Partial-powered series hybrid driving system

• US 20050161948A1
• Filed: 03/24/2005
• Published: 07/28/2005
• Est. Priority Date: 02/12/2003
• Status: Active Grant

• Current Assignee: Tai-Her Yang
• Original Assignee: Tai-Her Yang
• Inventors: Yang, Tai-Her
• Granted Patent: US 7,196,430 B2
• Time in Patent Office: Days
• US Class Current: 290/40.C
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/442 Series-parallel switching type
• CPC Class Codes: B60L 50/15 with additional electric power supply with capacitors charged by engine-driven generators B60L50/40; with batteries charged by engine-driven generators B60L50/61
• CPC Class Codes: Y02T 10/40 Engine management systems
• 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: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

The present invention, a Partial-Powered Series Hybrid Driving System which enables an engine running with high power and high speed for normal or high load driving, while the load is driven under a low-power, low-speed light loading condition, the present system specifically operates in series hybrid driving configuration to correct a drawback—low efficiency and high pollution in low-power, low-speed driving by an engine.

Claims

1. A partial powered series hybrid driving system, is related to an innovation characterized by eliminating the installation of electricity-storage-device (E.S.D.) which providing or storing electrical energy for motor driving during system operation, in contrast to traditional hybrid system, the present invention deployed the drive control unit, the first and second electrical machinery unit which carries partial power capacity rating to system'"'"'s full power capacity, an engine unit with approximate full power capacity rating to system'"'"'s full power capacity, and a clutch unit installed between the first and second electrical machinery units. The feature of present invention is:

the generator unit, the motor unit only provided for light loading condition;

during normal loading condition, the clutch unit is engaged and enable an engine running with high efficiency and high power to drive a load, moreover, in the event of low-power, low-speed light-load driving, the clutch unit is disengaged, the engine operating in better efficiency region for driving the first electrical unit to function as a generator, the electricity from the first electrical unit, under the control of drive control unit, is transferred to drive the second electrical unit which functions as a motor for load driving. The system is configured in less power demanding series hybrid operating mode for refining the drawback of low efficiency and high pollutant of engine during low power and low speed operating region;

The present partial powered series hybrid driving system only deploy starting battery for engine starting, removing the installation of main E,S.D. pack, and the generator and motor units only operates under light loading, the capacity of electrical units could be reduced;

normally, the engine offers direct load driving under high load and high speed driving, under some specific situation, such as the fail of the series drive train, the power of engine could also be transferred for light load driving. In contrast to traditional full powered series powertrain system, the present architecture only requires lighter and cheaper components and eliminating the necessity of expensive, room-occupied heavy E.S.D. The main system components are listed in below;

an engine unit 100 implemented by various types of Internal Combustion Engines (I.C.E.) in use;

utilizing different types of fuels and equipped various peripheral devices, the output shaft of I.C.E. is connected to the input rotary shaft of the first electrical unit 101; and

,

the first electrical unit 101 that comprises AC or DC, brushless or brushed rotary electric machines, functioning as a generator, or capable of being converted to a generator or a motor in terms of its function;

one end of the rotary shaft is driven by the I.C.E. unit 101, and the other end of the rotary shaft is connected to the input end of clutch unit 102;

a clutch 102 controlled manually, mechanically, pneumatically or oil-hydraulically, or controlled by an electromagnetic force, to enable (engage) or interrupt (disengage) transmission of rotary mechanical energy;

the second electrical unit 103 that comprises AC or DC, brushless or brushed rotary electric machines, functioning as a motor, or capable of being converted to a motor or a generator in terms of its function;

the input end of the rotary shaft is driven by the clutch unit 102, and the other end of the rotary shaft is connected to the load 108;

a drive control unit 104 to perform full or partial of the functions listed below;

the engage or disengage of clutch unit 102;

or to control the output status of the first electrical unit 101 functioning as a generator, or to control the rotating direction, rotational speed, torque and amperage of the second electrical unit 103 functioning as a motor;

or to control the first electrical unit 101 to function as a motor, or to control both or one of the first electrical unit 101 or second electrical unit 103 to function as motor for regenerative breaking to recharge the engine starting E.S.D. 110;

a central control unit 105 composed of solid-state or electromechanical devices, or chips, and related software for receiving the control from a manual control interface 107 to control the operation of the present partial powered series hybrid driving system, and for controlling the drive control unit 104 that drive the first electrical unit 101, the second electrical unit 103, the clutch unit 102, and I.C.E. unit 100, and controlling the feedback, monitoring, coordination and interaction among all units in the system;

a starting battery 110 comprising a conventional rechargeable battery unit intended to start the engine unit 100 or supply power to peripheral equipment;

or other type of E.S.D. such as super capacitor, the item may or may not to be installed depending on requirement;

the manual control interface 107 comprising solid-state or electromechanical devices, or chips, and related software to receive inputs for manual control in order to control the present partial powered series hybrid driving system;

a transmission unit 109 comprising any types of automatic, semi-automatic or manual transmission units and to be installed between the shaft of the engine unit 100 and the shaft of the first electrical unit 101, or between the shaft of the first electrical unit 101 and the input terminal of the clutch 102, or between the output terminal of the clutch 102 and the shaft of the second electrical unit 103, or between the shaft of the second electrical unit 103 and the load 108. The transmission unit 109 may or may not to be installed depending on requirement.

2. The partial powered series hybrid driving system, as claimed in claim 1, a load unit 108 applied to the said partial powered series hybrid driving system, is the loading installed by demand which requires power from rotary electrical machinery for operating the land, maritime, airborne vehicles or industrial equipment.

3. The partial powered series hybrid driving system, as claimed in claim 1, has the following primary functions:

output from the engine unit 100 drives the generator formed by the first electrical unit 101;

the clutch 102 is installed between the shaft of the generator formed by the first electrical unit 101 and the shaft of the motor formed by the second electrical unit 103;

the clutch 102 is not coupled when the load 108 is in a light load state;

the low-speed output from the engine unit 100 operates in high efficiency region with less power required to drive the first electrical unit 101 functioning as the generator to generate electricity;

then, with the function of D.C.U. 104, the electricity produced by the generator formed by the first electrical unit 101 and the motor formed by the second electrical unit 103 to drive the load 108, in a less power demanding status wherein the operation is performed by the series-connected drive system; and

the clutch 102 is closed and the load 108 is driven by the kinetic energy outputted from the engine unit 100.

4. The partial powered series hybrid driving system, as claimed in claim 1, has the following optional functions:

If the I.C.E. unit 100 is not equipped with starting motor, the clutch 102 is not coupled;

instead, the first electrical unit 101 functions as a motor and driven by the electricity supplied by the starting battery 110 to activate the operation of the engine unit 100;

The clutch unit 102 is disengaged (open), with the power from starting battery 110 to drive the second electrical unit 103 which functioning as motor rotating in forward direction for low-speed vehicle driving or in reverse direction for vehicle backward driving;

The clutch unit 102 is engaged (close), with the power from engine unit 100 to drive the load 108 for vehicle forward driving or backward driving;

The clutch unit 102 is disengaged, the engine unit 100 drives the first electrical unit 101 to function as a generator which then outputs electricity to recharge the starting battery set 110 or other electrically driven loads;

During the breaking operation, if the clutch unit 102 is disengaged, the second electrical unit 103, can function as a generator in order to recharge the starting battery set 110 or other electrically driven loads, or attaching an electricity-consuming load connected so as to achieve the function of regenerative breaking.

5. The partial powered series hybrid driving system, as claimed in claim 1, the shaft of engine unit 100 and the shaft of the second electrical unit 103 could be arranged in parallel configuration.

6. The partial powered series hybrid driving system, as claimed in claim 1, the spatial arrangement of each relative components could be provided flexibly depending on spatial requirement without changing the operating feature of present invention.