Hybrid powertrain

• US 20040204286A1
• Filed: 04/14/2004
• Published: 10/14/2004
• Est. Priority Date: 10/21/1997
• Status: Abandoned Application

• Current Assignee: Stridsberg Powertrain AB
• Original Assignee: Stridsberg Innovation AB
• Inventors: Stridsberg, Lennart
• Application Number:
  US10/823,623
• Publication Number:
  US 20040204286A1
• Time in Patent Office: Days
• US Class Current: 477/14
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/387 Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• CPC Class Codes: B60K 6/405 Housings
• CPC Class Codes: B60K 6/442 Series-parallel switching type
• CPC Class Codes: B60K 6/46 Series type
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60K 6/52 Driving a plurality of drive axles, e.g. four-wheel drive
• CPC Class Codes: B60K 6/54 Transmission for changing ratio
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60W 10/026 of lock-up clutches
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/11 Stepped gearings
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/30 Control strategies involving selection of transmission gear ratio control of change speed gearings, together with other vehicle sub-units B60W10/10; HEV transmission gearing B60K6/36; gearings and control thereof F16H
• CPC Class Codes: B60W 2050/0031 Mathematical model of the vehicle
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: F16H 2200/0047 the gear ratios comprising five forward speeds
• CPC Class Codes: H02K 51/00 : Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts
• CPC Class Codes: Y02T 10/40 : Engine management systems
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y10S 903/903 : having energy storing means, e.g. battery, capacitor
• CPC Class Codes: Y10S 903/909 : Gearing
• CPC Class Codes: Y10S 903/91 : Orbital, e.g. planetary gears
• CPC Class Codes: Y10S 903/914 : Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means
• CPC Class Codes: Y10S 903/916 : with plurality of drive axles
• CPC Class Codes: Y10S 903/917 : with transmission for changing gear ratio
• CPC Class Codes: Y10S 903/919 : Stepped shift
• CPC Class Codes: Y10S 903/952 : Housing details

Abstract

A powertrain for a vehicle is of the combined serial and parallel hybrid type. It comprises a thermal engine (403), an electric generator/motor (409) mechanically coupled to the output shaft of the engine, a clutch (407) which can connect the two portions of the output shaft rigidly to each other, and an electric motor (401) mechanically connected to the distant portion of the output shaft. Both the generator/motor (409) and the electric motor (401) can be driven by the engine to charge an electric accumulator (404) and can receive electric power therefrom to provide extra torque to the output shaft. The output shaft of the engine drives the wheels of the vehicle through a differential. A mechanical gearbox (406) connects the output shaft to the differential and wheels (408). The use of a gearbox and two electric motors significantly improves the total performance of the powertrain. In the powertrain standard components already used for driving vehicles can be used.

Claims

1. A powertrain of a vehicle having wheels, the powertrain comprising

a thermal engine having an output shaft, which when required can be mechanically connected to at least one of the wheels for driving the at least one of the wheels,

an energy storage,

an electric motor, which is mechanically connected to the thermal engine or to the at least one wheel and which is electrically connected to the energy storage and is supplied with electric power from the energy storage for supplying or receiving mechanical power or torque when required,

wherein at least part of filtered air from an air filter of the thermal engine is made to pass in such a way that at least part of the electric motor will obtain cooling from the filtered air.

2. A powertrain according to claim 1, wherein at least part of the filter air is made to pass through an airgap of the electric motor.

3. A powertrain according to any of claims 1-2, wherein at least part of the air is made to pass along permanent magnets of the electric motor.

4. A powertrain according to claims 1-2, wherein at least part of the air is made to pass between windings of the electric motor.

5. In a vehicle having wheels and a powertrain including a thermal engine and a electric motor for selectively driving the vehicle, the electric motor being equipped for regenerative braking, a method of cooling the electric motor comprising:

passing air for supply to the thermal engine through an air filter to produce filtered air;

providing at least part of filtered air from an air filter of the thermal engine to the electric motor to provide cooling thereof.