Questions tagged [automotive-design]

The way that the manufacturer of any given vehicle determined to engineer it.

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5 votes
1 answer
5k views

What is a stress riser?

What is a stress riser and why is it important to avoid them during engine construction or rebuild?
30 votes
3 answers
392k views

what is difference between DOHC and SOHC?

I want to know the SOHC and DOHC configurations. On what factors an engine manufacturer decides to go with SOHC or with DOHC, what should I choose? DOHC or SOHC?
9 votes
1 answer
1k views

What is Lobe Separation Angle (LSA)?

What is Lobe Separation Angle (LSA) and how is it used in camshaft design? How is it measured? What difference does a long or short LSA make?
10 votes
3 answers
3k views

How did luxury cars provide smoother rides without active suspensions?

It seems all luxury cars have active suspensions now, so it's not a fair comparison to "non-active" cars. But I was recently driving a mid-2000 Mercedes E-class over the same roads I normally travel ...
  • 1,189
8 votes
1 answer
2k views

What is a sprag unit and what does it do?

I know a sprag unit is used in the transmission. What is it and how does it work? Is it used anywhere else or is it strictly a thing used in transmissions? Are there different kinds of sprags?
7 votes
2 answers
30k views

Oil Cooled vs Water Cooled

These both are cooling mechanisms. One uses oil to cool whereas other uses some kind of water-based coolant. What are advantages and disadvantages of both in both technical and ownership point of view?...
6 votes
2 answers
3k views

Why do vehicles handle better with heavy loads? [closed]

Inspired by comments here: I'm not the only one who has experienced an improvement in ride and road-feel with a heavily-laden vehicle. I'm recalling a long drive I made a decade ago in my otherwise ...
  • 1,189
4 votes
2 answers
4k views

Does Mazda's Skyactiv-G engine avoid EGR altogether?

It looks like Mazda sees high compression-ratio engines as the way forward to boost fuel economy and specific power on their midsize gasoline engine lineup (13:1 is an impressive achievement). ...
  • 39k
2 votes
1 answer
109 views

Designing IC engine [closed]

I am trying to design a theoretical internal combustion (IC) engine. The ultimate goal is to achieve 3000 hp with this engine, for which I know I will need low bore x stroke ratio, high compression, ...
1 vote
0 answers
286 views

Why is rain not a consideration for sedans' rear windows?

I recently bought a new car and was very surprised to find that it has no rear windscreen wiper. On further investigation, I discovered that in general, car manufacturers only include rear wipers on ...
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