Drive system and automobile
First Claim
1. A drive system of driving a drive shaft, said drive system comprising:
- an internal combustion engine having a crankshaft as its output shaft;
a position holding module that is directly attached to the crankshaft of said internal combustion engine and applies either of an electromagnetic force and a mechanical force to hold the crankshaft at a preset rotational position; and
a stop control module that, in response to fulfillment of a predetermined stop condition, controls said internal combustion engine and said position holding module to stop said internal combustion engine while holding the crankshaft at the preset rotational position, wherein said stop control module turns the crankshaft to the preset rotational position after a stop of rotation of the crankshaft.
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Accused Products
Abstract
A counterweight 40 attached to a crankshaft 38 has a projection 42, which is aligned with and faces an electromagnet 44 attached to a crank casing 46 when the crankshaft 38 is at a preset rotational position of ensuring good startability of an engine 22. Engine stop control starts a power supply to the electromagnet 44 to attract the projection 42 of the counterweight 40 at a timing when the projection 42 of the counterweight 40 is practically aligned with the electromagnet 44, on the condition that the revolution speed of the crankshaft 38 is lowered to or below a preset level immediately before a full stop of rotation of the crankshaft 38. This engine stop control stops the rotation of the crankshaft 38 and desirably holds the crankshaft 38 at the preset rotational position of ensuring good startability of the engine 22.
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Citations
23 Claims
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1. A drive system of driving a drive shaft, said drive system comprising:
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an internal combustion engine having a crankshaft as its output shaft;
a position holding module that is directly attached to the crankshaft of said internal combustion engine and applies either of an electromagnetic force and a mechanical force to hold the crankshaft at a preset rotational position; and
a stop control module that, in response to fulfillment of a predetermined stop condition, controls said internal combustion engine and said position holding module to stop said internal combustion engine while holding the crankshaft at the preset rotational position, wherein said stop control module turns the crankshaft to the preset rotational position after a stop of rotation of the crankshaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 19)
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15. A drive system of driving a drive shaft, said drive system comprising:
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an internal combustion engine having a crankshaft as its output shaft;
a magnetic field generation module that is arranged to generate a magnetic field of a preset magnetic polarity at a predetermined position of the crankshaft of said internal combustion engine toward an outer side of the crankshaft; and
a position holding module that utilizes a magnetic force produced by an interaction with the magnetic field generated by said magnetic field generation module to hold the crankshaft of said internal combustion engine at a preset rotational position. - View Dependent Claims (16, 17, 18)
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20. An automobile, comprising:
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an internal combustion engine having a crankshaft as its output shaft;
a position holding module that is directly attached to the crankshaft of said internal combustion engine and applies either of an electromagnetic force and a mechanical force to hold the crankshaft at a preset rotational position;
a stop control module that, in response to fulfillment of a predetermined auto stop condition, controls said internal combustion engine and said position holding module to stop said internal combustion engine while holding the crankshaft at the preset rotational position; and
an auto start module that, in response to fulfillment of a predetermined auto start condition, releases the hold of the crankshaft at the preset rotational position by said position holding module and starts said internal combustion engine, wherein said automobile further comprising;
an electric braking module that is capable of braking the crankshaft or the output shaft of said internal combustion engine through input and output of electric power; and
an accumulator module that is capable of transmitting electric power to and from said electric braking module, wherein said position holding module functions as a mechanical braking module to mechanically brake the output shaft of said internal combustion engine, and said stop control module controls said internal combustion engine to stop operation of said internal combustion engine, while controlling said electric braking module and said mechanical braking module to stop rotation of said internal combustion engine.
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21. An automobile, comprising:
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an internal combustion engine having a crankshaft as its output shaft;
a magnetic field generation module that is arranged to generate a magnetic field of a preset magnetic polarity at a predetermined position of the crankshaft of said internal combustion engine toward an outer side of the crankshaft;
a position holding module that utilizes a magnetic force produced by an interaction with the magnetic field generated by said magnetic field generation module to hold the crankshaft of said internal combustion engine at a preset rotational position;
a stop control module that, in response to fulfillment of a predetermined auto stop condition, controls said position holding module to hold the crankshaft at the preset rotational position; and
an auto start module that, in response to fulfillment of a predetermined auto start condition, releases the hold of the crankshaft at the preset rotational position by said position holding module and starts said internal combustion engine.
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22. A control method of a drive system that drives a drive shaft, said drive system comprising:
- an internal combustion engine having a crankshaft as its output shaft; and
a position holding module that is directly attached to the crankshaft of said internal combustion engine and applies either of an electromagnetic force and a mechanical force to hold the crankshaft at a preset rotational position,in response to fulfillment of a predetermined stop condition, said control method controlling said internal combustion engine and said position holding module to stop said internal combustion engine while holding the crankshaft at the preset rotational position, wherein said drive system further comprises;
an electric braking module that is capable of braking the crankshaft or the output shaft of said internal combustion engine through input and output of electric power; and
an accumulator module that is capable of transmitting electric power to and from said electric braking module, andsaid position holding module functions as a mechanical braking module to mechanically brake the output shaft of said internal combustion engine, in response to fulfillment of the predetermined stop condition, said control method controlling said internal combustion engine to stop operation of said internal combustion engine, while controlling said electric braking module and said mechanical braking module to stop rotation of said internal combustion engine within an allowable range of a charge-discharge limit of said accumulator module.
- an internal combustion engine having a crankshaft as its output shaft; and
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23. A control method of a drive system that drives a drive shaft, said drive system comprising:
- an internal combustion engine having a crankshaft as its output shaft;
a magnetic field generation module that is arranged to generate a magnetic field of a preset magnetic polarity at a predetermined position of the crankshaft of said internal combustion engine toward an outer side of the crankshaft; and
a position holding module that utilizes a magnetic force produced by an interaction with the magnetic field generated by said magnetic field generation module to hold the crankshaft of said internal combustion engine at a preset rotational position,in response to fulfillment of a predetermined stop condition, said control method controlling said position holding module to hold the crankshaft at the preset rotational position.
- an internal combustion engine having a crankshaft as its output shaft;
Specification