# US 2021/0083554 A1 · Engine-and-electric-machine assembly

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- Number: US 2021/0083554 A1
- Document ID: US20210083554A1
- Status: Published application
- Kind: A1
- Application number: 17/017,125
- Filed: 2020-09-10
- Published: 2021-03-18
- Earliest claimed: 2019-09-18
- Assignees: Jing-Jin Electric Technologies Co., Ltd.
- Applicants: Jing-Jin Electric Technologies Co., Ltd.
- Inventors: Xinliang LING; Zhicheng GUO; Yao ZHOU; Ping YU
- Web page: https://patentgrep.com/patent/US20210083554A1

## CPC

- F02N 15/006: {Assembling or mounting of starting devices}
- H02K 9/193: with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
- B60K 6/485: Motor-assist type
- F02B 63/042: {Rotating electric generators}
- H02K 5/20: with channels or ducts for flow of cooling medium
- H02K 7/003: {Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28)}
- H02K 7/006: {Structural association of a motor or generator with the drive train of a motor vehicle}
- H02K 7/075: using crankshafts or eccentrics
- H02K 7/085: {radially supporting the rotary shaft at only one end of the rotor (H02K7/086, H02K7/09 take precedence)}
- H02K 24/00: Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn
- B60K 6/24: characterised by the combustion engines
- B60K 6/26: characterised by the motors or the generators
- B60K 2001/006: {the electric motors}
- B60K 2006/268: {Electric drive motor starts the engine, i.e. used as starter motor}
- F02N 11/003: {said electric motor being also used as a drive for auxiliaries, e.g. for driving transmission pumps or fuel pumps during engine stop}
- F02N 11/04: the motors being associated with current generators
- H02K 11/21: Devices for sensing speed or position, or actuated thereby (specially adapted for machines having non-mechanical commutating devices H02K29/06, H02K29/14)
- Y02T 10/62: Hybrid vehicles
- F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An engine-and-electric-machine assembly is provided that includes an engine and an electric machine, a crankshaft being provided in the engine, the crankshaft including a main body and an extension section that extends out to the exterior of the engine, the extension section forming a rotation shaft of the electric machine, and a rotor of the electric machine being mounted on the extension section. Moreover, a terminal of the rotation shaft is connected to a coolant pump, a rotor of the coolant pump is mounted to the rotation shaft, and while the rotation shaft is rotating the rotation shaft drives the coolant pump to provide coolant to the electric machine. By connecting the rotation shaft of the electric machine to the coolant pump, the assembly enables the pump to be highly integrated into the system and reduce manufacturing cost.

## Claims

### Claim 1

An engine-and-electric-machine assembly, comprising an engine and an electric machine, a crankshaft being provided in the engine, the crankshaft comprising a main body and an extension section that extends out to the exterior of the engine, the extension section forming a rotation shaft of the electric machine, and a rotor of the electric machine being mounted on the extension section, wherein a terminal of the rotation shaft is connected to a coolant pump, a rotor of the coolant pump is mounted onto the rotation shaft, and while the rotation shaft is rotating the rotation shaft drives the coolant pump to provide coolant to the electric machine.

### Claim 2 (depends on 1)

The engine-and-electric-machine assembly according to claim 1, wherein a transition section is provided between the main body and the extension section of the crankshaft, and the rotor of the electric machine is connected to the end face of the transition section via a flange structure.

### Claim 3 (depends on 2)

The engine-and-electric-machine assembly according to claim 2, wherein the rotor of the electric machine comprises an iron-core support, a plurality of main connecting holes are provided at a middle part of the iron-core support, a plurality of secondary connecting holes are correspondingly provided at the end face of the transition section, and the main connecting holes and the secondary connecting holes are aligned and are fastened together by using bolts.

### Claim 4 (depends on 3)

The engine-and-electric-machine assembly according to claim 3, wherein a protrusion that faces the transition section is provided at the middle part of the iron-core support, and the main connecting holes are provided at the protrusion.

### Claim 5 (depends on 2)

The engine-and-electric-machine assembly according to claim 2, wherein a sleeve is provided at a middle part of the iron-core support, and the sleeve is interference-fitted to the extension section when the rotor of the electric machine is mounted on the extension section to guarantee that the sleeve is concentric with the rotation shaft.

### Claim 6 (depends on 5)

The engine-and-electric-machine assembly according to claim 5, wherein a synchro-resolver rotor is mounted onto the sleeve, or a synchro-resolver rotor is mounted onto the extension section.

### Claim 7 (depends on 5)

The engine-and-electric-machine assembly according to claim 5, wherein the extension section is provided with a plurality of stepped sections whose diameters sequentially and gradually decrease from a position of the extension section that is connected to the transition section to a terminal of the extension section, the sleeve is interference-fitted to a first stepped section of the stepped sections, the rotor of the coolant pump is mounted to a last one stepped section, and an auxiliary bearing is mounted to one of the other stepped sections to support the rotation shaft.

### Claim 8 (depends on 7)

The engine-and-electric-machine assembly according to claim 7, wherein the rotor of the coolant pump and a fourth stepped section are connected by a key or a spline, or are connected by interference fitting.

### Claim 9 (depends on 2)

The engine-and-electric-machine assembly according to claim 2, wherein a sleeve is provided at a middle part of the iron-core support, and the sleeve is transition-fitted or clearance-fitted to the extension section when the rotor of the electric machine is mounted on the extension section.

### Claim 10 (depends on 2)

The engine-and-electric-machine assembly according to claim 2, wherein the transition section comprises a main body and a flange, the flange faces the rotor of the electric machine, a connecting neck is provided between the main body and the flange, and a diameter of the connecting neck is less than the diameter of the main body and the diameter of the flange.