Home
What's new
Latest activity
Authors
Store
Latest reviews
Search products
Forums
New posts
Search forums
What's new
New posts
New listings
New products
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
Cart
Cart
Loading…
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Change style
Contact us
Close Menu
Forums
SVTPerformance's Chain of Restaurants
Road Side Pub
How does Cylinder Deactivation actually save fuel?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Voltwings" data-source="post: 15764711" data-attributes="member: 155561"><p>I am aware of how it "works," but my question is how does it actually save fuel? </p><p></p><p>A vehicle needs to produce a certain power level to net 0 rotational losses, wind resistance, friction, etc and maintain a constant speed, lets call it 20 hp at 65 mph. 20 hp should have a definite brake specific fuel consumption, and the number of cylinders making "20 hp" should be arbitrary? if it's 1 cylinder making 20 horsepower or 12, 20 hp is 20 hp, and 20 hp worth of fuel is 20 hp worth of fuel? If half the cylinders shut off and we were suddenly using less fuel (and presumably making less power as a result of less fuel), we'd be at a net loss and the vehicle would begin decelerating? </p><p></p><p>Every article i have found on the topic seems to have been written for, or by, a 5 year old and is more concerned on explaining the deactivation of cylinders rather than fuel savings. </p><p></p><p>I figure there is probably something very simple i am not taking into consideration, but right now it just doesn't make sense to me.</p></blockquote><p></p>
[QUOTE="Voltwings, post: 15764711, member: 155561"] I am aware of how it "works," but my question is how does it actually save fuel? A vehicle needs to produce a certain power level to net 0 rotational losses, wind resistance, friction, etc and maintain a constant speed, lets call it 20 hp at 65 mph. 20 hp should have a definite brake specific fuel consumption, and the number of cylinders making "20 hp" should be arbitrary? if it's 1 cylinder making 20 horsepower or 12, 20 hp is 20 hp, and 20 hp worth of fuel is 20 hp worth of fuel? If half the cylinders shut off and we were suddenly using less fuel (and presumably making less power as a result of less fuel), we'd be at a net loss and the vehicle would begin decelerating? Every article i have found on the topic seems to have been written for, or by, a 5 year old and is more concerned on explaining the deactivation of cylinders rather than fuel savings. I figure there is probably something very simple i am not taking into consideration, but right now it just doesn't make sense to me. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
SVTPerformance's Chain of Restaurants
Road Side Pub
How does Cylinder Deactivation actually save fuel?
Top