Why Do Marine Diesel Engines Have Different Firing Orders?

  • Automotive
  • Thread starter babakN
  • Start date
  • #1
babakN
1
0
TL;DR Summary
Firing order, from CCW and CW
This is my question, the reason for the difference in the firing order What is for diesel engines? Example CCW 1,5,3,6,4,2 CW is a 1,42,6,3,5
 
Engineering news on Phys.org
  • #2
babakN said:
TL;DR Summary: Firing order, from CCW and CW

This is my question, the reason for the difference in the firing order What is for diesel engines? Example CCW 1,5,3,6,4,2 CW is a 1,42,6,3,5
Balance? A little more information would be useful.
 
  • #3
Two stroke, or four stroke?
Inline 6, or V6 ?
Numbered from the front or the rear?

https://en.wikipedia.org/wiki/Firing_order#Common_firing_orders
"Straight-six engines typically use a firing order of 1-5-3-6-2-4, which results in perfect primary and secondary balance. However, a firing order of 1-2-4-6-5-3 is common on medium-speed marine engines."

Where a matched pair of counter rotating engines is used, the cranks may be the same, but the camshafts, fuel injection pump drive, and the oil lubrication pump will be different. The optimum bearing lubrication points will also be different.
 
  • Informative
  • Like
Likes Lnewqban, DaveE and berkeman

Related to Why Do Marine Diesel Engines Have Different Firing Orders?

What is the reason for the difference in the firing order for Marine diesel engines?

The firing order in marine diesel engines is determined by various factors including engine balance, smooth operation, and minimizing vibrations. The specific application and design of the engine also play a significant role in determining the optimal firing order.

How does the firing order affect engine balance in marine diesel engines?

The firing order affects engine balance by influencing the distribution of forces and moments within the engine. A well-chosen firing order helps to balance the reciprocating masses and reduce torsional vibrations, leading to smoother engine operation and reduced wear on components.

Why is minimizing vibrations important in marine diesel engines?

Minimizing vibrations is crucial in marine diesel engines to ensure the longevity of the engine and the comfort of the vessel. Excessive vibrations can lead to mechanical failures, increased maintenance costs, and discomfort for crew and passengers.

Are there specific firing orders commonly used in marine diesel engines?

Yes, certain firing orders are more commonly used in marine diesel engines due to their proven effectiveness in balancing forces and minimizing vibrations. However, the specific firing order can vary depending on the engine configuration, such as inline, V-type, or opposed-piston designs.

Can the firing order be changed in an existing marine diesel engine?

Changing the firing order in an existing marine diesel engine is generally not feasible without significant modifications. The firing order is intricately linked to the engine's design, including the crankshaft and camshaft configurations, and altering it would require substantial engineering changes.

Similar threads

  • Mechanical Engineering
Replies
6
Views
1K
  • Mechanical Engineering
Replies
6
Views
1K
  • Mechanical Engineering
Replies
11
Views
20K
Replies
10
Views
2K
  • Mechanical Engineering
Replies
16
Views
2K
Replies
3
Views
2K
Replies
2
Views
1K
  • Mechanical Engineering
Replies
14
Views
2K
Replies
5
Views
3K
Replies
1
Views
1K
Back
Top