed auto-show visitors the country with a two-stroke car, has joined forces Diesel Technology Corp. and Marine Division of Brunswick to produce the External Breathing Injection design.

In England last summer, launched the first of 60 two-stroke test vehicles from of Europe. The automaker has a licensing with Orbital Engine Co. an operation with a Michigan which claims leadership in development.

Our work with 1200cc, 80-horsepower engines is a experience, said Ford Rex Greenslade in Dearborn, Mich. We conceivably do some low-volume of such vehicles in Europe in this decade.

Ford call for a larger, six-cylinder suitable for a vehicle such as the he said. And Jaguar also is on a two-stroke six.

The current two-stroke boasts a 15 fuel-economy advantage over the design, he added.

There are many unknowns, including and degradation of components and engine-mounting

We need more experience, said.

General Motors its dramatically styled, 1,400-pound four-passenger concept car at shows in

The vehicle is powered by a two-stroke that delivers 100 miles per in highway driving at 50 m.p.h. Ford, GM has a working relationship Orbital.

Automakers in the Far East and though not all actively involved in its also are keeping an eye on attempts to the two-stroke a viable alternative to the

Toyota AXV-IV

Toyota, which displayed the 2+2 with a 64-horsepower two-stroke at the Frankfurt, Germany, auto a year ago, said it had no update to report.

Honda, motorcycle and power-tools businesses made it one of the world’s largest and users of two-stroke engines, demurred.

I’m sure RD has looked at it, said Jeff in Honda North America’s office. I don’t think anything going on.

At the Illinois of Technology in Chicago, Francisco said he thought practical could be on the road in the U.S. in five years.

But, he cautioned, marketing will have to convince that the two-stroke is as good as the four-stroke.

The IIT professor of mechanical and engineering, who has applied for patents on of his work with a two-stroke conceded that development of the is a kind of Catch-22. Ruiz the four-stroke design is keeping

The four-stroke engine keeps better and better in terms of and economy, he said. While the has the potential to be more powerful the four-stroke, it’s not always to run.

Ruiz said proposed liquid-only fuel if it could be made to work, simplify the engine design and cut on parts.

The University of Michigan School of William Ribbens said and electronic engine controls are the to two-stroke success.


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