Electricity: motive power systems – Automatic and/or with time-delay means – With nonautomatic control means
Reexamination Certificate
1999-12-28
2001-04-17
Masih, Karen (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
With nonautomatic control means
C318S009000, C318S015000, C318S445000, C318S478000
Reexamination Certificate
active
06218799
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an engine driving motor control apparatus, and more particularly to a control apparatus for an engine driving motor which performs start-up of an engine efficiently in a short time.
2. Description of the Related Art
A control apparatus for an engine driving motor is conventionally known and disclosed, for example in Japanese Patent Laid-Open No. Hei 5-149221. The control apparatus for an engine driving motor uses a starter motor to stop a crankshaft at a position at which a comparatively low load is applied to the crankshaft when the engine stops. The control apparatus is thus directed to obtaining high speed rotation of the crankshaft with comparatively low power supply to the starter motor upon next start-up of the engine.
The control apparatus disclosed in the prior art document mentioned above, however, does not take a dynamic action upon the direction of rotation of the crankshaft when the engine is stopped into consideration.
Further, while the control apparatus used a starter motor as means for operating the crankshaft, a starter motor which is used popularly is energized through a switch which is operated by a driver of the vehicle. Therefore, where the control apparatus is applied to an engine of the type just mentioned, it cannot employ an apparatus which operates the starter motor when the engine stops.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a control apparatus for an engine driving motor having a function of driving a crankshaft of an engine and another function of generating electric power from power from the crankshaft by which an engine can be started up efficiently in a short time.
The object of the present invention described above is achieved by a control apparatus for an engine driving motor which has a function of driving a crankshaft of an engine and another function of generating electric power with power from the crankshaft, comprising a crankshaft position sensor for detecting a rotational position of the crankshaft when the engine stops, and control means for energizing, when the engine stops, the engine driving motor to rotate the crankshaft from the rotational position of the crankshaft detected when the engine stops to a dynamically neutral position of the crankshaft.
The object of the present invention described above is achieved also by a control apparatus for an engine driving motor which has a function of driving a crankshaft of an engine and another function of generating electric power with power from the crankshaft, comprising a camshaft position sensor for outputting a signal at a particular rotational position of a camshaft operatively connected to the crankshaft, and control means for energizing, when the engine stops, the engine driving motor to rotate the crankshaft to a particular position which corresponds to a position of the camshaft immediately prior to the particular rotational position of the camshaft.
The object of the present invention described above is achieved further by a control apparatus for an engine driving motor which has a function of driving a crankshaft of an engine and another function of generating electric power with power from the crankshaft, comprising a crankshaft position sensor for detecting a rotational position of the crankshaft when the engine stops, a camshaft position sensor for outputting a signal at a particular rotational position of a camshaft operatively connected to the crankshaft, determination means for determining whether or not power supply to the engine driving motor should be stopped, and control means for energizing, when the engine stops and the determination means determines that the power supply to the engine driving motor should be stopped, the engine driving motor to rotate the crankshaft from the rotational position of the crankshaft detected when the engine stops to a dynamically neutral position of the crankshaft when the engine stops, but energizing, when the engine stops and then the determination means determines that the power supply to the engine driving motor should not be stopped, the engine driving motor to rotate the crankshaft to a particular position which corresponds to a position of the camshaft immediately prior to the particular rotational position of the camshaft.
With the control apparatus for an engine driving motor, the engine can be started up efficiently in a short time using the engine driving motor which has a function of driving the crankshaft of the engine and another function of generating electric power with the power from the crankshaft.
The above and other objects, features and advantages of the present invention will become apparent from the following description and the appended claims, taken in conjunction with the accompanying drawings in which like parts or elements denoted by like reference symbols.
REFERENCES:
patent: 5311430 (1994-05-01), Ishigami
Evenson, McKeown, Edwards & Lenahan P.L.L.C.
Hitachi , Ltd.
Masih Karen
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