Basic specs are open to everyone and include images, displacement, dimensions and weight, essential bolt tightening torques, the characteristics of the engine like its power and torque.
Essential bolt tightening torques are the main bearing cap bolt torque, the connecting rod cap bolt torque and the cylinder head bolt torques.
Simple really, the more power you produce the more fuel you use.
Fuel consumption rate for many makes of Diesel Engines can be found in a range between 0.380 & 0.450 lbs/hp hour; 172 & 181 grams/hp hour; 231 & 243 grams/kW hour.
This does not represent a big difference in fuel consumption per power unit between most normal diesel engines.
Fuel consumption for diesel engines is normally more difficult to express than for petrol engines because of the vast variability in possible applications. Applications like stationary industrial, marine, automotive, and earthmoving are examples of this variability. So it is normal to express this fuel consumption as a rate in terms of the weight of fuel consumed per unit of power produced. A real headache for plant managers!
Now even if an engine operates for long periods at a constant speed it seldom operates at its full rated power. On a dynamometer, engines seem to operate best at about 70% of expected maximum power, they seem quite tireless when operating there.
Still, asset control may be critical for profitable operation so we trust the following formulae & tables may be of some use.
|Unit||Multiply by||to get|
|lbs / hp hour||0.533||liter / hour|
|lbs / hp hour||0.1408||US gal / hour|
|US gal / hour||3.7854||liter / hour|
|liter / hour||0.2642||US gal / hour|
|kg / hour||1.175||liters / hour|
|grams / hour||0.001175||liters / hour|
|Regard all values as approximate|
|Power Unit||Fuel Consumption per hour expressed in|
API - American Petroleum Industry
ARB - In California, the Air Resources Board
ASTM - American Society for Testing and Materials
ASTM D 975 - American standards for fuel and emissions. Fuel outside of this spec has poor atomization, which equates to less power, worse fuel economy and higher toxic emissions.
CARB - California Air Resources Board - Strict fuel and emission controls.
CEN - European Standards Organization
CS - California Standard
EN 590 - European diesel fuel standards
EPA - Environmental Protection Agency - Main US Body legislating the quality and usage of fuel oil and the reduction of emissions in the USA.
FS - US Federal Standard
EU - European Union Standard, EN 590 - European diesel fuel standards
JIS - Japanese Industrial Standard - JIS K 2204 - Japanese standards for fuel and emissions.
ULSD - Ultra Low Sulfur Diesel
WHO - World Health Organization
An engine producing 310 hp at constant speed using 0.350 lbs of diesel per hp hour
uses the following amount of fuel:
310 x 0.350 = 108.5 lbs of diesel per hour
310 x 0.350 ÷ 1.8766 = 57.8 liter per hour
An engine at constant speed producing 231 kW at that speed, & using 0.350 lbs of diesel per hp hour
uses the following amount of fuel:
231 x 1.341 x 0.350 ÷ 1.8766 = 57.8 liter per hour
I am Dinesh & I have a question related calculation of how much L of diesel required for diesel engine. I have diesel engine with 8 cylinders of piston & 625 HP. I studied your page ...there it was written that 'fuel consumption rate for diesel engines is in range between 0.380 &0.450 lbs/hp hour.' My questions are:.... 1. Is the fuel consumption range of 0.380 & 0.450 lbs/hp hour independent of number of cylinders piston? 2. Why is the fuel consumption rate of diesel engines in the range between 0.380 & 0.450 lbs/hp hour?
The number of cylinders does not matter, only the engine power. The 0.380 to 0.450 comes from engine spec sheets, but it can be regarded as 'argumentum ex silentio' that is good until we have more evidence to the contrary. I would love to get more evidence, can you provide any?
Page Revision #22.1RS 06-17