,Small,BoreLong,StrokeDiesel,EngineVSBig,BoreShort ,strokeDiesel,Engine

[HUMABOL KA]

Mga experts ask ko lang kung anong mas magandang configuration ng diesel engine let say parehong 2.5 Liter diesel engine

1.ano kaya mas malakas sa akyatan,mas mabilis sa acceleration at mas mabilis sa rektahan
2.ano mas matipid

[perrydel]

Also consider the differential gear or final drive ratio. With high differential ratio 4.1 and
higher, malakas sa akyatan at mabilis sa acceleration. Below 4.1 mabilis sa recta
matipid sa gas kasi mas mababa RPM at the same speed.

[lowslowbenz]

Stroke ratio - Wikipedia, the free encyclopedia

TS: For your better understanding.

[jick.cejoco]

Mga experts ask ko lang kung anong mas magandang configuration ng diesel engine let say parehong 2.5 Liter diesel engine

1.ano kaya mas malakas sa akyatan,mas mabilis sa acceleration at mas mabilis sa rektahan
2.ano mas matipid

assuming all factors the same:
altitude
air temperature
load
speed
fuel quality
ambient atmospheric pressure
designed compression ratio
the difference in fuel economy would not be noticeable. however, the torque for the longer stroke (longer crank throw or over square engine) would be higher since it will have more leverage.
but the engine with shorter crank throw (under square engine) can compensate this with a higher redline or rpm range. what matters now will be the volumetric efficiency specially the intake valve opening time is shortened by the increased speed

[HUMABOL KA]

Also consider the differential gear or final drive ratio. With high differential ratio 4.1 and
higher, malakas sa akyatan at mabilis sa acceleration. Below 4.1 mabilis sa recta
matipid sa gas kasi mas mababa RPM at the same speed.

Yes sir, but when it comes to the configuration of Diesel engines sir totoo bang mas maganda ang performance sa rekta ng mga long stroke diesel engines kesa short stroke diesel engine, let say pareho clang may 4.1 or 3.9 final gear ratio

[yebo]

pag sinabi mong short stroke engine then i take it that piston stroke length < cylinder bore diameter. so, meron bang "short stroke" diesel engine? by requirements of the ignition system (compression ignition so it has to have a high compression ratio) e medyo mahirap yata gawin yan. true na mas mababa na ang compression ratios of new diesel engines now but that is a development due to crdi. because of the higher injection pressures the atomization of fuel is better leading to easier ignition.

but, theoretically, in case in the future they develop a diesel engine fuel than ignites at lower compression ratios...

small bore, long stroke = high compression ratio, high torque (kasi mas malaki ang moment arm. moment arm = 1/2 of the stroke).
large bore, short stroke = lower compression ratio, lower torque (as above, smaller moment arm).

this is why diesels have inherently higher torque output than gasoline engines because the piston stroke > cylinder bore. and this is also why the favorite "btek yo!" of our fav fanbois have the lowest torque of all, because they have engines where bore > stroke. the engine design sacrifices torque for the ability of the engine to rev up faster.

[HUMABOL KA]

assuming all factors the same:
altitude
air temperature
load
speed
fuel quality
ambient atmospheric pressure
designed compression ratio
the difference in fuel economy would not be noticeable. however, the torque for the longer stroke (longer crank throw or over square engine) would be higher since it will have more leverage.
but the engine with shorter crank throw (under square engine) can compensate this with a higher redline or rpm range. what matters now will be the volumetric efficiency specially the intake valve opening time is shortened by the increased speed

Gud aftie sir, for example both engine are 2.5 liter pero ung isa is Bore: 91 x Stroke: 96, then the other one Bore:92 X Stroke:93 meron ba talagang effect yan sa acceleration and rekta and kung meron which one has the advantage assuming nga sir na the rest is equal na

[lowslowbenz]

A general rule, (but very subjective)

Long stroke, small bore engines (undersquare) = high torque
Short stroke, big bore engines (oversquare) = high horsepower

[HUMABOL KA]

pag sinabi mong short stroke engine then i take it that piston stroke length < cylinder bore diameter. so, meron bang "short stroke" diesel engine? by requirements of the ignition system (compression ignition so it has to have a high compression ratio) e medyo mahirap yata gawin yan. true na mas mababa na ang compression ratios of new diesel engines now but that is a development due to crdi. because of the higher injection pressures the atomization of fuel is better leading to easier ignition.

but, theoretically, in case in the future they develop a diesel engine fuel than ignites at lower compression ratios...

small bore, long stroke = high compression ratio, high torque (kasi mas malaki ang moment arm. moment arm = 1/2 of the stroke).
large bore, short stroke = lower compression ratio, lower torque (as above, smaller moment arm).

this is why diesels have inherently higher torque output than gasoline engines because the piston stroke > cylinder bore. and this is also why the favorite "btek yo!" of our fav fanbois have the lowest torque of all, because they have engines where bore > stroke. the engine design sacrifices torque for the ability of the engine to rev up faster.

hehe sori sir mali pala ung term i know na long stoke pala talaga ang diesel engines but what i mean is pag mas longer ba ang stroke mas may advantage ito kesa sa average stroke ng diesel engine

[HUMABOL KA]

A general rule, (but very subjective)

Long stroke, small bore engines (undersquare) = high torque
Short stroke, big bore engines (oversquare) = high horsepower

so sa diesel engines sir is it better to have longer stroke?

[lowslowbenz]

^

Depende sa application mo. Trucks, tractors have long stroke diesel engines.

[jick.cejoco]

Gud aftie sir, for example both engine are 2.5 liter pero ung isa is Bore: 91 x Stroke: 96, then the other one Bore:92 X Stroke:93 meron ba talagang effect yan sa acceleration and rekta and kung meron which one has the advantage assuming nga sir na the rest is equal na

can't have this engine displacement with the given piston diameter and piston travel. this is unrealistic. get the piston area in millimeters multiplied by the stroke in millimeters multiplied by the number of cylinders po

[HUMABOL KA]

can't have this engine displacement with the given piston diameter and piston travel. this is unrealistic. get the piston area in millimeters multiplied by the stroke in millimeters multiplied by the number of cylinders po

hahaha sir actually sa starex Vgt at 2kd-ftv ko po kinuha yan example of Bore x Stroke na yan