Bryan W Snyder

US Patent:

7128035, Oct 31, 2006

Filed:

Mar 10, 2005

Appl. No.:

11/076742

Inventors:

David R. Lancaster - Troy MI, US
Mark G. Kosowski - Rochester Hills MI, US
Mark A. Theobald - Bloomfield Hills MI, US
Bryan R. Snyder - Waterford MI, US
John P. Miller - Northville MI, US
David J. Freiman - Ann Arbor MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02N 17/00

US Classification:

12317818

Abstract:

An internal combustion engine's start-up torsional disturbances are reduced by drawing down intake manifold pressure prior to engine cranking. In a preferred arrangement, a secondary air injection reaction pump is adapted for evacuating the intake manifold to effect the desired draw down of the intake manifold pressure.

US Patent:

7463968, Dec 9, 2008

Filed:

May 3, 2007

Appl. No.:

11/743969

Inventors:

Bryan R. Snyder - Waterford MI, US

Assignee:

GL Global Technology Operations, Inc. - Detroit MI

International Classification:

G06F 17/00
B60W 10/02
F02N 17/00
F02M 51/00
G05D 1/00

US Classification:

701112, 1231794, 123198 DB, 477 6, 701104

Abstract:

A control scheme is provided for stopping an internal combustion engine of a hybrid powertrain during ongoing vehicle operation. The method, executed as program code in an article of manufacture comprises the following steps in the sequence set forth. First, engine operation is controlled to stop firing the engine. A damper clutch is controlled to lock rotation of the engine and the electro-mechanical transmission. Torque outputs from the first and second electrical machines are then selectively controlled to reduce engine speed. Torque outputs from the first and second electrical machines are then selectively controlled to stop rotation of the engine substantially near a predetermined crank position.

US Patent:

7529637, May 5, 2009

Filed:

Jan 31, 2007

Appl. No.:

11/669522

Inventors:

Bryan R. Snyder - Waterford MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

G01L 7/00
G01F 17/00

US Classification:

702138, 123435, 180165, 701103, 702 55

Abstract:

An article of manufacture and method are provided to determine pressure in an unfired cylinder of an internal combustion engine. The cylinder comprises a variable volume combustion chamber defined by a piston reciprocating within a cylinder between top-dead center and bottom-dead center points and an intake valve and an exhaust valve controlled during repetitive, sequential exhaust, intake, compression and expansion strokes of said piston. The code is executed to determine volume of the combustion chamber, and determine positions of the intake and exhaust valves. A parametric value for cylinder pressure is determined at each valve transition. Cylinder pressure is estimated based upon the combustion chamber volume, positions of the intake and exhaust valves, and the cylinder pressure at the most recently occurring valve transition.

US Patent:

7556120, Jul 7, 2009

Filed:

May 25, 2006

Appl. No.:

11/440499

Inventors:

Bryan R. Snyder - Waterford MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

B60K 17/356

US Classification:

180305, 60327

Abstract:

The invention comprises a method, an article, and a control system for controlling a powertrain having a main and an auxiliary hydraulic pump, with each pump operative to supply hydraulic fluid to a hydraulic circuit of the transmission. It includes determining a main pressure and a desired main pressure, and controlling the auxiliary hydraulic pump. Determining a main pressure in the hydraulic circuit comprises estimating hydraulic pressure. The auxiliary pump is controlled to an operating speed. Control of flow from the auxiliary and main pumps can comprise an exclusive ‘either-or’ flow, or a blended flow.

US Patent:

7556578, Jul 7, 2009

Filed:

Oct 26, 2006

Appl. No.:

11/553064

Inventors:

Aniket Kothari - Southfield MI, US
Bryan R. Snyder - Waterford MI, US
Michael D. Foster - Carmel IN, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

F16H 3/72

US Classification:

475 5

Abstract:

A method and an apparatus for controlling an electro-mechanical transmission selectively operative in a plurality of fixed gear modes and continuously variable modes is provided. The exemplary transmission comprises first and second electrical machines and a hydraulic circuit comprising a plurality of pressure control devices and flow management valves. The method comprises monitoring an operating temperature of the electrical machines. A cooling flow rate in the hydraulic circuit effective to reduce the operating temperature of the electrical machines is determined. Availability of active cooling for each of the electrical machines is determined. Hydraulic flow in the hydraulic circuit is selectively controlled.

US Patent:

7835841, Nov 16, 2010

Filed:

May 3, 2007

Appl. No.:

11/743945

Inventors:

Bryan R. Snyder - Waterford MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

B60K 6/00

US Classification:

701 51, 180 65265

Abstract:

A control system for a hybrid powertrain which determines engine crank angle position based upon signal inputs from electric machines of the powertrain is provided. The hybrid powertrain comprises an internal combustion engine and electric machines and an electro-mechanical transmission selectively operative to transmit torque therebetween. The electric machines are rotatably fixedly coupled to the internal combustion engine via a transmission input shaft. Control modules are adapted to execute a control scheme to determine engine crank angle position. The control scheme comprises code to determine an input shaft angle based upon rotational positions of the electric machines. An offset angle of the input shaft and an angular twist between the engine and the transmission are determined. An engine crank angle offset is determined based upon the offset angle and the angular twist of the input shaft.

US Patent:

7991519, Aug 2, 2011

Filed:

May 14, 2007

Appl. No.:

11/748156

Inventors:

Bryan R. Snyder - Waterford MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

B60W 10/06
B60W 10/08
G06F 17/00
B60W 10/04

US Classification:

701 22, 701 51, 701 54, 701 55, 701 67, 701 99

Abstract:

There is provided a method and apparatus to determine operating conditions for a powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween. The method comprises determining a torque output and an operating cost for operating the first and second electrical machines of the hybrid transmission effective to meet an operator torque request when the engine is operating in an engine-off operating state. Determining the torque output for operating the first and second electrical machines comprises executing a predetermined system equation effective to determine motor torque outputs from each of the first and second electrical machines based upon the selected parametric value for the input torque and the operator torque request.

US Patent:

7996145, Aug 9, 2011

Filed:

May 3, 2007

Appl. No.:

11/743919

Inventors:

Bryan R. Snyder - Waterford MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

G06F 9/00
H02K 23/52

US Classification:

701104, 701105, 701113, 290 18, 903905, 1231795

Abstract:

There is provided a control scheme for restarting an internal combustion engine of a hybrid powertrain during ongoing vehicle operation. The method includes generating a torque output from an electrical machine to rotate the engine, and determining an engine crank torque. The torque output from the electrical machine is selectively controlled based upon the engine crank torque. The engine is fired when rotational speed of the engine exceeds a threshold. An engine torque simulation model accurately determines engine compression pressures in real-time to accommodate changes in engine operating conditions, based upon present engine operating conditions.