Main Data And Outputs; Maximum Continuous Output - Wartsila ?31DF Series Product Manual

Wärtsilä 31DF Product Guide
1.

Main Data and Outputs

The Wärtsilä 31DF is a 4-stroke, non-reversible, turbocharged and intercooled diesel engine
with direct fuel injection.
Cylinder bore ........................
Stroke ...................................
Number of valves .................
Cylinder configuration .........
V-angle .................................
Direction of rotation .............
Speed ...................................
Mean piston speed ...............
1.1

Maximum continuous output

Table 1-1
Cylinder
configuration
W 8V31DF
W 10V31DF
W 12V31DF
W 14V31DF
W 16V31DF
The mean effective pressure Pe can be calculated as follows:
where:
Pe =
D =
DBAE248994
Rating table for Wärtsilä 31DF
Main engines
750 rpm
[kW]
4400
5500
6600
7700
8800
mean effective pressure [bar]
P = output per cylinder [kW]
n = engine speed [r/min]
cylinder diameter [mm]
L = length of piston stroke [mm]
c = operating cycle (4)
310 mm
430 mm
2 inlet valves, 2 exhaust valves
8, 10, 12, 14 and 16
50°
Clockwise, counterclockwise
720, 750 rpm
10.32 - 10.75 m/s
720 rpm
Engine [kW] Generator [kVA]
4240
5300
6360
7420
8480
1. Main Data and Outputs
Generating sets
750 rpm
Engine [kW]
5090 4400
6360 5500
7630 6600
8900 7700
10180 8800
Generator [kVA]
5280
6600
7920
9240
10560
1-1