Patent US6018199A successfully refreshed from Google Patents.
US6018199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starter for engine equipped with motor generator
Assignee: Mitsubishi Electric Corp
•
Filing: 1998-09-21
•
Granted: 2000-01-25
•
Expires: 2018-09-21
Abstract
Abstract A starter for an engine equipped with a motor generator achieves lower cost and reduced sizes and capacities of circuit elements by reducing the assist load on the motor generator: it is provided with a motor generator (2) and a starting motor (10) connected to an engine (1); a startup state determining circuit (20) which determines the startup state from operating condition and selectively issues ON signals M1 and M2 to the motor generator and the starting motor; a key switch (6) which generates a start signal (Qe) at the time of starting the engine; and a temperature sensor 12 which generates a temperature signal (Te) corresponding to the temperature of the engine. The startup state determining circuit actuates only the motor generator as a motor in a startup state wherein the temperature signal indicates not less than a predetermined temperature corresponding to the warm-up state of the engine, while it actuates both the starting motor and the motor generator in a startup state wherein the temperature signal indicates a temperature below the predetermined temperature. And the startup state determining circuit actuates the starting motor first, then actuates the motor generator after a delay time corresponding to a rush current period of the starting motor has elapsed in the second startup state.
Inventors
- 👤 Shigeru Shiroyama
- 👤 Motoi Hisamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:02
CPC Classifications
B; B60; B60K; B60K6/00; B60K6/20; B60K6/42; B60K6/48; B60K6/485; B60W; B60W20/00; B60W20/10; B60W10/00; B60W10/04; B60W10/06; B60W10/08; B60W10/30; F; F02; F02N; F02N11/00; F02N11/006; F02N11/04; F02N11/08; F02N2011/0881; F02N2011/0896; F02N2200/00; F02N2200/02; F02N2200/023; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
289 words
A starter for an engine equipped with a motor generator, comprising: a motor generator directly connected to an engine; a battery connected to said motor generator via an inverter; a motor generator control circuit for controlling said motor generator via said inverter; a starting motor composed of a DC motor connected to said engine at the time of startup; an ON/OFF switch for selectively switching the feed of power from said battery to said starting motor; various sensors for detecting the operating condition of said engine; and a startup state determining circuit which determines the startup state of said engine according to the operating condition of said engine and selectively issues ON signals to said ON/OFF switch and said motor generator control circuit; wherein said various sensors include a key switch for generating a startup signal at the time of starting up said engine and a temperature sensor for generating a temperature signal corresponding to the temperature of said engine; said startup state determining circuit issues the ON signal only to said motor generator control circuit to actuate said motor generator as a motor in a first startup state wherein said temperature signal indicates not less than a predetermined temperature which corresponds to the warm-up state of said engine, while it issues the ON signal to both said ON/OFF switch and said motor generator control circuit to actuate both said starting motor and said motor generator in a second startup state wherein said temperature signal indicates a temperature below said predetermined temperature; and said startup state determining circuit actuates said starting motor first, then actuates said motor generator after a delay time corresponding to a rush current period of said starting motor has elapsed in said second startup state.
Claim 2
Dependent Claim
289 words
A starter for an engine equipped with a motor generator, comprising: a motor generator directly connected to an engine; a battery connected to said motor generator via an inverter; a motor generator control circuit for controlling said motor generator via said inverter; a starting motor composed of a DC motor connected to said engine at the time of startup; an ON/OFF switch for selectively switching the feed of power from said battery to said starting motor; various sensors for detecting the operating condition of said engine; and a startup state determining circuit which determines the startup state of said engine according to the operating condition of said engine and selectively issues ON signals to said ON/OFF switch and said motor generator control circuit; wherein said various sensors include a key switch for generating a startup signal at the time of starting up said engine and a temperature sensor for generating a temperature signal corresponding to the temperature of said engine; said startup state determining circuit issues the ON signal only to said motor generator control circuit to actuate said motor generator as a motor in a first startup state wherein said temperature signal indicates not less than a predetermined temperature which corresponds to the warm-up state of said engine, while it issues the ON signal to both said ON/OFF switch and said motor generator control circuit to actuate both said starting motor and said motor generator in a second startup state wherein said temperature signal indicates a temperature below said predetermined temperature; and said startup state determining circuit actuates said starting motor first, then actuates said motor generator after a delay time corresponding to a rush current period of said starting motor has elapsed in said second startup state.
Claim 3
Dependent Claim
29 words
A starter for an engine equipped with a motor generator according to claim 1, wherein: said delay time is set within a range of 0.01 sec. to 0.5 sec.
Claim 4
Dependent Claim
316 words
A starter for an engine equipped with a motor generator, comprising: a motor generator directly connected to an engine; a battery connected to said motor generator via an inverter; a motor generator control circuit for controlling said motor generator via said inverter; a starting motor connected to said engine at the time of startup; an ON/OFF switch for selectively switching the feed of power from said battery to said starting motor; various sensors for detecting the operating condition of said engine which include a revolution sensor generating a revolution signal corresponding to the number of revolutions of said engine; and a startup state determining circuit which determines the startup state of said engine according to the operating condition of said engine and selectively issues ON signals to said ON/OFF switch and said motor generator control circuit; wherein said various sensors include a key switch for generating a startup signal at the time of starting up said engine and a temperature sensor for generating a temperature signal corresponding to the temperature of said engine; said startup state determining circuit issues the ON signal only to said motor generator control circuit to actuate said motor generator as a motor in a first startup state wherein said temperature signal indicates not less than a predetermined temperature which corresponds to the warm-up state of said engine, while it issues the ON signal to both said ON/OFF switch and said motor generator control circuit to actuate both said starting motor and said motor generator in a second startup state wherein said temperature signal indicates a temperature below said predetermined temperature; and the startup state determining circuit stops the ON signal to said ON/OFF switch if said revolution signal indicates not less than a first predetermined number of revolutions corresponding to the cranking speed of said engine after said starting motor and said motor generator are actuated in said second startup state.
Claim 5
Dependent Claim
316 words
A starter for an engine equipped with a motor generator, comprising: a motor generator directly connected to an engine; a battery connected to said motor generator via an inverter; a motor generator control circuit for controlling said motor generator via said inverter; a starting motor connected to said engine at the time of startup; an ON/OFF switch for selectively switching the feed of power from said battery to said starting motor; various sensors for detecting the operating condition of said engine which include a revolution sensor generating a revolution signal corresponding to the number of revolutions of said engine; and a startup state determining circuit which determines the startup state of said engine according to the operating condition of said engine and selectively issues ON signals to said ON/OFF switch and said motor generator control circuit; wherein said various sensors include a key switch for generating a startup signal at the time of starting up said engine and a temperature sensor for generating a temperature signal corresponding to the temperature of said engine; said startup state determining circuit issues the ON signal only to said motor generator control circuit to actuate said motor generator as a motor in a first startup state wherein said temperature signal indicates not less than a predetermined temperature which corresponds to the warm-up state of said engine, while it issues the ON signal to both said ON/OFF switch and said motor generator control circuit to actuate both said starting motor and said motor generator in a second startup state wherein said temperature signal indicates a temperature below said predetermined temperature; and the startup state determining circuit stops the ON signal to said ON/OFF switch if said revolution signal indicates not less than a first predetermined number of revolutions corresponding to the cranking speed of said engine after said starting motor and said motor generator are actuated in said second startup state.
Claim 6
Dependent Claim
62 words
A starter for an engine equipped with a motor generator according to claim 3, wherein: said startup state determining circuit stops the ON signal to said motor generator control circuit if said revolution signal indicates not less than a second predetermined number of revolutions corresponding to the idling speed of said engine after the ON signal to said ON/OFF switch is stopped.
Claim 7
Dependent Claim
91 words
A starter for an engine equipped with a motor generator according to claim 3, wherein: said various sensors include a revolution sensor generating a revolution signal corresponding to the number of revolutions of said engine; and said startup state determining circuit stops the ON signals to said ON/OFF switch and said motor generator control circuit if said revolution signal indicates not less than a predetermined number of revolutions corresponding to the idling speed of said engine after said starting motor and said motor generator are actuated in said second startup state.
References Cited (Backward Citations)
US4495905A
Cited
JPS62150074A
Cited
JPH01138369A
Cited
US4959595A
Cited
US4862009A
Cited
US5075616A
Cited
US5111057A
Cited
US5563454A
Cited
US5642696A
Cited
US5818115A
Cited
JPH1068374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-01-24 | 2003-07-26 | 2004-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-24 | 2007-07-26 | 2008-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-24 | 2011-07-26 | 2012-01-25 | $7700.00 | Window Closed / Lapsed |