# US 7,607,505 B2 · Energy storage type of differential mixed power distribution system

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,607,505 B2
- Document ID: US7607505B2
- Status: Granted
- Kind: B2
- Application number: 11/202,240
- Filed: 2005-08-12
- Published: 2007-05-03
- Granted: 2009-10-27
- Earliest claimed: 2005-08-12
- Inventors: Tai-Her Yang
- Web page: https://patentgrep.com/patent/US7607505B2

## CPC

- B60K 23/0808: {for varying torque distribution between driven axles, e.g. by transfer clutch}
- B60K 6/365: with the gears having orbital motion
- B60K 6/445: Differential gearing distribution type
- B60K 6/48: Parallel type
- B60K 6/52: Driving a plurality of drive axles, e.g. four-wheel drive
- B60K 17/346: the transfer gear being a differential gear
- B60L 7/12: for vehicles propelled by DC motors
- B60L 7/14: for vehicles propelled by AC motors
- B60L 7/18: Controlling the braking effect (B60L7/12, B60L7/14, B60L7/16 take precedence)
- B60L 7/26: Controlling the braking effect
- B60L 15/2009: {for braking}
- B60L 50/16: with provision for separate direct mechanical propulsion
- B60L 50/40: using propulsion power supplied by capacitors
- B60L 50/61: by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
- B60L 2210/40: DC to AC converters
- B60L 2240/423: Torque
- B60L 2260/28: Four wheel or all wheel drive
- Y02T 10/62: Hybrid vehicles
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 10/72: Electric energy management in electromobility
- 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
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An energy storage type of differential mixed power distribution system to drive an all wheel driving carrier; a revolution output end of an internal combustion engine (or any other revolution power source) to drive the front-end load through an intermediate transmission and control interface device, and to also drive an input end of the energy storage type of differential mixed power device to output kinetics to further drive the rear-end load; and an electro-mechanical unit functioning as a generator and a motor being disposed in the energy storage type of differential mix power device to regulate the power distribution between the front-end and the rear-end loads by controlling the electro-mechanical unit to operate as a motor or as a generator.

## Claims

### Claim 1

A power distribution system for distributing revolving power to drive a transportation vehicle, comprising:
a power source for providing the revolving power;
a differential mixed power device for regulating a distribution of power between a front-end load and a rear-end load of the vehicle, and for outputting power to drive the rear-end load, the differential mixed power device including an electro-mechanical device coupled with a three-end shaft differential wheel set, wherein when the electro-mechanical device is driven by a revolutions-per-minute (RPM) difference of the front-end and rear-end loads, the electro-mechanical device functions as a generator to charge a rechargeable device and provides a passive regulation of the power distribution, and when the electro-mechanical device is powered by the rechargeable device, the electro-mechanical device functions as a motor that revolves clockwise or counter-clockwise to provide an active regulation of the power distribution;
a transmission and control interface device for transmitting the revolving power to the front-end load and the differential mixed power device;
a differential shaft, disposed between the differential mixed power device and the transmission and control interface device, and configured to output an RPM through the transmission and control interface device;
a front-end transmission device, disposed between the front-end load and the transmission and control interface device, including a conventional transmission mechanism to input revolving kinetics from the transmission and control interface device to drive the front-end load;
a drive circuit device, disposed between the electro-mechanical device and the rechargeable device, and configured to control the electro-mechanical device to function as a motor or a generator, and to control the output power to create a reverse torque at the electro-mechanical device for regulating the power distribution between the front-end and the rear-end loads, according to given control commands; and
a central controller, configured to provide control commands to the drive circuit device.

### Claim 2 (depends on 1)

The power distribution system of claim 1, wherein the front-end transmission device further includes a differential wheel set that is configured to drive a differential load via the two output ends of the differential wheel set.

### Claim 3 (depends on 1)

The power distribution system of claim 1, wherein the front-end transmission device further includes a controllable clutch for transmitting or cutting off the revolving kinetics from the transmission and control interface device.

### Claim 4 (depends on 3)

The power distribution system of claim 3, wherein the controllable clutch is one of a manual clutch, a mechanical clutch, an electromagnetic clutch, an eccentric force driven clutch, and a clutch with a one-way transmission means.

### Claim 5 (depends on 1)

The power distribution system of claim 1, further including a clutch that is disposed between the differential shaft of the differential mixed power device and a revolving kinetics output end of the transmission and control interface device, and is configured to couple or cut off revolving kinetics between the differential mixed power device and the transmission and control interface device, the clutch being one of a manual clutch, a mechanical clutch, an electromagnetic clutch, an eccentric force driven clutch, and a clutch with a one-way transmission means.

### Claim 6 (depends on 1)

The power distribution system of claim 1, further includes a brake that is disposed between a rotor and a static case of the electro-mechanical device, the brake being manipulated by one of a manual force, a mechanical force, an electromagnetic force, and a fluid force.

### Claim 7 (depends on 1)

The power distribution system of claim 1, further includes a brake that is disposed between the differential shaft and a static case of the electro-mechanical device, the brake being manipulated by one of a manual force, a mechanical force, an electromagnetic force, and a fluid force.

### Claim 8 (depends on 1)

The power distribution system of claim 1, further including:
a first clutch, disposed in the front-end transmission device, and configured to transmit or cut off the revolving kinetics from the transmission and control interface device;
a second clutch, disposed between the differential shaft of the differential mixed power device and a revolving kinetics output end of the transmission and control interface device, and configured to couple or cut off revolving kinetics between the transmission and control interface device and the differential mixed power device;
a first brake, disposed between the differential shaft and a static case of the electro-mechanical device; and
a second brake, disposed between a rotor and a static case of the electro-mechanical device.

### Claim 9 (depends on 8)

The power distribution system of claim 8, wherein the system provides at least one of the following functions through controls by the transmission and control interface device and the central controller:
(1) the rechargeable device provides power to drive the electro-mechanical device of the differential mixed power device, the electro-mechanical device functioning as a motor to drive the front-end or the rear-end load by revolving clockwise or counter-clockwise to regulate the power distribution between the front-end and the rear-end loads;
(2) when the power source provides driving power, both the first and second brakes and the second clutch are in a disengaged status; using a RPM difference between the differential shaft and another differential shaft disposed between the differential mixed power device and the rear-end load, the electro-mechanical device is driven to charge the rechargeable device; the power distribution between the front-end and the rear-end loads is regulated by controlling the reverse torque through a control of a charging amperage;
(3) with the first brake applied and the second brake released, the electro-mechanical device is driven by a power from the rechargeable device through a control from the drive circuit device;
(4) when the transportation vehicle is driving on a downward slope, with the first brake applied and the second brake released, the electro-mechanical device adapts to the differential mixed power device and functions as a generator to charge the rechargeable device or supply power for executing a brake with regenerated power;
(5) with the second clutch disengaged and the first clutch engaged, the revolving power from the power source drives the front-end loads; and
(6) with the first clutch disengaged and the first and second brakes applied, the revolving power from the power source drives the rear-end loads.

### Claim 10 (depends on 1)

The power distribution system of claim 1, wherein the differential power distribution between the front-end and the rear-end loads includes at least one of the following:
(1) power from the rechargeable device drives the electro-mechanical device to function as a motor revolving clockwise or counter-clockwise to provide an active regulation of the RPM difference, and an active regulation of the power distribution between the front-end and the rear-end loads;
(2) the electro-mechanical device, driven by the revolving power through the three-end shaft differential wheel set, functions as a generator to charge the rechargeable device, or supply power to other power driven loads; The supplied power creates a reverse torque at the electro-mechanical device, and provides differential damper at the three-end shaft differential wheel set coupled to the electromechanical device, thereby to provide passive regulation of the RPM difference between the front-end load and the rear-end load.