mechanical cars - are there still cars around that don't use electronics

Nedavno Mrcheerful napisa:

So I guess that there is some circuit created in a mechanically driven high pressure pump that allows fuel to spin in circle until the engine stops turning, as I guess that you can not just block the high pressured fuel.

I suppose that if you have a two-stroke engine, it could easily run both ways, depending on how it was started.

Nedavno johannes napisa:

Is a two-stroke diesel engine ever used in a car?

Commer vans certainly had them; 3-cylinder ones IIRC.

Chris

My "tuned" BSA Bantam motorcycle engine certainly could...

Chris

Walk through long grass near sheep, that always works for my dog :)

afaik electronic indicator relays still use an actual relay to switch the bulbs??? if so they just put an extended arm on the moving contact of the relay and let it bang against the case,

No, you kill th elow preeure feed to the pump (that's what the sooenoid does, it's built into the pump for convenience.

Yes, Much buggerin about was spent stopping doing it, you can only get them to run backwards on a mechanical pump if the cam profile will let them (most /might/) & it only tended to happen on engines attached to a hydraulic pump where the pump could be back pressured to reverse spin the engine. (For comedy value nothing beats the twin engined loco I once had to deal with where the two ends where trying to go in opposite directions simultaneously, we did assume the drivers where trying for an afternoon skive until we saw it do it)

Nedavno Duncan Wood napisa:

And the engine runs until all the fuel from the high pressure pump is used (not much I believe)? Wouldn't that allow air to get in the pump (and that is bad as I understand)?

It is not the same as pinching the fuel supply (which would induce a vacuum in the system and might suck in some air) it is more like a bypass.

Actually it is, but the pump stops pumping well before the point of vacuum.

Usually a cut-off solenoid operates. In ye-olden days, you had a cable to pull instead.

Considering that there's a very low likelihood of someone sticking an older engine in a newer car, I'll go with mine thanks.

Even in the face of written evidence you claim you are right?

The fact is that there is nothing to stop someone getting a new car and sticking a morris minor engine in it, it would still pass the MoT emissions standard. It would also satisfy the OP question.

No, I just know what's the most probable.

Apart from the fact it'd cost a fortune to do and for no benefit.

Everyone makes mistakes, just own up to it!

Conor would make a good politician !!!

Some would run backwards and if they did you had a real problem. IIRC the Diesel engine from the Standard Vanguard and the early Massey 25 tractor, and also a Coventry Diesel (I'm sure there were others). They didn't have a mechanical governor on the fuel pump, but rather a bellows operated governor controlled by vacuum created by a venturi in the intake. When running backwards this didn't work and the engine ran up beyond design max revs in a few seconds and kerblammo.

Julian

It happens a *heck* of a lot in the Ford modding scene. Plenty of newer stuff running old school (I believe the term is "old skool") turbocharged CVHs.