Title:
FLYWHEELSTARTER/GENERATOR FOR I.C.-ENGINES
Document Type and Number:
WIPO Patent Application WO/2000/052329
Kind Code:
A2
Abstract:
This invention relates to an electric machine which may act as a (flywheel)-starter-motor, and/or a generator for internal-combustion-engines (called i.c.engines or engines hereafter). A planetary gear/brake/clutch arrangement offers two gear-speeds and a freewheel. Thanks to the freewheel-mode, the machine may be permanently connected to the i.c.engine and is therefore perfectly suited for turbo-compounding, offering a fast shaft to combine an exhaust-turbine with a, preferably, non-turbo compressor. The invention moreover relates to the various practical forms, matching control-devices and auxiliaries which enable the machine to be used in a number of different applications. The electric configuration of the machines used, may differ, depending on the application.
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Inventors:
SCHUURSMA JOHANNES KAREL (NL)
Application Number:
PCT/NL1999/000626
Publication Date:
September 08, 2000
Filing Date:
October 08, 1999
Export Citation:
Assignee:
SCHUURSMA JOHANNES KAREL (NL)
International Classes:
F02N5/04; F02N11/00; F02N11/04; F02N15/04; (IPC1-7): F02N11/04
Domestic Patent References:
| WO1989004081A1 | 1989-05-05 |
Foreign References:
| US4459536A | 1984-07-10 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 006, no. 267 (M-182), 25 December 1982 (1982-12-25) & JP 57 159956 A (NISSAN JIDOSHA KK), 2 October 1982 (1982-10-02)
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Claims:
CLAIMS
| 1. | 1 Electric machine for starting combustion engines where one side of the rotor of said machine is connected to the sunwheel of a planetary gear and the other side of said rotor is connected to a flywheel. |
| 2. | Electric machine according to previous claim where the outgoing shaft of said planetary gear is connected to its planetcarrier and the other side of said shaft is connected to the engine, be it directly or using the usual starterconstruction of a splined sheath and solenoid arrangement moving a gear into contact with the engineftywheel. |
| 3. | Electric machine according to previous claims where the ringwheel of said planetary gear is connected to a brake, preferably of the tape and drum type which, in free running mode, may permit the accumulation of kinetic energy in said flywheel, while in brake mode said energy may be released to start said engine c. q. permits a conventional directstart. |
| 4. | Electric circuit for a machine according to one or more of the preceding claims where, for dieselengines, in order to limit the powerbuiltup in said flywheel during spinup, said machine may be connected in series with a series, parallel, or seriesparallelarrangement of the glowplugs of said engine. |
| 5. | Electronic circuit for a machine according to one or more of the preceding claims where, in order to establish the necessity for a flywheelstart and its eventual spinup time and, for diesels, the preglowtime, enginetemperature and/or the voltagedrop of the battery is measured the latter during the first revolutions of a direct start of said engine, preferably using a seriesswitched zenerdiode forming a threshold beneath which said brake is deactivated for spinup of said flywheel. |
| 6. | Electronic circuit according to the preceding claim where, for timing, a condenser is charged and/or discharged by a circuit of two antiparallel diodes, both connected to the battery via seriesresistors, whereby the value of the discharge resistor is chosen to allow for at least several revolutions of said engine during the initial direct start, and the value of the charge resistor is chosen to allow for sufficient spinup time for said flywheel. |
| 7. | Electric machine according to one or more of the preceding claims where, for a doublefunction as generator said machine is, more or less directly, coupled to (the crankshaft of) said engine and the servosystem allows for a fixation of said planetary gear together with previous measures allowing for a twospeed plus freewheelmode. |
| 8. | Electric machine according to one or more of the preceding claims where the machine may be inversely built and flywheelmass added to said rotor. |
| 9. | Electric machine according to one or more of the preceding claims where the machines rotor is connected to a turbineshaft, whether or not using extra gears or clutches, whether or not combined with one or more nonturbo compressor (s) on said turbineshaft. |
| 10. | Controlsystem for an electric machine according to the preceding claim where sudden changes of the enginespeed results in a freewheelmode of said machine during which a twoquadrant inverter may go into generator or motormode to control or boost said compressorspeed and/or the gearing of said machine may be forced in a slipping firstgear mode to mechanically boost said compressorspeed. |
Description:
1 ernational application No. INTERNATIONAL SEARCH REPORT PCT/NL 99/00626 Box 1 Observations where certain claims were found unsearchable (Continuation of item 1 of first sheet) This International Search Report has not been established in respect of certain claims under Article 17 (2) (a) for the following reasons: 1.2 ClaimsNos.: because they relate to subject matter not required to be searched by this Authority, namely : 2. C Claims Nos. : because they relate to parts of the International Application that do not comply with the prescribed requirements to such an extent that no meaningful International Search can be carried out, specifically: 3. 2 Cíaims Nos. : because they are dependent claims and are not drafted in accordance with the second and third sentences of Rule 6.4 (a). Box 11 Observations where unity of invention is lacking (Continuation of item 2 of first sheet) This International Searching Authority found multiple inventions in this international application, as follows: see additional sheet 1. 0 As all required additional search fees were timely paid by the applicant, this International Search Report covers all searchable claims. 2. As As all searchable claims could be searched without effort justifying an additional fee, this Authority did not invite payment of any additional fee. 3. As only some of the required additional search fees were timely paid by the applicant, this International Search Report covers only those claims for which fees were paid, specifically claims Nos. : 4 2 No required additional search fees were timely paid by the applicant. Consequently, this International Search Report is restricted to the invention first mentioned in the claims; it is covered by claims Nos. : 1-3,8 Remark on Protest The additional search fees were accompanied by the applicant's protest. u § No protest accompanied the payment of additional search fees. __ International Application No. PCT/NL 99/00626 FURTHER INFORMATION CONTINUED FROM PCT/ISA/210 This International Searching Authority found multiple (groups of) inventions in this international application, as follows: 1. Claims: 1-3,8 Electric machine for starting combustion engines where one side of the rotor of said machine is connected to the sun-wheel of a planetary gear and the other side of said rotor is connected to a flywheel [Claims 1-3,8, and 9-11 (insofar dependent on claim 1)]. 2. Claims: 4-7 Electric circuit for a flywheelstartmotor for diesel engines, whereby, in order to limit power-built-up during an occasionally preglow period, the glow plugs are connected in series with electrical machine [Claims 4-7, and 9-11 (insofar dependent on claim 4)]. INTERNATIONAL SEARCH REPORT International Application No 'ormationonpatenttamilymembers | Pt, NL 99/00626 l Patent document Publication Patent family Publication cited in search report date member (s) date JP 57159956 A 02-10-1982 NONE WO 8904081 A 05-05-1989 NL 8702588 A 16-05-1989 AU 2619888 A 23-05-1989 EP 0391939 A 17-10-1990 US 4459536 A 10-07-1984 DE 3135891 A 24-03-1983 FR 2512406 A 11-03-1983 JP 1727318 C 19-01-1993 JP 4013960 B 11-03-1992 JP 58059367 A 08-04-1983
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