Baojun A Si

US Patent:

8075435, Dec 13, 2011

Filed:

Aug 22, 2008

Appl. No.:

12/196970

Inventors:

Baojun Si - Dunlap IL, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F16H 3/72

US Classification:

475 5

Abstract:

An improved dual mode EPPV transmission hybrid electric drive system uses a combination of power sources including an internal combustion engine, a first electric motor, and a second electric motor, and provides more efficient operation and compact installation. The improved dual mode EPPV transmission hybrid electric drive system includes a first planetary gear set including a first sun gear linked to a first ring gear via a pinion on a first carrier, and a second planetary gear set including a second sun gear linked to a second ring gear via a pinion on a second carrier, wherein the various elements of the planetary gear sets are configured to allow a dual mode synchronous shift operation. The system includes a first clutch and a second clutch, both of which may be dry clutches, for changing the mode of the transmission from a high mode to a low mode and vice versa.

US Patent:

8317646, Nov 27, 2012

Filed:

Jun 23, 2010

Appl. No.:

12/821372

Inventors:

Baojun Si - Dunlap IL, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F16H 3/72
F16H 37/06
F16H 3/44

US Classification:

475 5, 475286

Abstract:

A multi-mode hybrid drive train offers selective operation in any one of series, parallel, and power split modes. The multi-mode hybrid drive train includes two planetary gear sets and a collection of specifically placed brakes and clutches relative to those gear sets. The first planetary gear train includes a power input for receiving power from a primary rotational power source, as well as a first sun gear, first carrier and first ring gear. The second planetary gear train similarly includes a power input as well as a second sun gear, a second carrier connected to a final drive, and a second ring gear. A first motor is linked to the first sun gear and a second motor is linked to the second sun gear such that selective activation of the clutches, brakes, and motors places the multi-mode hybrid drive train in a selected mode of operation.

US Patent:

8348804, Jan 8, 2013

Filed:

Jan 18, 2008

Appl. No.:

12/010075

Inventors:

William Henry Lane - Chillicothe IL, US
Barry Mei - Dunlap IL, US
Michael John Barngrover - Peoria IL, US
Baojun Peter Si - Dunlap IL, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

B60K 1/02

US Classification:

477 3, 180 6529

Abstract:

A power train is provided having a power source for generating a power output. The power train also has a power storage device for storing and distributing power. The power train further has a controller configured to cause the distribution of power from the power storage device for assisting the power source when the rate of fuel entering the power source is above a threshold fuel rate. The threshold fuel rate is a fuel rate at which, assisting the power source increases the efficiency of the power train.

US Patent:

8491431, Jul 23, 2013

Filed:

Nov 30, 2010

Appl. No.:

12/956280

Inventors:

Baojun Si - Dunlap IL, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F16H 3/72
F16H 3/44

US Classification:

475 5, 475284

Abstract:

A gear train may include a first planetary gear set, which may include a first sun gear, a first ring gear, and a first carrier. The gear train may also include a second planetary gear set, which may include a second sun gear, a second ring gear, and a second carrier. Additionally, the gear train may include a first clutch configured to selectively connect the first carrier with the second carrier, as well as a second clutch configured to selectively connect the first sun gear with the second sun gear. The gear train may also include a first brake configured to selectively fix the second sun gear, as well as a second brake configured to selectively fix the first carrier.

US Patent:

20100160108, Jun 24, 2010

Filed:

Dec 19, 2008

Appl. No.:

12/318008

Inventors:

Baojun Si - Dunlap IL, US
Barry Mei - Oswego IL, US
William H. Lane - Chillicothe IL, US
James Stephen Rice - Deer Creek IL, US

International Classification:

F16H 3/44

US Classification:

475280, 903911

Abstract:

A gear train includes a first planetary gear set including a first sun gear, a first ring gear, and a first carrier and a second planetary gear set including a second sun gear, a second ring gear, and second carrier. The gear train also includes a first clutch configured to selectively connect the first carrier with the second carrier and a second clutch configured to selectively connect the first sun gear with the second sun gear. The gear train also includes a first brake configured to selectively fix the first sun gear, a second brake configured to selectively fix the second sun gear, and a third brake configured to selectively fix the first carrier.

US Patent:

20120306423, Dec 6, 2012

Filed:

Jun 6, 2011

Appl. No.:

13/153845

Inventors:

Baojun SI - Dunlap IL, US
Seok-Hee Han - Dunlap IL, US
Osama Mohammad Alkhouli - Peoria IL, US

International Classification:

H02P 23/00

US Classification:

318493, 318521

Abstract:

A control system for use with a motor is disclosed. The control system may have a controller that is configured to receive a torque command for the motor and receive a rotor angular velocity signal indicative of an angular velocity of a rotor of the motor. The controller may also be configured to generate a field weakening command by adding a field weakening adjustment signal to the rotor angular velocity signal, and generate a torque voltage command and a flux voltage command based on the torque command and the field weakening command. Further, the controller may be configured to convert the torque voltage command and the flux voltage command into phase voltage commands and output the phase voltage commands.

US Patent:

20130001944, Jan 3, 2013

Filed:

Jun 30, 2011

Appl. No.:

13/173817

Inventors:

Christopher D. Hickam - Peoria IL, US
Baojun Si - Dunlap IL, US

International Classification:

F02N 11/08
B60K 6/46

US Classification:

290 31, 180 65245

Abstract:

An improved system and method for starting an engine of an electric drive machine is disclosed. The method includes supplying electric current from a first energy storage device to inductive windings of a propulsion motor. The method also includes accumulating energy in the inductive windings of the propulsion motor based on a magnetic field created when the supplied electric current flows through the inductive windings. Electrical energy is generated by regulating a first plurality of switches associated with a first inverter to cause a collapse of the accumulated energy in the inductive windings. Such electrical energy is stored in an energy storage device. A controller regulates a second plurality of switches associated with a second inverter to cause a release of the stored electrical energy. The released electrical energy is supplied to a generator to start the engine.

US Patent:

20170306589, Oct 26, 2017

Filed:

Apr 25, 2016

Appl. No.:

15/137916

Inventors:

- Peoria IL, US
Baojun Si - Dunlap IL, US
Yingying Kuai - Dunlap IL, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

E02F 9/20
E02F 9/20
E02F 3/65
E02F 9/20
E02F 3/64

Abstract:

A hybrid power train system for a tractor scraper is provided. The hybrid power train system may include a primary power source coupled to a first set of traction devices, a generator coupled to the primary power source, a first electric motor coupled to a second set of traction devices, an inverter circuit coupled to the generator and the first electric motor, an energy storage device coupled to the inverter circuit, and a controller operatively coupled to the inverter circuit. The controller may be configured to engage a first operation mode enabling electrical energy, supplied by the generator and the first electric motor, to be stored in the energy storage device, and engage a second operation mode enabling electrical energy, stored in the energy storage device, to be supplied to the first electric motor to drive the second set of traction devices.