Oil & Fuel General diesel question

[AndyMA]

But when the throttle lever is set, if you approach a hill, or aquire more load, you have to adjust the lever accordingly.

These commenst about "lever" control are interesting. while I use the lever for tasks like mowing and setting up constant PTO speed, I almost always use the foot throttle for basis operations and loader operations.

Must be the non-hydro in me
Andy

 

[N80]

I've seen those. And I agree. There are devices made during the middle ages that have been called 'computers'. However, by today's definition and our understanding of what a computer is, there aren't many, if any, mechanical devices that fit the contemporary definition. That's why I referenced a mechanical alarm clock. You 'program' it to accomplish a task at a certain time, but few would refer to it as a computer. Few people ever even referred to a traditional cash register or adding machine as a computer either although by strict definition they probably were. An abacus too. But, calling any mechanical device a computer in the computer age, really has little utility. And by stretching the definition too far, one could call a manual post hole digger a computer.

 

[Soundguy]

Almost all my seat time is mowing.. thus the hand lever is my 'cruise control'.

My loader tractors don't have anything other than lever control.. so.. that's what I use... ironically my 7610s has foot throttle as well.. and almost never gets used unless i'm on the hiway.... and then the brakes are locked together as well..

soundguy

 

[Soundguy]

I've seen those. And I agree. There are devices made during the middle ages that have been called 'computers'. However, by today's definition and our understanding of what a computer is, there aren't many, if any, mechanical devices that fit the contemporary definition. That's why I referenced a mechanical alarm clock. You 'program' it to accomplish a task at a certain time, but few would refer to it as a computer. Few people ever even referred to a traditional cash register or adding machine as a computer either although by strict definition they probably were. An abacus too. But, calling any mechanical device a computer in the computer age, really has little utility. And by stretching the definition too far, one could call a manual post hole digger a computer.

Looking up definitions in the web and in print seem to say that the basic definition of a computer is that it is a programmable machine.. that's the basic tenent. IE. a device that computes.

Here's a quote from searchwinit.com:

"Most histories of the modern computer begin with the Analytical Engine envisioned by Charles Babbage following the mathematical ideas of George Boole, the mathematician who first stated the principles of logic inherent in today's digital computer. Babbage's assistant and collaborator, Ada Lovelace, is said to have introduced the ideas of program loops and subroutines and is sometimes considered the first programmer. Apart from mechanical calculators, the first really useable computers began with the vacuum tube, accelerated with the invention of the transistor, which then became embedded in large numbers in integrated circuits, ultimately making possible the relatively low-cost personal computer"

Merriam-webster even backs this up.. any device that computes. Also goes on to say that the means for the computation can be analog in nature and measured in rotations. etc.

The fact that we have hi-tech today does not negate clever low tech of yesterday.

a flintlock or matchlock firearm and a modern GE-made minigun are both firearms.. vastly different in scope. when ou break it down to function.. both send projectiles down range.. so would an inner-city 'zip ' gun made from a piece of pipe and a nail... form does not diminish function.

soundguy

 

[irvingj]

Snow Ridge-- yes, going back a few posts... I was thinking about that; of course my Jetta is small. I feel for anyone who has a 1/2 to 1 ton diesel pickup these days. I should think they would be a lot more expensive to run in terms of fuel than a gasser. I consider myself fortunate that I don't need such a vehicle for my livelihood. Darn it, for the refining involved, diesel should cost less than gasoline.

 

[ccsial]

But it doesn't.

But it does, by most definitions. At least when I went to engineering school.

One defintion considers a thermometer to be an analog computer.

The injection pump measure throttle position and engine RPM and computes the amount of fuel needed to keep the RPM equal to throttle position.

But then, there is really no point in discussing this one anymore. This is just semantics.

analog computer Definition - PC Magazine
Analog Computer Museum - Main Page

 

[Reg]

But it doesn't.

The term computer comes from compute, which means to determine something by mathematical means. In the case of a mechanical fuel injection pump, all the computations were done by engineers during the design process. The pump itself doesn't compute anything. It is nothing more than a bit of precision machinery that operates in an entirely predetermined manner and delivers the correct amount of fuel according to the position of the throttle and the engine speed at any given moment. The amount of fuel for any given combination of RPM and throttle position having been previously computed by the engineers.

Analog Computer, look it up.
WIKI sez;
An analog computer (spelt analogue in British English) is a form of computer that uses continuous physical phenomena such as electrical,[1] mechanical, or hydraulic quantities to model the problem being solved.
{copy/pasted, the "spelt" is a Wiki original}

 

[SnowRidge]

Analog Computer, look it up.
WIKI sez;
An analog computer (spelt analogue in British English) is a form of computer that uses continuous physical phenomena such as electrical,[1] mechanical, or hydraulic quantities to model the problem being solved.
{copy/pasted, the "spelt" is a Wiki original}

But first we need to look up the term computer itself. Here's Wiki:

"A computer is a machine that manipulates data according to a list of instructions."

That's not the only definition, but it is a pretty good one. Mechanical injection pumps don't even come close to meeting it.

 

[ccsial]

But first we need to look up the term computer itself. Here's Wiki:

"A computer is a machine that manipulates data according to a list of instructions."

That's not the only definition, but it is a pretty good one. Mechanical injection pumps don't even come close to meeting it.

Wiki should be more specific here. That definition is for a DIGITAL computer. Analog computers don't have lists of instructions.

A simplified linear function of a fuel injection pump could be expressed as follows:

Fuel amount = (throttle setting - RPM) * gain factor

A digital computer would process the same function according to a list of instructions. Either way it is a "computation".

 

[jsborn]

But first we need to look up the term computer itself. Here's Wiki:

"A computer is a machine that manipulates data according to a list of instructions."

That's not the only definition, but it is a pretty good one. Mechanical injection pumps don't even come close to meeting it.

Mechanical injectors meet this requirement perfectly! The desigener puts the instructions in the pump as part of its design these instructions are not as easily changed but they are none the less there.