Vehicle

Patent metadata

Field	Value
Publication number	US-2022001853-A1
Application number	US-202117341171-A
Country	US
Kind code	A1
Filing date	Jun 7, 2021
Priority date	Jul 1, 2020
Publication date	Jan 6, 2022
Grant date	—

Abstract

Provided is a vehicle capable of suppressing vibration of a drive unit having an engine and a motor to be small and having high vehicle motion performance. The drive unit for travel of the vehicle includes an engine and a motor. The engine is a rotary engine and has an engine output shaft and an engine housing. The motor has a motor output shaft, a rotor, and a stator that are accommodated in a motor housing. The engine housing of the engine and the motor housing of the motor are directly joined to each other. The engine output shaft and the motor output shaft are directly joined to each other. The rotor of the motor has: a main body section that generates a rotational magnetic field with the stator; and a weight section that functions as a balance weight of the engine.

First claim

1 . A vehicle, comprising:
a drive unit that is a drive source for travel of the vehicle and includes an engine and a motor arranged adjacent to each other, wherein the engine includes:
an engine output shaft that outputs drive power; and
an engine housing that constitutes an outer shell of the engine,
the motor includes:
a rotor and a stator;
a motor output shaft that is joined to the rotor and outputs drive power; and
a motor housing that constitutes an outer shell of the motor,
the engine housing and the motor housing are integrally formed or are joined to each other, the engine output shaft and the motor output shaft are integrally formed or are joined to each other in a manner to rotate coaxially and synchronously, and the rotor of the motor includes:
a main body section that generates a rotational magnetic field with the stator; and
a weight section that functions as a balance weight of the engine.

2 . The vehicle according to claim 1 , wherein
the engine housing and the motor housing are joined to each other in a state where an end surface on the motor housing side of the engine housing and an end surface on the engine housing side of the motor housing abut each other, and in an adjacent direction of the engine and the motor, a part of the weight section in the rotor is in a state of entering the engine housing side from an abutment surface between the engine housing and the motor housing.

3 . The vehicle according to claim 2 , wherein
when a direction that is orthogonal to an extending direction of the motor output shaft is set as a radial direction, the weight section includes:
an intermediate section that extends obliquely from the motor output shaft side and an opposite side of the engine housing toward an outer side in the radial direction and the engine housing side; and
an outer edge section that continues from the intermediate section and extends outward in the radial direction in the case where said weight section of the rotor is seen in a cross section including an axis of the motor output shaft.

4 . The vehicle according to claim 3 , wherein the outer edge section of the weight section is provided such that an outer circumferential surface of the outer edge section is located on the outer side in the radial direction from an outer circumferential surface of the main body section.

5 . The vehicle according to claim 4 , wherein the outer edge section of the weight section is provided such that the outer circumferential surface of said outer edge section is located on the outer side in the radial direction from an inner circumferential surface of the stator.

6 . The vehicle according to claim 5 , wherein
the engine further includes a unit-end balance weight that is joined to a portion on an opposite side from a side where the motor adjoins in the engine output shaft, and the weight section is provided to have a larger diameter than the unit-end balance weight.

7 . The vehicle according to claim 6 , wherein the weight section is provided such that a rotation phase thereof is a substantially reverse phase from that of the unit-end balance weight.

8 . The vehicle according to claim 7 , wherein when the weight section is seen from one side in an axial direction of the motor output shaft, the weight section has a fan shape.

9 . The vehicle according to claim 8 , wherein
the engine output shaft and the motor output shaft are directly joined to each other.

10 . The vehicle according to claim 1 , wherein the engine is a rotary engine having a rotary piston.

11 . The vehicle according to claim 10 , wherein
the drive unit includes a plurality of the rotary engines, the engine housing includes a cylindrical shape and accommodates a plurality of the rotary pistons, the motor housing includes a cylindrical shape and accommodates the rotor and the stator, and the engine housing and the motor housing are directly joined to each other by fasteners.

12 . The vehicle according to claim 1 , wherein
when a direction that is orthogonal to an extending direction of the motor output shaft is set as a radial direction, the weight section includes:
an intermediate section that extends obliquely from the motor output shaft side and an opposite side of the engine housing toward an outer side in the radial direction and the engine housing side; and
an outer edge section that continues from the intermediate section and extends outward in the radial direction in the case where said weight section of the rotor is seen in a cross section including an axis of the motor output shaft.

13 . The vehicle according to claim 1 , wherein when the weight section is seen from one side in an axial direction of the motor output shaft, the weight section includes a fan shape.

14 . The vehicle according to claim 1 , wherein the engine output shaft and the motor output shaft are directly joined to each other.

15 . The vehicle according to claim 12 , wherein the outer edge section of the weight section is provided such that an outer circumferential surface of the outer edge section is located on the outer side in the radial direction from an outer circumferential surface of the main body section.

16 . The vehicle according to claim 13 , wherein the engine output shaft and the motor output shaft are directly joined to each other.

17 . The vehicle according to claim 15 , wherein the outer edge section of the weight section is provided such that the outer circumferential surface of said outer edge section is located on the outer side in the radial direction from an inner circumferential surface of the stator.

18 . The vehicle according to claim 15 , wherein
the engine further includes a unit-end balance weight that is joined to a portion on an opposite side from a side where the motor adjoins in the engine output shaft, and the weight section is provided to have a larger diameter than the unit-end balance weight.

19 . The vehicle according to claim 18 , wherein the weight section is provided such that a rotation phase thereof is a substantially reverse phase from that of the unit-end balance weight.

20 . The vehicle according to claim 1 , wherein
the motor is arranged adjacent to a rear side of the engine, and the engine and the motor have a direct-coupling structure to share an output shaft.

Assignees

• Mazda Motor

Inventors

• Tanaka Hiroshi
• Ueno Satoshi
• Kinoshita Hiroshi
• Yonemori Kei

Classifications

• Y02T10/62

  Hybrid vehicles · CPC title

• H02K5/24

  specially adapted for suppression or reduction of noise or vibrations · CPC title

• B60K6/26 Primary

  characterised by the motors or the generators · CPC title

• H02K5/04

  Casings or enclosures characterised by the shape, form or construction thereof · CPC title

• H02K7/003

  Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28) · CPC title