EP0619427A1 - Combustion engine provided with a starter and a current generator - Google Patents
Combustion engine provided with a starter and a current generator Download PDFInfo
- Publication number
- EP0619427A1 EP0619427A1 EP94102473A EP94102473A EP0619427A1 EP 0619427 A1 EP0619427 A1 EP 0619427A1 EP 94102473 A EP94102473 A EP 94102473A EP 94102473 A EP94102473 A EP 94102473A EP 0619427 A1 EP0619427 A1 EP 0619427A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- starter
- combustion engine
- current generator
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
Definitions
- This invention refers to internal combustion engines for motor vehicles provided with an electric starter and a current generator.
- One of the primary requirements in the designing of motor vehicles, in particular for so called “city cars”, is to reduce the overall weight of the vehicle so that it can be driven using less power and therefore with less fuel consumption and less pollution.
- the aim of this invention is to combine in a single electronic device the functions of the starter and of the current generator, simplifying at the same time the connection system to the combustion engine.
- the numeral 1 indicates an internal combustion engine (partially shown) provided with a camshaft (3), and connecting rods (4) and pistons (5).
- the crankshaft rotates in the engine block (7) on smooth bearings (8).
- a gear (12) is splined, devoted to the operation of the engine distribution (camshaft).
- a casing (14) is positioned around the end (10) of the camshaft (3), fixed in a known way by means of bolts (not shown), which incorporates an inlet (15) for the feeding of lubricating oil into the engine.
- Said casing (14) is made in the form of a circular shell, coaxially mounted to the crankshaft to form, with the windings (17) integrally mounted, the stator (18) of a brushless permanent magnet motor, in which the polarity can be inverted at any moment.
- a second circular shell (22) is splined, coaxially to the casing (14), through the interposition of a seal (24), on the crankshaft (3) of the internal combustion engine (1), the shell of which rotates together with the crankshaft and carries on its periphery a series of permanent magnets (26) (facing, at work, the windings (17) ) and forms the rotor (27) of the electric motor.
- Both components (14, 22) are cup shaped, positioned with their cavities facing each other and both components have an internal peripheral frontal rim, respectively (32) and (33), which cooperate to form, in counter rotation, a labyrinth seal for the protection of the motor (20).
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Control Of Eletrric Generators (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
Description
- This invention refers to internal combustion engines for motor vehicles provided with an electric starter and a current generator. One of the primary requirements in the designing of motor vehicles, in particular for so called "city cars", is to reduce the overall weight of the vehicle so that it can be driven using less power and therefore with less fuel consumption and less pollution.
- In current vehicles, to start the combustion engine and to generate the required levels of electric energy, two power units are used, a starter and a generator, which besides the cost, also have a significant impact on the total weight of the engine, both because of their weights and because of the connection systems and the transmission of movement to and from the combustion engine.
- The aim of this invention is to combine in a single electronic device the functions of the starter and of the current generator, simplifying at the same time the connection system to the combustion engine.
- This and other aims are reached with an internal combustion engine according to the introduction of the first claim, characterized in that the starter and the current generator are replaced by a brushless permanent magnet electric motor in which the rotor is splined directly to the drive shaft of the combustion engine, on its distribution side.
- Other characteristics and advantages will become clear from the following description which refers to the attached drawings, given by way of example only and in which:
- Figure 1 is a partial cross section view of an internal combustion engine provided with an electric motor according to the invention.
- Figure 2 is a cross section view of the electric motor manufactured in order to be mounted according to Figure 1.
- With reference to the figures, the numeral 1 indicates an internal combustion engine (partially shown) provided with a camshaft (3), and connecting rods (4) and pistons (5). The crankshaft rotates in the engine block (7) on smooth bearings (8).
- At the end (10) of the crankshaft (3), opposite to the end facing the gearbox, and therefore on the side usually called the distribution side, a gear (12) is splined, devoted to the operation of the engine distribution (camshaft). On the same side of the engine, a casing (14) is positioned around the end (10) of the camshaft (3), fixed in a known way by means of bolts (not shown), which incorporates an inlet (15) for the feeding of lubricating oil into the engine. Said casing (14) is made in the form of a circular shell, coaxially mounted to the crankshaft to form, with the windings (17) integrally mounted, the stator (18) of a brushless permanent magnet motor, in which the polarity can be inverted at any moment. A second circular shell (22) is splined, coaxially to the casing (14), through the interposition of a seal (24), on the crankshaft (3) of the internal combustion engine (1), the shell of which rotates together with the crankshaft and carries on its periphery a series of permanent magnets (26) (facing, at work, the windings (17) ) and forms the rotor (27) of the electric motor.
- On the external wall of the rotor (27) small staves (29) are placed at regular intervals (as an alternative, square teeth could be machined), which, in cooperation with a sensor (30) attached to the stator (18), will determine the rotational speed of the rotor. Both components (14, 22) are cup shaped, positioned with their cavities facing each other and both components have an internal peripheral frontal rim, respectively (32) and (33), which cooperate to form, in counter rotation, a labyrinth seal for the protection of the motor (20).
- The mechanism's way of working is already clear from the above. In fact it will be sufficient to control the rotational speed of the rotor, using the sensor (30), associated, if the case, to s sensor on the starter switch, to decide when to invert the polarity and to transform the electric motor (20) from a starter into a current generator.
- Besides the savings in cost and weight mentioned above, there will surely be less consumption of power increased efficiency of the internal combustion engine.
Claims (7)
- An internal combustion engine for motor vehicles of the type provided with at least one starter and one current generator connected to the drive shaft through systems in order to start the engine and to generate the necessary electric current for the engine to work, characterized in that the starter and the current generator are replaced by a brushless permanent magnet electric motor with a rotor splined directly to the drive shaft of the engine, coaxially to it and on its distribution side.
- An engine according to claim 1 characterized in that the stator of the electric motor is attached directly to the engine block of the internal combustion engine, coaxially to the axis of its drive shaft.
- An engine according to claims 1 and 2 characterized in that both the stator and the rotor are circular cup-shaped casings.
- An engine according to claims 1 and 2 characterized in that the stator is one of the casings of the engine block of the internal combustion engine.
- An engine according to claim 3 characterized in that the rotor has staves placed at regular intervals on its external surface.
- An engine according to claim 3 characterized in that the rotor has square teeth machined on its external surface.
- An engine according to claims 5 and 6 characterized in that a sensor able to detect the passage of the staves or of the teeth is mounted on the stator.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO930233A IT1261543B (en) | 1993-04-06 | 1993-04-06 | THERMAL MOTOR WITH STARTER MOTOR AND CURRENT GENERATOR |
ITTO930233 | 1993-04-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0619427A1 true EP0619427A1 (en) | 1994-10-12 |
EP0619427B1 EP0619427B1 (en) | 1996-06-12 |
Family
ID=11411352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94102473A Expired - Lifetime EP0619427B1 (en) | 1993-04-06 | 1994-02-18 | Combustion engine provided with a starter and a current generator |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0619427B1 (en) |
DE (1) | DE69400241T2 (en) |
IT (1) | IT1261543B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2347401A (en) * | 1999-03-03 | 2000-09-06 | Ford Global Tech Inc | Alignment of an electric motor with a vehicle engine crankshaft |
EP1048845A1 (en) * | 1999-04-27 | 2000-11-02 | Honda Giken Kogyo Kabushiki Kaisha | Starter/generator for motor vehicles |
EP1112885A1 (en) * | 1999-12-30 | 2001-07-04 | Peugeot Citroen Automobiles SA | Drive shaft arrangement for a gearbox for hybrid vehicle |
ES2163994A1 (en) * | 1998-09-28 | 2002-02-01 | Honda Motor Co Ltd | Transmission structure of two wheeled motor vehicle, has start cum power generation device provided in a transmission case of rear wheel from reverse side end and connected to crank shaft |
US10293804B2 (en) | 2016-05-19 | 2019-05-21 | GM Global Technology Operations LLC | Hybrid vehicle engine starter systems and methods |
US10330070B2 (en) | 2017-11-14 | 2019-06-25 | Gm Global Technology Operations Llc. | Method and apparatus for operating a starter for an internal combustion engine |
US10408184B1 (en) | 2018-05-01 | 2019-09-10 | GM Global Technology Operations LLC | Brushless electric starter system with closed-loop speed synchronization control methodology |
US10436167B1 (en) | 2018-04-24 | 2019-10-08 | GM Global Technology Operations LLC | Starter system and method of control |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10505415B2 (en) | 2016-05-19 | 2019-12-10 | GM Global Technology Operations LLC | Permanent magnet electric machine |
US10184442B2 (en) | 2016-05-19 | 2019-01-22 | GM Global Technology Operations LLC | Permanent magnet electric machine |
US10036359B2 (en) | 2016-05-19 | 2018-07-31 | GM Global Technology Operations LLC | Hybrid vehicle engine starter control systems and methods |
US10605217B2 (en) | 2017-03-07 | 2020-03-31 | GM Global Technology Operations LLC | Vehicle engine starter control systems and methods |
US10574116B2 (en) | 2018-04-24 | 2020-02-25 | GM Global Technology Operations LLC | Starter including a switched reluctance electric motor |
US11015564B2 (en) | 2018-04-24 | 2021-05-25 | GM Global Technology Operations LLC | Starter for an internal combustion engine |
US10544772B2 (en) | 2018-04-24 | 2020-01-28 | GM Global Technology Operations LLC | Bus voltage stabilization in powertrain having electric starter system with polyphase brushless starter motor |
US10886817B2 (en) | 2018-04-24 | 2021-01-05 | GM Global Technology Operations LLC | On-axis brushless starter assembly |
US10480476B2 (en) | 2018-04-24 | 2019-11-19 | GM Global Technology Operations LLC | Starter system and method of control |
US10473081B1 (en) | 2018-04-24 | 2019-11-12 | GM Global Technology Operations LLC | Powertrain with AC brushless starter and sensor/sensorless control method |
US10677212B2 (en) | 2018-05-01 | 2020-06-09 | GM Global Technology Operations LLC | Method and apparatus for controlled stopping of internal combustion engine |
US10487791B1 (en) | 2018-05-01 | 2019-11-26 | GM Global Technology Operations LLC | Temperature control strategy for electric starter system with polyphase brushless starter motor |
US10724491B2 (en) | 2018-05-01 | 2020-07-28 | GM Global Technology Operations LLC | Brushless starter system with pinion pre-engagement control |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6161964A (en) * | 1984-08-31 | 1986-03-29 | Mazda Motor Corp | Control device of engine |
JPS61154464A (en) * | 1984-12-27 | 1986-07-14 | Mazda Motor Corp | Motor driven generator of engine |
US4918323A (en) * | 1987-02-12 | 1990-04-17 | Mitsubishi Denki Kabushiki Kaisha | Engine starting and charging device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8603590D0 (en) * | 1986-02-13 | 1986-03-19 | Lucas Ind Plc | Dynamo electric machines |
US5097140A (en) * | 1991-05-07 | 1992-03-17 | Chrysler Corporation | Alternator starter |
-
1993
- 1993-04-06 IT ITTO930233A patent/IT1261543B/en active IP Right Grant
-
1994
- 1994-02-18 DE DE69400241T patent/DE69400241T2/en not_active Expired - Fee Related
- 1994-02-18 EP EP94102473A patent/EP0619427B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6161964A (en) * | 1984-08-31 | 1986-03-29 | Mazda Motor Corp | Control device of engine |
JPS61154464A (en) * | 1984-12-27 | 1986-07-14 | Mazda Motor Corp | Motor driven generator of engine |
US4918323A (en) * | 1987-02-12 | 1990-04-17 | Mitsubishi Denki Kabushiki Kaisha | Engine starting and charging device |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 10, no. 227 (M - 505)<2283> 7 August 1986 (1986-08-07) * |
PATENT ABSTRACTS OF JAPAN vol. 10, no. 356 (E - 459)<2412> 29 November 1986 (1986-11-29) * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2163994A1 (en) * | 1998-09-28 | 2002-02-01 | Honda Motor Co Ltd | Transmission structure of two wheeled motor vehicle, has start cum power generation device provided in a transmission case of rear wheel from reverse side end and connected to crank shaft |
CN1110625C (en) * | 1998-09-28 | 2003-06-04 | 本田技研工业株式会社 | Motor-driven bike |
GB2347401A (en) * | 1999-03-03 | 2000-09-06 | Ford Global Tech Inc | Alignment of an electric motor with a vehicle engine crankshaft |
GB2347401B (en) * | 1999-03-03 | 2003-08-20 | Ford Global Tech Inc | A vehicle motor alignment |
EP1048845A1 (en) * | 1999-04-27 | 2000-11-02 | Honda Giken Kogyo Kabushiki Kaisha | Starter/generator for motor vehicles |
EP1112885A1 (en) * | 1999-12-30 | 2001-07-04 | Peugeot Citroen Automobiles SA | Drive shaft arrangement for a gearbox for hybrid vehicle |
FR2803251A1 (en) * | 1999-12-30 | 2001-07-06 | Peugeot Citroen Automobiles Sa | DEVICE FOR DRIVING THE PRIMARY SHAFT OF A GEARBOX FOR A HYBRID-DRIVEN VEHICLE |
US10293804B2 (en) | 2016-05-19 | 2019-05-21 | GM Global Technology Operations LLC | Hybrid vehicle engine starter systems and methods |
US10330070B2 (en) | 2017-11-14 | 2019-06-25 | Gm Global Technology Operations Llc. | Method and apparatus for operating a starter for an internal combustion engine |
US10436167B1 (en) | 2018-04-24 | 2019-10-08 | GM Global Technology Operations LLC | Starter system and method of control |
US10408184B1 (en) | 2018-05-01 | 2019-09-10 | GM Global Technology Operations LLC | Brushless electric starter system with closed-loop speed synchronization control methodology |
Also Published As
Publication number | Publication date |
---|---|
ITTO930233A0 (en) | 1993-04-06 |
ITTO930233A1 (en) | 1994-10-06 |
DE69400241T2 (en) | 1997-01-30 |
IT1261543B (en) | 1996-05-23 |
DE69400241D1 (en) | 1996-07-18 |
EP0619427B1 (en) | 1996-06-12 |
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