Technical Questions On Cars
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Post all your questions on cars technical only here and whoever knows please reply.
Thank You! -
Why is it mostly only hatchbacks have rear windscreen wipers?
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Is it because normal cars have a trunk space to block out the exhaust smoke and dust from the road?Originally posted by ditzy:Why is it mostly only hatchbacks have rear windscreen wipers?
Why are automatic cars more expensive than manual? -
Because automatic gear boxes are more advanced, and have more clutches to replace.Originally posted by crispylips:Is it because normal cars have a trunk space to block out the exhaust smoke and dust from the road?
Why are automatic cars more expensive than manual? -
I thin that automatic gearboxes are pieces of precision engineering and cost more to produce and also there is a torque converter.
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auto gearbox where got clutch?Originally posted by ditzy:Because automatic gear boxes are more advanced, and have more clutches to replace. -
What are spark plugs for?
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depending on what type of auto gear boxOriginally posted by Tayysj:auto gearbox where got clutch?
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to ignite ur fuel/air mixtureOriginally posted by Herzog_Zwei:What are spark plugs for? -
http://www.familycar.com/Transmission.htmOriginally posted by Tayysj:auto gearbox where got clutch? -
I thought they call them igniters...Darn, still not used to the terminlogy.Originally posted by n0x:to ignite ur fuel/air mixture -
they may be called different things elsewhere...we say spark plugs in the USA.Originally posted by Herzog_Zwei:I thought they call them igniters...Darn, still not used to the terminlogy. -
Clutches don't just refer to the damn pedals your feet steps on.Originally posted by Tayysj:auto gearbox where got clutch? -
manual gearbox got clutch, and in auto gearbox, the equivalent is torque converter.Originally posted by ditzy:Clutches don't just refer to the damn pedals your feet steps on.
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i am expert in herzog Zwei,
heard that it is the ancestor to RTS genre. lolOriginally posted by Herzog_Zwei:I thought they call them igniters...Darn, still not used to the terminlogy. -
Hi everybody ! I got two Qns to ask.
Firstly here is the list of type of engine configaration and the advantages and the disavantages. Can the expert and more information in there please ?
In line engine
Adv-
smooth
easy to service
Div-
high nose increase areodynamic drag
V engine
Adv-
?
Div-
?
Box engine
Adv-
lower centre of gravity
low nose good for aerodynamic
Div-
hard to service
expansive to make
Wankel Rotory engine
Adv-
light , smooth , compact
Div-
high exhaust emissions due to insufficient control of airflow
high heat lost
Secondly , since Rearwheel (FR) drive car is easier to steer why is it Frontwheel (FF) Drive car still widely use. Is it due to the cost and the complexity of the design or ease of car design.
Thanks guys !!!!
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what do u mean by thatOriginally posted by archie84:Secondly , since Rearwheel (FR) drive car is easier to steer why is it Frontwheel (FF) Drive car still widely use. Is it due to the cost and the complexity of the design or ease of car design.
FR cars have better weight distribution than FF cars and hence better handling.... and frm a launch start a FR will have the advantage over FF cos of the "squating stance" pushing down the rear wheels and thus more traction to the rear driven wheels.... but since we are juz commuting everyday, the diff is negligible...
and hence makers adopt a "why not" attitude and extensively use the FF layout even with higher end makes like audi saab volvo and vw...
reasons being lower manufacturing costs and doing away with propeller shaft and rear differential allows more rear space and bigger boot... and with the engine mounted tranversely in a FF the front passengers get more leg room...
of cos there are makers that swear by the FRl ayout like mercedes( excluding A class) bmw and lexus... -
You means less wasted energy due to distance from engine to traction wheels?Originally posted by n0x:what do u mean by that
FR cars have better weight distribution than FF cars and hence better handling.... and frm a launch start a FR will have the advantage over FF cos of the "squating stance" pushing down the rear wheels and thus more traction to the rear driven wheels.... but since we are juz commuting everyday, the diff is negligible...
and hence makers adopt a "why not" attitude and extensively use the FF layout even with higher end makes like audi saab volvo and vw...
reasons being lower manufacturing costs and doing away with propeller shaft and rear differential allows more rear space and bigger boot... and with the engine mounted tranversely in a FF the front passengers get more leg room...
of cos there are makers that swear by the FRl ayout like mercedes( excluding A class) bmw and lexus... -
erm no...Originally posted by Herzog_Zwei:You means less wasted energy due to distance from engine to traction wheels?
go and visualise how a car will look like if it were to launch at 6k rpm... and u will understand
a car will "squat" meaning the front will tip upwards and the rear will "sit down" -
accelerating force forward, action = reaction hence weight goes to the rear, rear end lower than front end.Originally posted by n0x:erm no...
go and visualise how a car will look like if it were to launch at 6k rpm... and u will understand
a car will "squat" meaning the front will tip upwards and the rear will "sit down"
since generally more downforce on tyre (in this case weight) = more traction, FR cars get advantage. -
Firstly here is the list of type of engine configarations and the advantages and the disavantages. Can the expert add more information in there please ?
In line engine
Adv - smooth, easy to service
Dis- high nose increase aerodynamic drag
V engine
Adv - Shorter crankshaft increases stiffness and strength, shortens length of engine block, lower centre of gravity than in-line
Dis - Not as simple to manufacture and access for servicing
Box engine
Adv - lower centre of gravity, low nose good for aerodynamics
Dis - hard to service, expansive to make, difficult to lubricate properly
Wankel Rotory engine
Adv - light , smooth , compact, high pwer-to-size ratio
Dis - high exhaust emissions due to insufficient control of airflow, high heat losses
Secondly , since Rearwheel (FR) drive car is easier to steer why is it Frontwheel (FF) Drive car still widely use. Is it due to the cost and the complexity of the design or ease of car design. It's the more space-efficient design for family cars. -
I thought torque convertor is to release the energy created by the turning engine so as to prevent the car from stalling?Originally posted by sir_boris:manual gearbox got clutch, and in auto gearbox, the equivalent is torque converter. -
well JDM cars have rear windscreen wipers too, it's a JIS requirement.Originally posted by ditzy:Why is it mostly only hatchbacks have rear windscreen wipers? -
When are cars towed from the front and when are they towed from the back?
Depends on the engine issit?
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Towed from front - front wheel drive. The rear wheels can roll without causing damage to the drivetrain. For 4WD cars, the wheels of either axle are suspended and the other end is towed.Originally posted by MooKu:When are cars towed from the front and when are they towed from the back? Depends on the engine issit?