David P Hackett

US Patent:

6349686, Feb 26, 2002

Filed:

Aug 31, 2000

Appl. No.:

09/652172

Inventors:

Dennis D. Feucht - Morton IL
David E. Hackett - Washington IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F01L 902

US Classification:

123 9012, 123 9013, 123446, 251 3005

Abstract:

In a hydraulically actuated gas exchange valve, the initiation and termination of gas exchange is achieved with a hydraulically driven valve that functions by opening an actuation fluid passage to a high pressure inlet source and a low pressure drain, respectively. The large amount of fluid needed to actuate a gas exchange valve can result in dynamic flow forces around the hydraulically driven valve making closing of the valve with a conventional biasing spring problematic. The small size of the valve limits the size and therefore strength of the biasing springs. Likewise, the need to provide a sufficiently strong spring limits valve designs. The present invention is intended to provide superior control over the timing of gas exchange by employing a hydraulic bias in place of the conventional biasing spring. Hydraulic bias allows both a greater closing force on the valve than could be provided with a spring, and allows for greater versatility in future valve designs.

US Patent:

40476642, Sep 13, 1977

Filed:

Mar 22, 1976

Appl. No.:

5/669363

Inventors:

Stanley J. Kranc - Morton IL
Alan W. Wells - Edelstein IL
David E. Hackett - Washington IL

Assignee:

Caterpillar Tractor Co. - Peoria IL

International Classification:

B05B 128

US Classification:

239120

Abstract:

An accumulator type injection valve of simple construction and relatively large accumulator capacity has opposed inlet and outlet valves for alternately and intermittently communicating a single chamber with an inlet passage for receiving fuel from a pump and an outlet passage in further communication with an injection nozzle, the outlet valve being an inwardly opening needle valve responsive to fluid pressure within the chamber. In order to even further improve operating response of the injection valve, a dump valve relieves fluid pressure from the chamber below a preselected pressure.

US Patent:

20170016416, Jan 19, 2017

Filed:

Jul 17, 2015

Appl. No.:

14/802162

Inventors:

- Peoria IL, US
Martin Lehman - Congerville IL, US
Lifeng Wang - Dunlap IL, US
David E. Hackett - Washington IL, US
Taylor Tang - Peoria IL, US
Andrew Marrack - Peoria IL, US
Dennis H. Gibson - Chillicothe IL, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F02M 37/08
F02M 37/00

Abstract:

A fluid injection system includes a fluid injector assembly; a fluid conditioning module having an outlet port that is fluidly coupled to an inlet port of the fluid injector assembly; an injector assembly outlet conduit fluidly coupled to an outlet port of the fluid injector assembly and disposed downstream of the fluid injector assembly, the injector assembly outlet conduit defining a pressure measurement port and a flow-restricting orifice, the pressure measurement port being disposed upstream of the flow-restricting orifice along the direction of fluid flow through the fluid injector assembly; a pressure sensor fluidly coupled to the pressure measurement port; and a controller operatively coupled to the fluid conditioning module and the pressure sensor. The controller is configured to adjust a flowrate of a fluid through the injector assembly inlet conduit based on a pressure signal from the pressure sensor.

US Patent:

20140331974, Nov 13, 2014

Filed:

May 8, 2013

Appl. No.:

13/889594

Inventors:

- Peoria IL, US
Steven Tian - Bloomington IL, US
Scott Shafer - Morton IL, US
Alan Stockner - Metamora IL, US
David Hackett - Washington IL, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F02M 37/04
F02M 37/18
F02M 37/12

US Classification:

123495, 417313

Abstract:

A combustion engine system and a method of operating the combustion engine system are disclosed. The combustion engine system includes a first fuel pump operatively coupled to a first prime mover and fluidly coupled to a fuel reservoir, a first power source operatively coupled to the first prime mover, the first power source including a first controller, a third fuel pump having an inlet that is fluidly coupled to a discharge of the first fuel pump, a first filter in fluid communication with the first fuel pump, a combustion engine fluidly coupled to a discharge of the third fuel pump and operative to convert fuel from the third fuel pump into shaft power. The first controller is configured to drive the first prime mover at a substantially constant power, independent of a rate of consumption of the fuel by the combustion engine.