Gear type automated torque converter

Details Gear type automated torque converter Gear type automated torque converter

1999-07-27

2001-04-10

Marmor, Charles A. (Department: 3681)

Planetary gear transmission systems or components

Differential planetary gearing

Differential or nondifferential planetary combined with...

C475S254000

Reexamination Certificate

active

06213908

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a gear type automated torque converter which provides a continuously variable minimum torque required in a transmission system subject to changing of the loading.
Regular gear shifting systems are complicated, and require a precision torque converter. When changing the gear shifting position, a vibration will be generated. Furthermore, the timing of the gear shifting must be decided through a precise and sensitive detection and calculation means. A friction type speed changing system achieves high performance, however it can only be used for small loading. There are also known differential gear type speed changing systems, however these systems are for simple use only. The conventional type of speed changing mechanism includes non-stepped speed changing systems and stepped speed changing systems, as outlined hereinafter.
a. In a stepped speed changing system, the system operation, in which the required torsion and loading is provided by means of several speed ratios, is divided into several parts. Because the speed ratio between each two parts of the system operation is not changeable, change of torsion during the system operation is controlled by the engine. To accommodate this, the structure of the engine becomes very complicated. The decision of the time where the speed of revolution is to be changed must be made through a precise and sensitive detection and calculation device. Such a precise and sensitive detection and calculation device is expensive.
b. Most conventional non-stepped speed changing systems are of a friction design. There are also known magnetic force type non-stepped speed changing systems, as well. However, using frictional force or magnetic force can only produce a limited torque. Therefore, these non-stepped speed changing systems can only be used in small scale transmission systems. These non-stepped speed changing systems achieve high performance, however they need detecting elements to determine rotational speed. These detecting elements complicate the structure of the system.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a gear type automated torque converter which automatically determines the minimum torque required in a transmission system for the desired speed when the transmission system bears a variable resistance. It is another object of the present invention to provide a gear type automated torque converter which uses a highly stable gear mechanism to achieve automatic changing of output torque without the assistance of detecting elements. It is still another object of the present invention to provide a gear type automated torque converter which saves power. The gear type automated torque converter maintains a fixed slip ratio between the speed of the power input shaft and the output speed of the feedback unit. This feature fits the converter's performance curve, i.e., high performance is achieved under a fixed slip ratio. It is still another object of the present invention to provide a simple and effective rule and calculation method which determines the characteristics of the gear mechanism and the number of feedback levels, enabling a balance point to be obtained between system complicacy and the amount of feedback power required. It is still another object of the present invention to provide a gear type automated torque converter which simplifies the design and fabrication of the power source (engine). The power output characteristic of the gear type automated torque converter is independent of the characteristic of the engine. Either a complicated or simple engine can drive the gear type automated torque converter to provide the desired output of the same horse power. It is still another object of the present invention to provide a gear transmission mechanism which achieves the same multiplication and power gain as equivalent electronic circuit means, enabling mechanical mechanism designers to design a variety of products having a variable output.


REFERENCES:
patent: 2480032 (1949-08-01), Kochis
patent: 3318172 (1967-05-01), Cummins
patent: 4077278 (1978-03-01), Combastet
patent: 4235125 (1980-11-01), Perlin
patent: 4598610 (1986-07-01), Kim
patent: 4854190 (1989-08-01), Won
patent: 5456640 (1995-10-01), Peterson

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