Rebecca A Spence

US Patent:

20120251367, Oct 4, 2012

Filed:

Jan 23, 2012

Appl. No.:

13/355963

Inventors:

Tsutomu Furuhashi - West Bloomfield MI, US
Dhyana Ramamurthy - Novi MI, US
Joseph Lubinski - South Lyon MI, US
Rebecca Spence - Novi MI, US

Assignee:

DENSO CORPORATION - Kariya-Shi
DENSO INTERNATIONAL AMERICA, INC. - Southfield MI

International Classification:

F04B 39/08
F04B 11/00
F04B 7/00

US Classification:

417505, 417437, 417540

Abstract:

A pump includes a pump casing defining a first chamber and a second chamber, and fluid moves from the first chamber to the second chamber during a stroke. The pump also includes a needle that is movably disposed in the first chamber and a valve carriage that is movably disposed in the second chamber. The valve carriage includes an internal stop, and the valve carriage also includes a cavity therein that is partially defined by the internal stop. The pump further includes a valve that is movably disposed within the cavity of the valve carriage, and the valve is operable to be impacted by the needle during the stroke. Also, the needle is operable to impact the valve carriage during the stroke. Moreover, the valve is operable to impact the internal stop during the stroke at a time different from the needle impacting the valve carriage.

US Patent:

20110265765, Nov 3, 2011

Filed:

Apr 21, 2011

Appl. No.:

13/091602

Inventors:

Tsutomu Furuhashi - West Bloomfield MI, US
Rebecca Spence - Novi MI, US
Joseph Lubinski - South Lyon MI, US
Dhyana Ramamurthy - Novi MI, US
Kaoru Oda - Toyokawa-shi, JP

Assignee:

DENSO CORPORATION - Kariya-Shi
DENSO INTERNATIONAL AMERICA, INC. - Southfield MI

International Classification:

F02M 59/46

US Classification:

123446

Abstract:

A pump may have a first chamber and a solenoid coil to control movement of a first valve member. A second chamber may have a second valve member to control fluid moving into a third chamber. A first fluid passageway may link the first and second chambers, a second passageway may link second and third chambers and a third passageway may link third and fourth chambers. After pressurizing the third chamber causing fluid to flow into and leave a fourth chamber, the third chamber depressurizes due to downward movement of a plunger. Upon depressurization with a solenoid coil energized, second valve member floats and then moves against a valve seat. While the second valve member is moving toward the valve seat, the solenoid coil is de-energized causing the first valve member to move and strike the second valve member when the second valve member is moving at maximum velocity.