Hit and miss engine?

[akumabito]

What do you guys think about a modern take on the hit and miss engine? I was just thinking you could engage the hit/miss mode electronically by cutting power to fuel injection and ignition. It would probably work best with engines with a heavy flywheel and coupled to a CVT.. To maintain an average of 2,000 rpm, you accelerate to 2,200 or so, cut fuel and ignition until RPM's fall to 1,800, then reengage and let the RPM's climb back up. would there be any fuel savings at all, or would you spend more fuel accelerating than you'd safe during the 'misses'?

[ConnClark]

Wouldn't this be the same as whats his name was talking about with doing variable displacement without shutting down the valves to the deactivated cylinders?


I pretty sure it wouldn't be good for the O2 sensor or the Cat.

[Diesel_Dave]

They have it--it's called cylinder deactivation

I'm familiar with hit and miss engines. I have a 1927 IHC Type M I'm restoring in the garage (which, technically, is throttle governed not hit and miss, but similar style).

The hit and miss concept was for the purpose of governing speed, not for efficiency. Which, by the way was absolutely awful in those days--as was power density. My IHC weighs ~400 lbs and is only 1.5 hp. It's compression ratio is 3.5 to 1. That should tell you something about the efficiency.

[jakobnev]

You can test this by just flooring the throttle and turning the ignition key on and off! (I assume EFI)