×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Low compression pressure in diesel engines

Low compression pressure in diesel engines

Low compression pressure in diesel engines

(OP)
In 3200HP diesel engine we have a particular thermodynamic behavior in a particular cylinder, monitored buy a pressure sensor that relates pressure with crankshaft position and comparing with other cylinders: there are low compression pressure, low peak pressure and a big delay in peak angle. If there are no leaks in the combustion chamber (by rings or valves), what would be the cause of a low compression pressure. We think that maybe there is a difference in volume between chambers (short connnecting rod, etc).

Thanks,

RE: Low compression pressure in diesel engines

What sort of Injectors are on the engine? The Hydraulically actuated and electronically controlled injector types are the most sensitive and thus if one of the twelve( i assume a 12 Cylinder Engine)is not firing at optimal capacity, it can lead to loss of compression in the particular chamber.

RE: Low compression pressure in diesel engines

In a spark ignited engine, the low/late peak would probably be attributed to late firing.  I assume this would be true with diesels except it would be injectors instead of spart plugs.

What does low compression do to a diesel?  Slower ignition? Maybe a cracked liner? perhaps I am a bit late to reply to this thread.

RE: Low compression pressure in diesel engines

(OP)
Thank you for your answers guys. You canf find complete information in another forum submitted in Engine & fuel engineering section.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close