Driving electrical machine speed controlled power combined system and device

• US 5,644,200 A
• Filed: 01/25/1996
• Issued: 07/01/1997
• Est. Priority Date: 10/03/1994
• Status: Expired due to Term

• Current Assignee: Tai-Her Yang
• Original Assignee: Tai-Her Yang
• Inventors: Yang, Tai-Her
• Primary Examiner(s): Martin, David S.
• Application Number:
  US08/591,103
• Time in Patent Office: 523 Days
• Field of Search: 318/139, 318/3-4, 318/53-64, 318/66.84, 180/65.1-65.8
• US Class Current: 318/139
• CPC Class Codes: B60K 2006/268 Electric drive motor starts the engine, i.e. used as starter motor
• CPC Class Codes: B60K 6/38 characterised by the driveline clutches shift clutches within the gearing or transmission B60K6/36 , B60K6/54
• CPC Class Codes: B60K 6/383 One-way clutches or freewheel devices
• 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 6/48 Parallel type
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y10S 903/912 Drive line clutch
• CPC Class Codes: Y10S 903/913 One way
• CPC Class Codes: Y10S 903/914 Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means
• CPC Class Codes: Y10S 903/946 Characterized by control of driveline clutch

Abstract

A combined driving structure is made up of an engine and an electrical machine. The engine is connected to the electrical machine through a clutch which allows the electrical machine to be used as a starting motor for the battery, and when the engine is started, allows the engine to drive a load and also drive the electrical machine to operate as a generator. In addition, the electrical machine can be operated as a motor at low speeds to drive the load by electrical power when the engine is stopped, and as a generator to provide regenerative braking for charging the battery, either with or without friction damping of the engine by the clutch.

Claims

1. A combined engine and electrical device, comprising:

an engine;

an electrical machine;

means including a clutch for connecting the engine and electrical machine;

means including an output shaft for connecting the engine and electrical machine to a load;

a battery connected to the electrical machine; and

means for controlling operation of the electrical machine in the following manner;

a. operating the electrical machine as a motor powered by electricity from said battery, at a speed sufficient to cause said clutch to close, thereby connecting the electrical machine to the engine and causing said electrical machine to function as a starter for said engine;

b. when the engine is running at a speed sufficient to cause said clutch to close and said engine is driving the load, operating the electrical machine to drive the load together with the engine; and

c. operating the electrical machine as a motor powered by electricity from said battery, at a speed insufficient to cause said clutch to close in order to drive said load while the engine is stopped.

2. A device as claimed in claim 1, wherein said clutch is a two-way clutch arranged to close and connect said electrical machine to said engine upon rotation at a sufficient speed of either said electrical machine or said engine, and wherein said means for controlling said electrical machine and engine further carries out the function of causing said engine to drive said electrical machine to operate as a generator to charge said battery.

3. A device as claimed in claim 1, wherein said clutch is a two-way clutch arranged to close and connect said electrical machine to said engine upon rotation at a sufficient speed of either said electrical machine or said engine, and wherein said means for controlling said electrical machine and engine further carries out the function of operating said electrical machine as a motor while the engine is running, at a speed sufficient to cause said clutch to close and function as a friction brake for said motor.

4. A device as claimed in claim 1, wherein said clutch is a two-way clutch arranged to close and connect said electrical machine to said engine upon rotation at a sufficient speed of either said electrical machine or said engine, and wherein said means for controlling said electrical machine and engine further carries out the function of operating said electrical machine as a regenerative brake for charging said battery.

5. A device as claimed in claim 1, wherein said electrical machine is connected to said clutch by means of a gear train, and further comprising a second clutch positioned between said gear train and said output shaft.

6. A device as claimed in claim 1, further comprising a speed change mechanism connected between said clutch and said output shaft.

7. A combined engine and electrical device, comprising:

an engine;

an electrical machine;

means including a clutch for connecting the engine and electrical machine;

means including an output shaft for connecting the engine and electrical machine to a load;

a battery connected to the electrical machine; and

means for controlling operation of the electrical machine in the following manner;

a. operating the electrical machine as a motor powered by electricity from said battery, at a speed sufficient to cause said clutch to close, thereby connecting the electrical machine to the engine and causing said electrical machine to function as a starter for said engine;

b. when the engine is running at a speed sufficient to cause said clutch to close and said engine is driving the load, operating the electrical machine to drive the load together with the engine;

c. operating the electrical machine as a motor powered by electricity from said battery, at a speed insufficient to cause said clutch to dose in order to drive said load while the engine is stopped;

d. when the load is slipping at a low rate, recovering excess kinetic energy by operating said electrical machine as a generator powered by said excess kinetic energy to charge said battery and provide regenerative braking without any friction braking by the clutch; and

e. when the load is slipping at a high rate, causing the engine to drive the load and recover excess kinetic energy by driving said electrical machine as a generator to charge said battery and provide regenerative braking as said clutch closes to provide frictional damping.