Peter T Rauznitz

US Patent:

6837221, Jan 4, 2005

Filed:

Jun 26, 2002

Appl. No.:

10/179017

Inventors:

John D. Crofts - Edinburgh IN, US
Jung-min C. Sung - Columbus IN, US
Peter Rauznitz - Columbus IN, US

Assignee:

Cummins Inc. - Columbus IN

International Classification:

F02M 3704

US Classification:

123467, 123496

Abstract:

An injector is provided which includes a nozzle valve element, a control volume, and an injection control valve including a control valve member for controlling fuel flow from the control volume so as to control nozzle valve movement. Importantly, the injector includes a nozzle valve lift detecting device for detecting nozzle valve lift and providing a nozzle valve element lift feedback signal. Feedback signals are improved and control valve member oscillations are minimized by positioning a valve seat associated with the control valve member a spaced distance from the control volume, positioning a drain orifice such that the nozzle valve element restricts flow through a drain circuit when in an open position and extending the control valve member from the valve seat to the control volume to form an end wall of the control volume.

US Patent:

6850833, Feb 1, 2005

Filed:

Nov 3, 2003

Appl. No.:

10/700104

Inventors:

Yue Yun Wang - Columbus IN, US
Peter Rauznitz - Columbus IN, US
Martin T. Brooks - Columbus IN, US

Assignee:

Cummins, Inc. - Columbus IN

International Classification:

F02M 2507
G01M 1900
G01P 500

US Classification:

701108, 731182, 12356812, 60602, 606052, 701114, 701115

Abstract:

A system for diagnosing operation of a delta pressure sensor used with an internal combustion engine comprises an intake manifold and an exhaust manifold each operatively coupled to the engine, an EGR conduit fluidly coupled between the intake and exhaust manifolds, and a flow restriction mechanism disposed in-line with the EGR conduit, wherein the delta pressure sensor produces a delta pressure signal indicative of a pressure differential across the flow restriction mechanism. A control computer compares the delta pressure signal to a modeled delta pressure value modeled as a function of at least engine speed and one of engine load and engine output torque percentage, and diagnoses a fault state of the delta pressure sensor based on the comparison.

US Patent:

6912998, Jul 5, 2005

Filed:

Mar 10, 2004

Appl. No.:

10/796068

Inventors:

Peter Rauznitz - Columbus IN, US
John D. Crofts - Edinburgh IN, US
Lester L. Peters - Columbus IN, US

Assignee:

Cummins Inc. - Columbus IN

International Classification:

F02M051/00

US Classification:

123490, 123496, 701104, 31031601, 2391022

Abstract:

A piezoelectric fuel injection system and a method of controlling same, the system including a piezoelectric fuel injector having a piezoelectric element, a power source adapted to provide power to the piezoelectric element to actuate the piezoelectric fuel injector, and a controller adapted to cyclically modulate power provide to the piezoelectric element by the power source during at least a portion of the injection event. The controller cyclically modulates the power between a predetermined first voltage and a predetermined second voltage that is less than the first voltage to control the rate of fuel injected by the piezoelectric fuel injector during the portion of the injection.

US Patent:

6978770, Dec 27, 2005

Filed:

May 12, 2004

Appl. No.:

10/843357

Inventors:

Peter Rauznitz - Columbus IN, US
Lester L. Peters - Columbus IN, US
John D. Crofts - Edinburgh IN, US
William D. Meyer - Columbus IN, US

Assignee:

Cummins Inc. - Columbus IN

International Classification:

F02M037/04

US Classification:

123498, 123496

Abstract:

A piezoelectric fuel injection system and a method of controlling same are provided which include a piezoelectric fuel injector having a piezoelectric element, a power source adapted to provide power to the piezoelectric element to actuate the piezoelectric fuel injector, and a controller adapted to charge the piezoelectric element to an initial voltage to begin said injection event, to decrease the voltage from the initial voltage to an intermediate voltage, and to increase the voltage from the intermediate voltage to a primary voltage to thereby control the injection rate shape. The initial voltage level is at least approximately equal to said primary voltage level and preferably approximately equal to a maximum voltage rating. The initial voltage duration, the intermediate voltage duration and the magnitude of the intermediate voltage can be changed or varied to modify the injection or rate shape.

US Patent:

7140353, Nov 28, 2006

Filed:

Jun 28, 2005

Appl. No.:

11/167556

Inventors:

Peter Rauznitz - Columbus IN, US
David L. Buchanan - Westport IN, US
Lester L. Peters - Columbus IN, US

Assignee:

Cummins Inc. - Columbus IN

International Classification:

F02M 51/06
B05B 3/00
F02M 47/02

US Classification:

123446, 2391022, 2395332

Abstract:

An piezoelectric actuated injector is provided which includes a nozzle valve element, a control volume, and an injection control valve including a control valve member for controlling fuel flow from the control volume so as to control nozzle valve movement. Importantly, the injector includes a preload chamber positioned along an injection control valve member for receiving high pressure fuel. The high pressure fuel acts on the injection control valve member to apply a preload force to supply a preload force to the stack of piezoelectric elements thereby ensuring more accurate control over fuel injection timing and metering.

US Patent:

7877988, Feb 1, 2011

Filed:

Jan 2, 2008

Appl. No.:

11/968579

Inventors:

Gregory H. Henderson - Columbus IN, US
Peter Rauznitz - Columbus IN, US
Greg Emerick - Columbus IN, US
Joseph M. Brault - Columbus IN, US

Assignee:

Cummins IP, Inc. - Minneapolis MN

International Classification:

F01N 3/00

US Classification:

60295, 60274, 60286, 60297, 60311

Abstract:

An apparatus, system, and method are disclosed for controlling soot filter regeneration. The apparatus includes an average temperature module configured to determine an average bed temperature, and a max temperature module configured to calculate a target maximum bed temperature based upon the average bed temperature. The system includes a vehicle having a motor, an exhaust system, an after treatment system, an after treatment controller module, and the apparatus. The method includes determining an average bed temperature, and calculating a target maximum bed temperature based upon the average bed temperature.

US Patent:

56344465, Jun 3, 1997

Filed:

Sep 1, 1995

Appl. No.:

8/522574

Inventors:

Peter Rauznitz - Columbus IN
Mary L. Till - Indianapolis IN
Jimmie J. Trueblood - Columbus IN
Charles E. Goode - Columbus IN

Assignee:

Cummins Engine Company, Inc. - Columbus IN

International Classification:

F02D 1304
B60K 3102
B60K 4120

US Classification:

123322

Abstract:

A cruise control based retarder control. If the vehicle speed exceeds the cruise control set speed, the cruise control system continuously checks the vehicle speed and acceleration order to determine the optimum auxiliary brake level based upon the amount of overspeed and acceleration. The cruise control system allows the vehicle driver to select which auxiliary brakes will be applied to slow down the vehicle to the desired speed by means of the normal cabin brake switches, limited by the determined optimum brake level. The driver can therefore control which auxiliary brakes are applied, however the application of these brakes is controlled by the cruise control system without the need to exit cruise control mode. Operation of the auxiliary brakes by the cruise control system will normally reset in increased fuel economy over prior art systems which require exiting of the cruise control system, manual activation of the auxiliary brakes and resumption of the cruise control system.

US Patent:

62569929, Jul 10, 2001

Filed:

May 27, 1998

Appl. No.:

9/085202

Inventors:

Spencer C. Lewis - Mt. Pleasant SC
Peter Rauznitz - Columbus IN
Mark W. Pyclik - Bloomington IN
Joseph F. Mohos - Columbus IN
W. Barry Bryan - Franklin IN

Assignee:

Cummins Engine Company, Inc. - Columbus IN

International Classification:

F02D 2300

US Classification:

60603

Abstract:

The present invention relates to a system and method for managing the operation of a turbocharger and is responsible for controlling the turbocharger to cause a desired air mass flow to be provided to the engine and for protecting the turbocharger from excessive shaft speed and excessive turbine inlet temperature. The protection modes have higher priority than the performance control. First, turbocharger shaft speed is checked against a programmable limit, and the turbocharger is adjusted to bring the speed under control if its speed exceeds this limit. If the speed is not above the limit, the turbine inlet temperature is checked against a second programmable limit. If the turbocharger inlet temperature is above the predetermined limit, the turbocharger is adjusted to bring the inlet temperature under control. If, after either of these adjustments are made, the predetermined limits are still exceeded by the turbocharger, then the system invokes a derating of the fueling to the engine in order to protect the turbocharger. If none of the limits have been exceeded, then the system operates the turbocharger to provide the desired air mass flow to the engine in order to maximize engine performance.