Machine element or mechanism – Engine starters
Patent
1988-10-06
1990-02-06
McCall, James T.
Machine element or mechanism
Engine starters
74 7C, 123179D, F02N 1700
Patent
active
048980382
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an engine starting and charging device that a starting motor for starting an engine and a charging generator driven by the engine to charge a battery are formed as one unit.
2. Prior Art
An engine starting and charging device comprising a starting motor and a charging generator as one unit has been suggested as a prior art, for example, one disclosed in laid-Open Japanese Patent No. Sho 61-54949.
FIG. 1 is a sectional view of a prior-art engine starting and charging device disclosed in Laid-Open Japanese Patent No. Sho 61-54959. In FIG. 1, a starting and charging device body 1 comprises revolving field poles 2a, 2b, a field coil 3, an armature core 4, an armature coil 5, and a crank angle detector 6 as major components.
The revolving field poles 2a, 2b are a pair of comb-shaped field poles produced of a ferromagnetic material, which are coupled as a unit through a ring 7 of non-magnetic material such that those magnetic pole sections are disposed alternately in the circumferential direction. The field pole 2a functions as a flywheel and also as a clutch carrier described later, is fitted on an engine crankshaft 8, and fixed on the end of the crankshaft 8 by a bolt 9. Numeral 10 is a cutout formed at the side portion of the field pole 2a, which, combined with the crank angle detector 6, is used to detect the crank angle; the same number of cutouts as the number of magnetic poles of the field pole 2a are provided at equal intervals around the circumference. The width of the cutout 10 in the circumferential direction makes an angle equal to about one half of 360 degrees divided by the number of the cutouts.
The field coil 3, which is for exciting the field poles 2a, 2b, is mounted on the field core 11. This field core is mounted and fixed to a rear plate 12 by bolts not illustrated, facing the field pole 2a across a slight gap a in the axial direction and the field pole 2b across a slight gap b in the diametrical direction.
The armature core 4 is formed by laminating silicon steel sheets, within the inner periphery of which are provided a large number of slots for setting the armature coil 5 therein, the armature coil 5 being of a three-phase distributed winding type as a common commutatorless motor. The armature core 4 is properly positioned and fixed in relation to a mounting frame 13, which is secured by bolts 14 to a rear plate 12 mounted on an engine body not illustrated. Numeral 15 is a spacer for axially securing the armature core 4 to the mounting frame 13, and numeral 16 is a spring ring.
The crank angle detector 6 serves as a signal source that operates an armature current switching circuit not illustrated, and uses an oscillation-type proximity switch. This proximity switch is so mounted on the rear plate 12 that its detecting element faces on the circumferential line where the cutouts 10 of the field pole 2a is provided, and its oscillating conditions vary with the change of inductance at the cutout and non-cutout sections of the field pole 2a, outputting a binary signal "1" and "0" corresponding to the crank angle (field pole position). When a three-phase armature coil 5 is employed, there will be installed three crank angle detectors 6.
Numeral 17 is a clutch which connects the engine crankshaft 8 to, or disconnects it from, a transmission drive shaft 18 for the interruption of power transmission, and uses a diaphragm spring clutch comprising a clutch disc 19, a pressure plate 20, a diaphragm spring (disc spring) 21, wire rings 22, 23, and a clutch cover 24. The clutch cover 24 is mounted by bolts 25 to the field pole 2a. The clutch 17 as such, as is well known, is of the constitution that when a clutch pedal (not illustrated) is not depressed, the tension of the diaphragm spring 21 is exerted to the clutch disc mounted on the transmission drive shaft 18 through the pressure plate 20 by lever ation, pressing this clutch disc 19 against the side of the field pole 2a and accordingly connecting the clutch.
When
REFERENCES:
patent: 1726760 (1929-09-01), Otwell
patent: 4257281 (1981-03-01), Bunger
patent: 4456830 (1984-06-01), Cronin
patent: 4473752 (1984-09-01), Cronin
patent: 4517466 (1985-05-01), Ogawa
patent: 4624351 (1986-11-01), Lutz et al.
McCall James T.
Mitsubishi Denki & Kabushiki Kaisha
LandOfFree
Engine starting and charging device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Engine starting and charging device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Engine starting and charging device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-435884