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1047 results about "Gear ratio" patented technology

The gear ratio of a gear train, also known as its speed ratio, is the ratio of the angular velocity of the input gear to the angular velocity of the output gear. The gear ratio can be calculated directly from the numbers of teeth on the gears in the gear train. The torque ratio of the gear train, also known as its mechanical advantage, is determined by the gear ratio. The speed ratio and mechanical advantage are defined so they yield the same number in an ideal linkage.

Contactless angular position sensor and method for sensing angular position of a rotatable shaft

A contactless rotary shaft position sensor provides for precision computation of shaft angle for a wide range of input shaft rotational angles. The sensor includes two annular two-pole magnets which are connected by a precision, motion-transmitting gear train. An optional second gear train between one of the magnets and the input shaft can provide additional angular rotation scaling to accurately measure either fractional or a large number of multiple turns of the input shaft. The gear ratios are selected such that one of the magnets does not rotate more than one revolution. Pairs of ratiometric Hall-effect or magnetoresistive sensors provide differential voltage signals which are used for sensing angular position of each magnet over a full 360 degrees of rotation. The single-turn magnet provides an absolute, coarse indication of input shaft rotation with a typical accuracy of 2%. The gear ratio between the magnets produces several turns of the second magnet for each turn of the single-turn magnet. Since the gear ratio between the magnets is fixed, the angle sensed for the multi-turn magnet can be predicted from the position of the single-turn magnet. This is compared to the multi-turn magnet's actual sensed rotation. The result is an improvement in accuracy directly proportional to the gear ratio between the magnets. Computation of the individual magnet rotation angles and the input shaft angle is performed using a microprocessor and appropriate signal conditioning circuits. Utilizing two magnets, input shaft rotation can be accurately measured to within 0.1% of maximum range.
Owner:BVR TECH

Automotive internal combustion engine control system

An automotive internal combustion engine control system transmits the output of a starting motor capable of operating as a generator to an internal combustion engine in starting the internal combustion engine, and transmits the output of the internal combustion engine to accessories while the internal combustion engine is in operation. The automotive internal combustion engine control system includes a transmission mechanism that transmits the output of the starting motor to the accessories while the internal combustion engine is stopped for a predetermined condition, transmits the rotation of the drive shaft of the starting motor to the crankshaft of the internal combustion engine at a high first gear ratio in starting the internal combustion engine, and transmits the rotation of the crankshaft of the internal combustion engine to the drive shaft of the starting motor at a low second gear ratio while the internal combustion engine is in operation to operate the starting motor as a generator. The transmission mechanism enables driving the accessories by the starting motor while the internal combustion engine is stopped, smoothly starting the internal combustion engine and efficient energy regeneration while the internal combustion engine is in operation.
Owner:HONDA MOTOR CO LTD
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