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.:
Date of Patent:
Mar. 21, 2000
Filed:
Jan. 16, 1998
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A power of an input shaft driven by an engine is divided by a power dividing device and transmitted to first and second output shafts and a hydraulic pump of a hydrostatic continuously variable transmission is driven by the first output shaft, whereas a hydraulic motor is driven by the second output shaft through a mechanical transmission device and also by the hydraulic pump. A main oil pump is provided at the input shaft which rotates at the same speed as an engine speed, and a subsidiary oil pump is provided at the first output shaft which decreases rotational speed thereof to zero with an increase in the engine rotational speed. In a low rotational speed region of the engine, oil is supplied by both the main oil pump and the subsidiary oil pump, whereas in a high rotational speed region of the engine, oil is supplied by only the main oil pump. With this construction, it is possible to prevent a waste of energy required to drive the oil pump in the high rotational speed region of the engine while ensuring the quantity of oil supply from the oil pump in the low rotational speed region of the engine.