Battery Charge Efficiency Calculation
In a Battery Management System (BMS), the efficiency of battery charging can be estimated using the formula:
where:
is the...
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Battery Voltage Drop Estimation
In a Battery Management System (BMS), the voltage drop (V_drop) due to the load can be calculated using the formula:V_drop=I×R
...
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Battery Discharge Time Estimation
In a Battery Management System (BMS), the estimated discharge time (T) of a battery can be calculated as:
where:
is the ...
Battery Life Estimation for a Device
A battery-powered device consumes a constant current while operating. The estimated battery life (T) can be calculated using the...
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Brake Mean Effective Pressure (BMEP)
BMEP is a normalised measure of engine work output per cycle per unit displacement. It lets you compare engines of different siz...
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Volumetric efficiency
Volumetric efficiency measures how well an engine breathes.
The ratio of the actual air mass drawn in per cycle to the theoreti...
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Fuel-Air Equivalence Ratio (Lambda)
Lambda (λ) is the ratio of actual air-fuel ratio to the stoichiometric air-fuel ratio.
λ = 1 is perfect stoichiometry,
λ < 1...
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Engine Displacement
Engine displacement is the total swept volume of all cylinders.
It is determined by bore (cylinder diameter), stroke (piston t...
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Piston Mean Speed
Mean piston speed is a critical mechanical stress indicator.
It sets limits on valve timing, bearing loads and material fatigue...
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Specific Fuel Consumption
Brake-specific fuel consumption (BSFC) measures how efficiently an engine converts fuel mass into useful work.
Modern petrol e...
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Swept Volume and Clearance Volume
The swept volume (V_s) is the volume displaced by the piston as it travels from BDC (Bottom Dead Centre) to TDC (Top Dead Centre...
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Geometric Compression Ratio
The geometric compression ratio CR is the ratio of the total cylinder volume at BDC to the clearance volume at TDC.
It is one ...
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Engine torque and RPM
Torque and power are related through rotational speed. Knowing brake power and engine RPM, you can back-calculate the torque del...
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Engine Thermal Efficiency
The thermal efficiency of an ideal Otto cycle engine depends only on the compression ratio. A higher compression ratio yields gr...
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Problem Set 2
Make a calculator by the four main operators (op):
+
-
*
/
And the two numbers (n1, n2).
Don't forget to check to divisio...
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Problem Set 1
You will get the vector "v", you should put it's length in a variable called "lngth", then...
If it's length from 1 to 5, sz = ...
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Switch-Case-Otherwise
You should make random numbers to 10, by 3 rows and 3 columns.
Cases from 1 to 3, b = true.
Otherwise, b = false.
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NOT
If a not equal to zero, b = true, else, b = false.
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OR
If a greater than zero or c less than 10, b = true, else, b = false.
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AND
If a greater than 0 and n less than 10, b = true, else, b = false.
(Checking a should be in one line by AND special sign in MAT...
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Nested If(s)
If a greater than zero, then check, if a = greater that 1 and less than 10, then b = true, else, b = false.
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If-Elseif-Else
If a more than zero, b = true, if a = zero , b = zero, else, b = false.
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If-Else
If a more than zero, b = true, else, b = false.