Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.
If we do not hit our goal we will be forced to close the site.

Current status: https://keepboardsalive.com/

Annual subs are best for most impact. If you are still undecided on going Ad Free - you can also donate using the Paypal Donate option. All contribution helps. Thank you.

https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.

Car engine firing cycle.

bigtimecharlie · 2024-06-30 11:26:06

Posting here as some of you all may be knowledgeable on my question. In an inline 4 cylinder engine (i4), am I correct that at any one time, each of the 4 cylinders is doing one of the 4 stages of running (intake, compression, power and exhaust)? If so, what's going on in a i6, are 2 cylinders idle for a portion of the…

30-06-2024 12:26PM

#1

bigtimecharlie

Registered Users, Registered Users 2 Posts: 2,107 ✭✭✭

Join Date: November 2003

Posts: 1970

Posting here as some of you all may be knowledgeable on my question.
In an inline 4 cylinder engine (i4), am I correct that at any one time, each of the 4 cylinders is doing one of the 4 stages of running (intake, compression, power and exhaust)?
If so, what's going on in a i6, are 2 cylinders idle for a portion of the rotation?

1

Comments

#2 24-07-2024 09:29PM

Silent Shrill

Registered Users, Registered Users 2 Posts: 159 ✭✭

Join Date: September 2010

Posts: 128

They are all doing something, they simply have 2 more pistons, hence greater power, (usually).

0
#3 29-07-2024 11:23PM

whizbang

Registered Users, Registered Users 2 Posts: 2,051 ✭✭✭

Join Date: September 2009

Posts: 1994

A 6 Cylinder will have the pistons offset by 120 degrees, sort of arranged as 2 x 3 to get 2 x 360 cycles, whereas a 4 cyl wil have 90deg. So 3 bangs per 2 revolutions gives a smoother power and better balance than 2 bangs per 2 revs.

0