Prime-mover dynamo plants – Traction
Patent
1989-10-11
1991-10-01
Pellinen, A. D.
Prime-mover dynamo plants
Traction
180 652, B60L 720
Patent
active
050536320
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL BACKGROUND
This invention relates to an electric braking and auxiliary engine mechanism which performs braking and auxiliary acceleration for motor vehicles and more particularly, to an electric braking and auxiliary engine mechanism which includes a rotary machine directly coupled to the crank shaft of an internal combustion engine which drives the axle of the vehicle.
PRIOR ART
The progress of internal combustion engines, especially improvements in supercharging technology, along with development of thermally resistant materials, have successfully realized an internal combustion engine of small stroke volume with high output power. As the capacity of an internal combustion engine becomes smaller, however, the effect of an exhaust retarder or an engine brake is reduced in correspondence with to its stroke volume, necessitating the concurrent use of a retarder. More specifically, an auxiliary brake system is required in addition to the friction brake equipment mounted on wheels, to offset acceleration caused when motor vehicles go downhill or to reduce the speed to a predetermined level in the initial stage of braking at high speed. There has been provided a retarder, of an eddy current system type of a power generator with an inductor-type structure, directly coupled with the rotor shaft of the internal combustion engine. Although the retarder of an eddy current system is sturdy enough to withstand the outside force caused by the irregular vibration of wheels due to rough roads, the system cannot regenerate useful energy as it converts all of the mechanical energy to be consumed for braking into thermal energy and dissipates it into the atmosphere. This goes against the recent trend of improving fuel consumption, and a device with a large thermal capacity mounted on a motor vehicle for thermal radiation inconveniently increases the size of the system.
It has been proved that the direct coupling of an inductor-type alternator with the crank shaft of an internal combustion engine is effective as an auxiliary retarder. It has also been proved that in this system, mechanical energy consumed for braking can be converted into electric energy, and that electric energy is recovered in a rechargeable battery which may be used for a starter or other facilities mounted on the vehicle. A generator of this type is, however, defective in that the gap between the stator and the rotor of the generator must be as small as possible, in order to prevent magnetic leakage which reduces efficiency, and that the manufacturing precision of the rotor and the stator must be improved to an extensive degree. This will require considerable working expense in mass production.
The machine would be able to provide extra operational modes for drivers to improve driving performance, when the driving means for start/acceleration and climbing/running support are used in addition to the main driving means.
Inventors have conducted experiments using a squirrel-cage polyphase induction machine as above, and have found that a large braking force is obtained, that electric energy, generated by braking, can be recovered to a large extent in a rechargeable battery, and that the rechargeable battery can be used effectively as the electric power source for auxiliary power.
Inventors have carried out various experiments in order to grasp the relation between the revolving speed of the rotor and the braking torque given to the crank shaft. They have noticed a phenomenon in which no braking torque is generated when the revolving speed of the rotor is at a certain high value, and when low resistance value of a shunt resistor is connected to the electric output of the machine in order to attain large breaking torque They have carried out their experiments by varying the resistance value of the resistor and the revolving speed, in order to find out the reason. They have learned that braking torque is reduced rapidly when the output is terminated by a resistor of small value, and when the revolving speed of the shaft is low, and that as the r
REFERENCES:
patent: 4305254 (1981-12-01), Kawakatsu et al.
patent: 4313080 (1982-01-01), Park
patent: 4533011 (1985-08-01), Heidemeyer et al.
patent: 4562894 (1986-01-01), Yang
patent: 4699097 (1987-10-01), Tanaka et al.
patent: 4766967 (1988-08-01), Slicker et al.
Iketani Sadayoshi
Kawata Kouzou
Koike Tetsuo
Obata Atsuomi
Sasaki Kohji
Duncanson Jr. W. E.
Hino Jidosha Kogyo Kabushiki Kaisha
Kabushiki Kaisha Toshiba
Pellinen A. D.
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