Alexander Lee Roberts

US Patent:

7080625, Jul 25, 2006

Filed:

May 21, 2004

Appl. No.:

10/851000

Inventors:

William C. Albertson - Clinton Township MI, US
Alexander J. Roberts - Rochester MI, US
Thomas E. Bolander - Flint MI, US
Michael A. Kropinski - Troy MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02D 13/06

US Classification:

123325, 123198 F, 123481

Abstract:

An engine control system for controlling engine operation in activated and deactivated modes in a displacement on demand engine system includes an engine control that generates a load control signal based on one of an activation and a deactivation signal. An accessory control manipulates operation of an accessory driven by the engine based on the load control signal.

US Patent:

7100565, Sep 5, 2006

Filed:

Feb 5, 2004

Appl. No.:

10/772845

Inventors:

Jeffrey J. Allen - Brighton MI, US
Alexander J. Roberts - Rochester MI, US
Thomas E. Bolander - Flint MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02D 7/00
F02D 41/04

US Classification:

123198F, 123399, 123481

Abstract:

A throttling and intake control system transitions between activated and deactivated modes in a displacement on demand engine. The throttling and intake control system includes an intake manifold pressure sensor that generates an intake manifold pressure signal and a controller that calculates a pressure window based on the manifold pressure and an engine speed signal. The controller transitions the engine from the activated mode to the deactivated mode when the measured intake manifold pressure is greater than the maximum limit of the pressure window. The controller transitions the engine from the deactivated mode to the activated mode when the intake manifold pressure is less than the lower limit of the pressure window.

US Patent:

7308959, Dec 18, 2007

Filed:

Sep 15, 2003

Appl. No.:

10/662847

Inventors:

Alexander J. Roberts - Rochester MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B60K 6/02

US Classification:

180 653, 180 652, 903941

Abstract:

A regenerative braking system for a vehicle includes a displacement on demand (DOD) engine having cylinders, a battery, and an electric machine having motor and generator modes. The electric machine is selectively driven by a wheel of the vehicle. A controller detects a braking condition of the vehicle and deactivates at least one of the cylinders in response to the braking condition. The controller operates the electric machine in the generator mode during the braking condition to charge the battery.

US Patent:

8056516, Nov 15, 2011

Filed:

Jul 24, 2008

Appl. No.:

12/178989

Inventors:

Kenneth J. Cinpinski - Ray MI, US
Donovan L. Dibble - Utica MI, US
Alexander J. Roberts - Commerce Township MI, US
Vimesh M. Patel - Novi MI, US

International Classification:

F01L 1/34

US Classification:

123 9015, 123 9017, 464160

Abstract:

A system for controlling a variable valve lift system of an engine comprises a delay module that estimates a total delay based on at least one of a measured and an estimated delay of the variable valve lift system. A variable valve control module commands one of a first transition from a variable valve low-lift profile to a variable valve high-lift profile and a second transition from a variable valve high-lift profile to a variable valve low-lift profile based on the total delay.

US Patent:

8086388, Dec 27, 2011

Filed:

Jun 23, 2008

Appl. No.:

12/143903

Inventors:

Kenneth J. Cinpinski - Ray MI, US
Donovan L. Dibble - Utica MI, US
Alexander J. Roberts - Commerce Township MI, US
Vijay Ramappan - Novi MI, US

International Classification:

B60T 7/12

US Classification:

701103, 123 9017

Abstract:

A camshaft phasor control system for an engine includes a first camshaft position sensor that generates a first camshaft position signal based on a position of a first camshaft. A first summer generates a first error signal based on the first camshaft position signal and a first commanded position signal. A control module generates a raw duty cycle based on the first error signal. A second summer generates a modified duty cycle based on the raw duty cycle and a modifier. The control module generates the modifier based on the first error signal and speed of the first camshaft relative to a second camshaft.

US Patent:

8428809, Apr 23, 2013

Filed:

Feb 11, 2008

Appl. No.:

12/028959

Inventors:

Alexander J. Roberts - Commerce Township MI, US
Kenneth J. Cinpinski - Ray MI, US
Donovan L. Dibble - Utica MI, US

International Classification:

G01M 17/00
G01M 15/00
B60T 7/12
G06F 19/00
F01L 1/34
F02M 35/00
F02M 69/54
F02B 37/12

US Classification:

701 292, 701 291, 701109, 701114, 123 9015, 12318453, 123463, 7311432, 7311433, 7311437

Abstract:

A method of valve lift failure detection may include determining first and second intake air pressures in an engine having intake valve lifters that selectively operate intake valves in first and second lift modes. The first intake air pressure may correspond to an intake stroke of a first piston of the engine when the engine is commanded to operate in the first lift mode and the second intake air pressure may correspond to an intake stroke of a second piston of the engine when the engine is commanded to operate in the first lift mode. The method may further include determining a difference between the first and second intake air pressures and diagnosing an intake valve lifter failure when the difference exceeds a predetermined limit.

US Patent:

20050279320, Dec 22, 2005

Filed:

Jun 18, 2004

Appl. No.:

10/872267

Inventors:

Alexander Roberts - Rochester MI, US
Jeffrey Allen - Kelkheim-Fischbach, DE
Thomas Bolander - Flint MI, US

International Classification:

F02D017/02

US Classification:

12319800F

Abstract:

A cylinder deactivation (DOD™) engine is provided with features and operated in a manner to increase the cylinder air charges of the operating cylinders in DOD operation with the DOD cylinders cut out. The increased charge air allows higher loading of the STD cylinders extending the range of torque loads and speeds for DOD engine operation without requiring switchover to STD operation wherein all cylinders are in operation. The result is increased overall efficiency by extended operation of the engine in a DOD mode wherein the operating cylinders have higher levels of volumetric efficiency and reduced fuel consumption.