Isao Honda
Assistant Manager, Technical Development Section,
The Hanshin Diesel Works, Ltd.
Highly reliable Low-speed, 4 stroke Diesel engine
1. Foreward
High reliability and ease in operation and maintenance as well as low fuel consumption
and high output are required to ship propulsion engines due to short of ship crew in Japan
recently.
It is general in worldwide view, low-speed 2-stroke engines are used for large ships,
and high or medium speed, 4-stroke engines are used for middle and small sized ships.
However, in the majority of middle sized coastal ships in Japan, peculiar low-speed,
4-stroke engines are employed as lain engines. It is because that low-speed 4-stroke
engines make a feature of high reliability and ease in operation and maintenance and low
running cost.
LHL series engines were completed by Hanshin Diesel Works, Ltd. with its long
experience and actual results in producing marine engines are pursuing high reliability,
manpower-saving and economy of ship owners.
Hanshin Diesel Works, Ltd. has also developed recently anti-vibration mounting device
and reduced NOx emission engines.
LH4IL(A) and LH46L(A) as big models of LHL series engines introduced
hereinafter.
2.Particular of engine
Main particulars of LH41L(A) and LH46L(A) are shown in Table 1.
| Engine Model |
LH41L |
LH41LA |
LH46 |
LH46LA |
| Number of cyinders |
| Cylinder bore (mm) |
| Stroke
(mm) |
| output
(PS) |
| engine speed
(rpm) |
| Brake mean effective pressure(kgf/cm2) |
| Mean piston speed (m/s) |
| Cylinder maximum pressure(kgf/cm2) |
| Specific fuel consumption(g/PSh) |
| Specific lubricating oil consumption(g/PSh) |
| System oil |
| Cylinder oil |
| Engine weight (t) |
|
| 6 |
| 410 |
| 800 |
| 3300 |
| 225 |
| 20.83 |
| 6.00 |
| 140 |
| 132 |
| |
| 0.8 |
| 0.5 |
| 56 |
|
| 6 |
| 410 |
| 800 |
| 3500 |
| 235 |
| 21.15 |
| 6.27 |
| 140 |
| 132 |
|
| 0.8 |
| 0.5 |
| 56 |
|
| 6 |
| 460 |
| 880 |
| 4000 |
| 200 |
| 20.51 |
| 5.87 |
| 140 |
| 130 |
|
| 0.8 |
| 0.5 |
| 78 |
|
| 6 |
| 460 |
| 880 |
| 4500 |
| 220 |
| 20.98 |
| 6.45 |
| 140 |
| 130 |
|
| 0.8 |
| 0.5 |
| 78 |
|
Table 1 MAIN PARTICULARS OF LH41L(A) AND LH46L(A)
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