Internal-combustion engines – Charge forming device – Supercharger
Patent
1998-03-31
2000-05-09
Koczo, Michael
Internal-combustion engines
Charge forming device
Supercharger
192 20, 192225, 123561, F02B 3912
Patent
active
060589167
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an apparatus for controlling a mechanical supercharger for a diesel engine, and particularly to an apparatus and a method for operating the mechanical supercharger when the fuel injection rate of the diesel engine has reached the range from a predetermined value to the maximum injection rate.
BACKGROUND ART
Conventionally, in an engine for a vehicle mainly traveling with wheels, such as a car, a truck, a wheeled loader, a wheel crane, a supercharger has been used to reduce the engine size while increasing the output of the engine, securing good acceleration. As for the supercharger, there is a mechanical supercharging method which uses part of the engine output, or the power of other machinery, and there is a turbocharger supercharging method which uses exhaust gas. For this reason, as the first background with the mechanical supercharging method, a supercharger 40 is mechanically and directly connected to and driven by an engine 41 through gears 42 and 43, or through a belt or the like, as FIG. 14 illustrates. In the directly connected and driving type where air is supplied as illustrated in FIG. 15, in an area A where the engine speed is lower with a higher load, the amount of air which is supplied to the engine is insufficient. In an area B where the engine speed is higher with a lower load, the amount of the air supply is excessive, increasing the driving loss of the supercharger 40.
There has been a differential driving method proposed for driving the supercharger 40 as shown in FIG. 16. In the differential driving method (I) in FIG. 16, a planetary carrier 43 is fixed to and connected to an output shaft 41a of the engine 41, and usually, three of planetary gears 44 are rotatably attached to the planetary carrier 43 equidistantly from one another. A sun gear 45 is meshed with the inner side of the three planetary gears 44, and a ring gear 46 is meshed with the outer side of the three planetary gears 44. At the inside of the sun gear 45, the output shaft 41a of the engine 41 is rotatably disposed. A gear 47 is provided at one end of the sun gear 45, and a driving gear 48 for the mechanical supercharger 40 is meshed with the gear 47. A shaft of a power transmission system 50 for a vehicle is connected to the ring gear 46, and the mechanical supercharger 40 is variably rotated, depending on the load of the power transmission system.
A differential driving method (II) in FIG. 17, for driving a supercharger by a differential driving method similar to the above, has a configuration substantially similar to the above. In the differential driving method (II), the ring gear 46 is provided with a brake 46a which utilizes electricity, dry condition, oil pressure, or the like. The rotational force of the mechanical supercharger 40 is controlled based on the difference in strength of the drag resistance caused by the brake 46a.
Next, as a second background, there is construction machinery which requires higher output at lower and medium engine speed, or there is construction machinery which requires higher output at higher engine speed, depending on the kind of machine used. For example, there is machinery, such as hydraulic shovel or the like, which needs higher output in an area Qa with the engine rotating at higher speed, as shown in FIG. 18. There is machinery, such as a bulldozer, a damp truck, a wheeled loader, a motor grader, or the like, which requires higher output at lower and moderate engine speed as shown in FIG. 19.
When classifying the uses of each machine's engine according to each load, the engine speed, and the frequencies of use, the construction machinery's engine described above is more frequently used in areas Fa and Fb of FIG. 20. In the vehicles with tires, such as a car, a truck for transporting cargo, a bus, a dump truck, a forklift, and the like, and in a fishing boat, a pleasure boat, and in a ship, the engines are more frequently used in areas Fb and Fe. In a word, in construction machinery, the engine is more frequently used under a
REFERENCES:
patent: 2588462 (1952-03-01), Baker et al.
patent: 2660991 (1953-12-01), Wasielewski
patent: 2830472 (1958-04-01), Brass
patent: 5256109 (1993-10-01), Winkelmann et al.
patent: 5875766 (1999-03-01), Ozawa
Koczo Michael
Komatsu Ltd.
LandOfFree
Apparatus for controlling a mechanical supercharger for a diesel does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for controlling a mechanical supercharger for a diesel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for controlling a mechanical supercharger for a diesel will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1054871