One stop shop auto math and knowledge

06/14/2024

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05/10/2020

Hello again everyone today we will be going over the differences between the heat ignition engines (Diesel engines) and engines aided with cumbustion via a spark plug

The main difference is well diesels do not have spark plugs to aid in cumbustion but rather rely on heated air during the compression stroke (a measurable amount of gas contains a certain quantity of heat when compressed you localize that heat in a smaller volume) that air is hot enough to ignite the atomized fuel injected by the fuel injectors.

Engines that rely on spark plugs to induce ignition rely on compressing a fuel air mixture, that mixture is compressed then the spark plug fires creating a flame front that expands pushing the piston down (or turning a rotor in rotory engines)

Diesel engines are known for there durability because they are often overbuilt meaning since they have to handle such high pressure are often stronger then their spark plug counter parts, Diesel engines are often more fuel efficient and have a higher volumetric and thermodynamic efficiency

03/01/2020

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03/01/2020

How to find indicated horsepower​

Horsepower = (P × L × A × N) ÷ 33,000

P = cylinder pressure (mean effective pressure in psi) (MEP)

L = length of the stroke in feet (stroke ÷ 12)

A = piston area in square inches (bore2 × 0.7854)

N = number of power strokes per minute [(RPM ÷ 2) x number of cylinders.

33,000 represents 1 horsepower

Horsepower = (MEP × stroke × bore2 × 0.7854 x number of cylinders) ÷ (12 × 2 × 33,000)”

Now it’s all plug and play!!

02/23/2020

Turbochargers and super chargers

Turbocharger- a turbine driven off of the engines exhaust gasses

As you can see the left portion is where exhaust gasses enter and push on the turbine to spin it while a shaft connects the two turbines together thus turning the front turbine to suck in air which later goes to the engine intake

Supercharger- a belt driven device much like a turbocharger that does not use exhaust gasses to turn the turbine but rather a belt from the engine

02/22/2020

Thank you we have reached 200 likes, once again thank you our website will be up soon!

02/19/2020

Feel free to head over to our blog, it’s filled with great information like you see her

1stopshopautomath.car.blog

02/18/2020

Calculating torque from horsepower

Torque= (horsepower x 5252) ÷ engine rpm

The reason why the constant of 5252 is if you look at dyno charts etc. torque and horsepower always meet at 5252 this is because one horsepower is defined as 33,000 lb-ft / minute. The circumference of a one-foot radius circle is 6.2832 feet. Since these are both constants, you can divide 33,000 by 6.2832 to get 5252. Keep in mind this only happens with imperial units

Or

Power= torque/radius x 2πr(rpm)

Power= torque x 2πr(rpm)

1hp= 33,000 lb-ft / minute

Power= torque x 2πr(rpm)
————————————-
33,000

2π
————
33,000

1
———
5,252

Hp= torque(rpm)
—————-
5,252

02/18/2020

Here are some internal combustion piston engine basics for beginners!

Cylinder Bore- the diameter of a single cylinder

Stroke- the distance the piston travels from the top to the bottom commonly referred to as TDC top dead center and TBC top bottom center

Piston- a short cylinder that fits snug within the engines cylinder which moves up and down against a liquid or gas (in an engine case a fuel air mixture)

Crankshaft- a shaft that turns reciprocating motion of a piston(s) into rotational motion

Rpm- an abbreviation for revolutions per minute, mostly referring to the rotations per minute the crankshaft is spinning

Horsepower- horsepower is a unit of measurement equivalent to 550 foot pounds per second

Torque- a twisting force, in a engine it is the force of the piston turning the crankshaft

02/18/2020

A place to share and expand automotive knowledge

Well welcome to my page, this as said in the title will be filled with a plethora of knowledge specifically pertaining to the automotive field. If you would like to see some specifics of thing you would like to see or would help others you can contact me.

02/17/2020

A message to everyone who has joined thank you!! We are currently working on a website and app to make it quick and easy for member to find equations to automotive math for personal use and a center for knowledge to folk you do and old to learn the true beauties of the automotive world! Once again thanks you!!

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02/17/2020

Until we get our website up and running follow 1stopshopautomath.car.blog