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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9249557 B1

PDFFull Text
Date of Patent:
Feb. 02, 2016

Filed:

Aug. 15, 2012

Work vehicle

Applicants:

Hidekazu Moriki, Tokyo, JP;

Satoru Kaneko, Tokyo, JP;

Takashi Ikimi, Hitachi, JP;

Noritaka Ito, Ushiku, JP;

Inventors:

Hidekazu Moriki, Tokyo, JP;

Satoru Kaneko, Tokyo, JP;

Takashi Ikimi, Hitachi, JP;

Noritaka Ito, Ushiku, JP;

Assignee:

HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;

Attorney:

Baker Botts L.L.P

Primary Examiner:

John R Olszewski

Assistant Examiner:

Gerrad A Foster

Int. Cl.
CPC ...
E02F 9/22 (2006.01); B60K 6/20 (2007.10); B60L 15/20 (2006.01); B60W 20/00 (2006.01); E02F 9/20 (2006.01); B60K 6/46 (2007.10); B60L 11/00 (2006.01); B60W 10/06 (2006.01); B60W 10/08 (2006.01); B60W 10/24 (2006.01); B60W 10/26 (2006.01); B60W 30/188 (2012.01); E02F 9/08 (2006.01); B60L 7/14 (2006.01); B60L 11/12 (2006.01); B60L 11/14 (2006.01); B60L 11/18 (2006.01); B60K 6/52 (2007.10); B60W 10/30 (2006.01);
U.S. Cl.
CPC ...
E02F 9/2246 (2013.01); B60K 6/46 (2013.01); B60K 6/52 (2013.01); B60L 7/14 (2013.01); B60L 11/005 (2013.01); B60L 11/123 (2013.01); B60L 11/14 (2013.01); B60L 11/1861 (2013.01); B60L 15/2009 (2013.01); B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 10/24 (2013.01); B60W 10/26 (2013.01); B60W 10/30 (2013.01); B60W 20/00 (2013.01); B60W 30/1886 (2013.01); B60W 30/1888 (2013.01); E02F 9/0841 (2013.01); E02F 9/2075 (2013.01); E02F 9/2079 (2013.01); E02F 9/2095 (2013.01); E02F 9/2235 (2013.01); E02F 9/2296 (2013.01); B60L 2200/40 (2013.01); B60L 2210/10 (2013.01); B60L 2210/40 (2013.01); B60L 2220/42 (2013.01); B60L 2240/12 (2013.01); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01); B60L 2240/441 (2013.01); B60L 2240/443 (2013.01); B60L 2250/24 (2013.01); B60L 2260/28 (2013.01); B60W 20/1088 (2013.01); B60W 2300/17 (2013.01); B60W 2510/0666 (2013.01); B60W 2510/09 (2013.01); B60W 2510/305 (2013.01); Y02T 10/6208 (2013.01); Y02T 10/6217 (2013.01); Y02T 10/6282 (2013.01); Y02T 10/6286 (2013.01); Y02T 10/648 (2013.01); Y02T 10/7005 (2013.01); Y02T 10/705 (2013.01); Y02T 10/7022 (2013.01); Y02T 10/7044 (2013.01); Y02T 10/7077 (2013.01); Y02T 10/7216 (2013.01); Y02T 10/7241 (2013.01); Y02T 10/7275 (2013.01); Y10S 903/93 (2013.01);
Abstract

When the total value of demanded hydraulic power and demanded traveling power is larger than the sum of the engine power that can be output by an engine () and of the discharge power that can be discharged by an electrical storage device (), the actual power of a hydraulic pump () is increased from the value at the time of demand toward the demanded hydraulic power under the constraint of a predetermined limit. While the power of the hydraulic pump is being subjected to the predetermined limit, the actual power of the traveling motor is decreased from the value at the time of demand by a value smaller than the magnitude of the predetermined limit. This prevents worsening of ride comfort attributable to the distribution of power between the hydraulic pump and the traveling motor.

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