DE102012009237A1 - Internal combustion engine e.g. petrol engine, for motor car, has starter-generator designed as modular unit in form of intermediate ring and arranged on crankshaft between gear box and engine - Google Patents

Abstract

The engine (1) has a starter-generator (2) arranged on a crankshaft (3) between a gear box (20) and the engine, where the generator is designed as a modular unit in the form of an intermediate ring. The generator is provided with an integrated control unit (10) and a segmented and riveted resolver (9). The gear box is formed as an automatic gear box with a torque converter (5). The resolver includes a resolver stator (15) and a two-piece resolver collar (16) that is arranged at a rotor (7) or at the torque converter in a torque-proof manner. The starter generator and the control unit are operated in an operation voltage of about 48 volts.

Description

The invention relates to an internal combustion engine with an integrated starter generator and a coupled transmission according to the preamble of patent claim 1.

The DE 102 21 562 A1 describes a device for connecting a crankshaft to a transmission shaft, in particular in an internal combustion engine, with a dual mass flywheel, which has a drive-side flywheel and a driven side flywheel, and with an electric starter generator having a stator and a rotor, the rotor outside is arranged of the stator and is in drive connection with the drive-side flywheel.

The invention has for its object to provide a comparison with the prior art improved internal combustion engine with an integrated starter generator and a coupled transmission.

The object is achieved by the features specified in claim 1.

Advantageous developments of the invention are the subject of the dependent claims.

In the internal combustion engine with an integrated starter generator and a coupled transmission, the starter generator is formed as an internal rotor and as a modular unit in the form of an intermediate ring and arranged between the transmission and internal combustion engine on or on a crankshaft, the starter generator comprising an integrated control unit and a segmented and riveted resolver ,

Particularly advantageously, such an intermediate ring on a reduced compared to conventional starter generators depth.

The elimination of separate starters and alternators, the cost of the motor vehicle are significantly reduced.

Advantageously, all types of transmissions with the internal combustion engine can be combined with a starter generator designed according to the invention, in particular, manual, automated, automatic transmissions with torque converter or a double clutch, transmission with wet or dry clutch.

The starter generator is advantageously designed as a modular unit in the form of an intermediate ring and can be combined with different transmissions and / or internal combustion engines. In this case, such an intermediate ring is preferably designed such that. Its arrangement is made possible between a conventional internal combustion engine and a conventional transmission. As a result, a redesign of a transmission is avoided and conventional transmissions are reusable.

By using an operating voltage of 48 volts, a high-voltage certification required by conventional operating voltages of 120 volts is obsolete. As a result, the related costs are avoided.

Particularly advantageously, no high-voltage network is necessary in the vehicle so that operational safety of the vehicle is significantly increased.

Furthermore, a conventionally required high-voltage battery is avoided in this way and the control unit can be dimensioned smaller according to the reduced operating voltage. These measures reduce vehicle weight, resulting consumption, and vehicle manufacturing cost.

Embodiments of the invention are explained in more detail below with reference to drawings.

Showing:

1 1 is a schematic partial sectional side view of a starter generator according to the invention and adjacent components of the internal combustion engine and of the transmission;

2 schematically an end view of the starter generator from 1 and

3 schematically a front view of the 2 opposite side of the starter generator 1 with resolver.

Corresponding parts are provided in all figures with the same reference numerals.

1 schematically shows a partial side sectional view of a inventively designed starter generator 2 and adjacent components of an internal combustion engine 1 and a gearbox 20 ,

Here is the internal combustion engine 1 designed as a conventional internal combustion engine for a motor vehicle, for example as a diesel or gasoline engine.

The starter generator 2 combines the functions of a conventional starter and a conventional alternator in a single electric machine. The starter generator 2 can in its function as a starter both the internal combustion engine 1 accelerate the motor vehicle, as well as in its function as a generator or alternator in running internal combustion engine 1 generate electricity.

Furthermore, such a starter generator 2 recuperate electrical energy in vehicle operation by converting kinetic energy into electrical energy when braking the motor vehicle and initiating it in an electrical system of the motor vehicle. With this recuperated electrical energy is in the further vehicle operation support and / or discharge of the internal combustion engine 1 allows.

starter generators 2 can be belt driven with a crankshaft of the internal combustion engine 1 be coupled or directly or in sections on a crankshaft of the internal combustion engine 1 be arranged.

Because starter generators 2 constantly with the internal combustion engine 1 mechanically coupled, eliminates the usual noise in the conventional starter, which arises when the starter pinion and when turning the pinion in the flywheel of the engine.

The internal combustion engine 1 includes at least one conventional crankshaft 3 , which end receiving means 4 , For example, threaded holes has. At a central receiving means 4 is for example a conventional flywheel with a clutch pressure plate of a manual transmission or preferably a conventional torque converter 5 an automatic transmission 20 arranged.

In particular, all types of gears can be used 20 with the internal combustion engine 1 with a starter generator according to the invention 2 Combine, in particular manual, automated, automatic transmissions with torque converter or a dual clutch and transmission with wet or dry clutch.

The torque converter 5 is preferably by means of a stiffening sleeve 6 non-rotatable with the crankshaft 3 coupled at a predeterminable distance.

The starter generator 2 includes a rotor 7 , a stator 8th , a resolver 9 and a control unit 10 and is designed as an internal rotor.

The starter generator 2 is designed as a modular unit in the form of an intermediate ring and so with different gears 20 and / or internal combustion engines 1 combined. In this case, such an intermediate ring is preferably designed such that its arrangement between a conventional internal combustion engine 1 and a conventional transmission 20 is possible.

The rotor 7 is formed in a conventional manner hollow cylinder-like and comprises a preferably rotationally symmetrical rotor carrier 11 , on which outside circumferential permanent magnets 12 are arranged with iron carriers. The rotor 7 is in the area of the stiffening sleeve 6 , therefore between internal combustion engine 1 and a gearbox 20 arranged.

The rotor carrier 11 is by means of the receiving means 4 and not shown conventional fasteners, such as screws, rotationally fixed to the crankshaft 3 arranged.

In 2 is schematically an end view of the starter generator from 1 represented, in this view, the stator 8th of the starter generator is visible as a ring.

The stator 8th is a majority of the rotor 7 formed on the outside circumferentially arranged windings and fixed to the frame with a housing 13 the internal combustion engine 1 coupled.

In an embodiment, not shown, the starter generator 2 comprise a separate housing.

In a preferred embodiment, the starter generator 2 in a gearbox 14 integrated, which starter generator 2 and a not-shown gear 20 surrounds at least in the circumferential direction.

In 3 is a schematic front view of the 2 opposite side of the starter generator 1 shown a resolver 9 as a ring shows.

The resolver 9 is designed as a conventional resolver, which is an electromagnetic transducer for converting the angular position of a rotor into an electrical variable.

The resolver 9 is formed in three parts and includes a resolver 15 and a two-part Resolverkranz 16 ,

The resolver 9 , in particular Resolverkranz 16 , is on the rotor 7 or more preferably on the torque converter 5 arranged rotationally fixed. Here is the Resolverkranz 16 for example with the torque converter 5 riveted.

The resolver 9 is segmented in a manner not shown.

The Resolverkranz 16 comprises in a manner not shown conventional electric sheets and a non-magnetic aluminum ring with an incremental ring, which are riveted together in a preferred embodiment.

As in 1 shown, the starter generator 2 have a cooling, including, for example, cooling channels 17 in the form of a circulating cooling jacket in the gearbox 14 are formed.

Such cooling channels 17 can in alternative, not shown embodiments in a separate housing of the starter generator 2 , in the stator 8th itself or between the stator 8th and a housing.

The cooling channels 17 are traversed in a conventional manner by a coolant or a lubricant.

The control unit 10 is preferably designed as conventional power electronics and comprises means for controlling and / or regulating the starter generator 2 ,

The control unit 10 may in a preferred embodiment in the overlap region of the starter generator 2 outside the gearbox 14 be arranged and from a separate housing 18 be enclosed. In this case, by means of a concealed and direct contact with the electrical components of the starter generator 2 through the gearbox 14 through an integration of the control unit 10 at the starter generator 2 be made such that an inaccessible from the outside and thus particularly fail-safe electrical connection is made possible with particularly short cable routes.

Furthermore, with this hidden contact a secure shielding of the electrical connection cables between the control unit 10 and starter generator 2 allows, in particular, high-voltage cables are securely shielded against the environment.

In an alternative embodiment, the housing 18 in which the control unit 10 is arranged, and a part of the transmission housing 14 be and be designed as a common component.

For receiving the control unit 10 can in the gearbox 14 a corresponding receiving section 19 be formed, which is formed for example as a bulge, flattening or recess.

The starter generator 2 and the associated control unit 10 are designed and optimized for an operating voltage of 48 volts.

In this way, a legally required at conventional operating voltages of 120 volts high-voltage certification is obsolete.

Particularly advantageously, no high-voltage network is necessary in the vehicle so that operational safety of the vehicle is significantly increased.

Furthermore, a conventionally required high-voltage battery is avoided in this way and the control unit 10 can be dimensioned smaller according to the reduced operating voltage.

LIST OF REFERENCE NUMBERS

1

Internal combustion engine

2

starter generator

3

crankshaft

4

receiving means

5

torque converter

6

stiffening sleeve

7

rotor

8th

stator

9

resolver

10

control unit

11

rotorarm

12

permanent magnet

13

casing

14

gearbox

15

resolver

16

Resolverkranz

17

cooling channel

18

casing

19

receiving portion

20

transmission

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10221562 A1 [0002]

Claims (8)

Internal combustion engine ( 1 ) with an integrated starter generator ( 2 ) and a coupled transmission ( 20 ), characterized in that the starter generator ( 2 ) is formed as an internal rotor and as a modular unit in the form of an intermediate ring and between transmission ( 20 ) and internal combustion engine ( 1 ) on or on a crankshaft ( 3 ), wherein the starter generator ( 2 ) an integrated control unit ( 10 ) and a segmented and riveted resolver ( 9 ). Internal combustion engine ( 1 ) according to claim 1, characterized in that the starter generator ( 2 ) and the associated integrated control unit ( 10 ) have an operating voltage of 48 volts. Internal combustion engine ( 1 ) according to claim 1 or 2, characterized in that the coupled transmission ( 20 ) is designed as a manual, automated or automatic transmission. Internal combustion engine ( 1 ) according to one of the preceding claims, characterized in that the transmission ( 20 ) as an automatic transmission with a torque converter ( 5 ) is trained. Internal combustion engine ( 1 ) according to one of the preceding claims, characterized in that the resolver ( 9 ) is formed in three parts and a Resolverstator ( 15 ) and a two-part Resolverkranz ( 16 ). Internal combustion engine ( 1 ) according to claim 5, characterized in that the Resolverkranz ( 16 ) on the rotor ( 7 ) or on the torque converter ( 5 ) is arranged rotationally fixed. Internal combustion engine ( 1 ) according to one of the preceding claims, characterized in that the control unit ( 10 ) in the overlap area of the starter generator ( 2 ) outside the gearbox ( 14 ) Is arranged on selbigem. Internal combustion engine ( 1 ) according to one of the preceding claims, characterized in that a concealed and direct contacting of the electrical components of the starter generator ( 2 ) through the transmission housing ( 14 ) through the control unit ( 10 ) he follows.

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