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Bryan
Hagerty Employee

5 of the strangest engines that made it to production

An engine puts the auto in automobile; without one, you merely have a carriage and have successfully shifted yourself backwards by 120 years. A century-plus of engine development has brought forth a vast array of solutions to the internal combustion problem. Virtually every person who has set their mind to building a car has experimented with the number, orientation, and even shape of the cylinders.

 

Read the full article on Hagerty.com:

https://www.hagerty.com/media/automotive-history/5-of-the-strangest-engines-that-made-it-to-producti...

60 REPLIES 60
GoFast
Detailer

In a rotary engine, the output (more accurately eccentric) shaft is not 'geared.' There is, however, one pair of gears per rotor: the smaller one with external teeth is fixed, the larger one with internal teeth is attached to the inside of the rotor.  These gears merely keep the rotor and eccentric shaft motion in phase and do not transmit torque. 

markmathes
Pit Crew

V8-6-4

markmathes
Pit Crew

Quad 4

MMikeJBenN27
Passenger

You are wrong about the Chrysler Turbine engine.  While 130 horses is not earth-shattering in a post-war car, 465 lbs. ft.  is EXCELLENT.  Performance was good.  The reason Chrysler killed the Turbine-as-a-car engine project was super-high production costs, that would have made it impossible to sell at a reasonable price, and, it was discovered in later versions, very high exhaust emissions that seemingly couldn't be cleaned up, which would have made cars so equipped illegal for street use.

lesrof2evils
Pit Crew

How about the  COpper BRAzed engine used in the Crosley?

GoFast
Detailer

The point of Honda's NR750 was that use of oval pistons allowed 8 valves per cylinder for greatly enhanced volumetric efficiency (better breathing).

engineuser
New Driver

Or maybe, 8 valves per combustion chamber?
CircuitBurner
Passenger

That Honda engine was not a 4 cylinder emulating an 8.

It was only two of those pistons emulating their proven V-4 design.

Basically removing the cylinder walls between each pair of V-4 pistons increased displacement allowing a lower friction reduction in bore radius that also ran cooler.

1994scta
New Driver

Just curious of how well the rings sealed? Seems tough to get an even distribution of pressure to the cylinder walls.
engineuser
New Driver
Cytecnick
New Driver

It may have never been put in a car (that I know of ) but Napier-Deltic made one of the strangest, coolest 2 stroke diesel engine designs I've ever seen :