Roger J Rademacher

US Patent:

7881846, Feb 1, 2011

Filed:

Jan 31, 2006

Appl. No.:

11/343685

Inventors:

Paul E. Reinke - Rochester Hills MI, US
Roger Joseph Rademacher - Holt MI, US

International Classification:

G06F 7/00
G06F 17/00

US Classification:

701 54, 701 69, 123350, 477110

Abstract:

A driveline clunk control system for a vehicle having an engine that drives a driveline through a transmission includes a transmission output shaft speed (TOSS) sensor that generates a TOSS signal and a first module that receives the TOSS signal and that determines a secondary parameter (ΔTOSS) based on the TOSS signal. A second module detects onset of a clunk condition based on the ΔTOSS and a third module regulates operation of the vehicle to inhibit the clunk condition when the onset of the clunk condition is detected.

US Patent:

8116932, Feb 14, 2012

Filed:

Feb 25, 2009

Appl. No.:

12/392411

Inventors:

Steven A. Tarnowsky - West Bloomfield MI, US
Michael E. Polom - Oakland Township MI, US
Roger Joseph Rademacher - Holt MI, US
Donald D. Crites - Washington MI, US
Keith D. Van Maanen - Birmingham MI, US
Brian M Porto - Novi MI, US
Michael Chernyak - Farmington Hills MI, US

International Classification:

G01M 17/00
F04B 49/02

US Classification:

701 29, 701 31, 701 66, 417 24

Abstract:

A system includes an auxiliary pump that provides pressurized fluid to a transmission during an engine auto stop/start event. A mechanical pump provides pressurized fluid to a transmission during engine operation after the engine auto stop/start event. An auxiliary pump diagnostic system includes a slip determination module that determines slip of a torque converter based on an engine speed and a transmission input speed. A fault determination module diagnoses a fault in the auxiliary pump in response to an engine auto start and based on the slip of the torque converter.

US Patent:

20120101697, Apr 26, 2012

Filed:

Oct 20, 2010

Appl. No.:

12/908180

Inventors:

Craig J. Hawkins - Howell MI, US
Adam J. Heisel - Garden City MI, US
Christopher E. Whitney - Commerce MI, US
Matthew D. Whitton - Howell MI, US
Roger Joseph Rademacher - Holt MI, US
Keith D. Van Maanen - Birmingham MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - Detroit MI

International Classification:

F16H 59/14

US Classification:

701 51

Abstract:

A method of executing a downshift in a fixed-gear powertrain having an input node and an output node related by a starting speed ratio before the downshift and a finishing speed ratio after is provided. The downshift includes a torque phase and an inertia phase. A starting output torque is calculated as a function of a starting driver request. An electric machine applies a starting regenerative input torque which is calculated as substantially equal to the starting output torque divided by the starting speed ratio. A finishing output torque is calculated as a function of a finishing driver request. The electric machine applies a finishing regenerative input torque which is calculated as substantially equal to the finishing output torque divided by the finishing speed ratio.

US Patent:

54621909, Oct 31, 1995

Filed:

Jan 23, 1995

Appl. No.:

8/376251

Inventors:

Shelly L. Lienhart - Holt MI
Roger J. Rademacher - Holt MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B65D 5516

US Classification:

220375

Abstract:

A fuel cap tether apparatus on a motor vehicle having a body panel with an access opening or port therein, a fuel tube including a neck behind the access opening, a fuel door mounted on the vehicle for pivotal movement between open and closed positions exposing and concealing, respectively, the access opening, and a fuel cap closing the fuel tube neck and removable therefrom in response to twisting of the fuel cap relative to the fuel tube neck. The fuel cap tether apparatus includes a string-like flexible tether having a first end rigidly connected to the vehicle and a second end connected to the fuel cap such that the latter is rotatable relative to the tether and a hook on the fuel door disposed laterally outboard of the body panel surrounding the fuel tube access opening when the fuel door is in its open position. After the fuel cap is removed, the tether is hung in the hook and the fuel cap released. Under the influence of gravity, the fuel cap is suspended by the tether vertically below the hook and correspondingly laterally outboard of the body panel.

US Patent:

20140257607, Sep 11, 2014

Filed:

Mar 5, 2013

Appl. No.:

13/785413

Inventors:

- Detroit MI, US
Roger Joseph Rademacher - Holt MI, US
Craig J. Hawkins - Howell MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

B60W 20/00

US Classification:

701 22, 903902, 180 65265

Abstract:

A vehicle includes an engine having autostart functionality, a source of fluid pressure when the engine is off, a flow control solenoid that outputs a variable clutch pressure, a transmission, an electric motor, and a controller. The transmission includes a clutch in fluid communication with the solenoid. The clutch applies via the clutch pressure to establish a first gear launch state. The motor is powered via a rechargeable energy storage system. The controller executes a method to transmit pulse width modulation (PWM) control signals to the solenoid upon detection of a set of conditions triggering the autostart event to lower clutch pressure to a first calibrated level. Restart of the engine is commanded, and the clutch pressure increases toward a second calibrated level while engine speed is increasing. The controller discontinues the PWM control signals and increases clutch pressure to line pressure when the input speed exceeds a calibrated threshold.