Work vehicle and method of controlling work vehicle
US-2016082950-A1 · Mar 24, 2016 · US
Vehicle drive device
US9458928B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9458928-B2 |
| Application number | US-201514726961-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 1, 2015 |
| Priority date | Jun 2, 2014 |
| Publication date | Oct 4, 2016 |
| Grant date | Oct 4, 2016 |
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- Title
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- Abstract
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- Assignees and inventors
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Abstract
Official abstract text for this publication.
A vehicle drive device includes an oil pump, a first one-way clutch, a first transmission path configured to transmit a driving force generated in an engine to the oil pump via the first one-way clutch, a second one-way clutch, a second transmission path configured to transmit a driving force from an output shaft of a transmission portion to the oil pump via the second one-way clutch, and a power transmission interruption device configured to interrupt transmission of the driving force generated in the engine to a drive wheel. A speed ratio between the engine and the oil pump in the first transmission path is set to be smaller than a speed ratio obtained by multiplying the smallest speed ratio of the transmission portion by a speed ratio between the transmission portion and the oil pump in the second transmission path.
First claim
Opening claim text (preview).
What is claimed is: 1. A vehicle drive device comprising: an oil pump; a first one-way clutch; a first transmission path configured to transmit a driving force generated in an engine to the oil pump via the first one-way clutch; a second one-way clutch; a second transmission path configured to transmit a driving force from an output shaft of a transmission portion to the oil pump via the second one-way clutch; and a power transmission interruption device configured to interrupt transmission of the driving force generated in the engine to a drive wheel, wherein a speed ratio between the engine and the oil pump in the first transmission path is set to be smaller than a speed ratio obtained by multiplying a smallest speed ratio of the transmission portion by a speed ratio between the transmission portion and the oil pump in the second transmission path. 2. The vehicle drive device according to claim 1 , further comprising: a first sprocket coupled to a rotating shaft of the engine via the first one-way clutch; a second sprocket coupled to the output shaft of the transmission portion via the second one-way clutch; a third sprocket coupled to the oil pump; and one chain or one belt configured to transmit power to any of the first sprocket, the second sprocket, and the third sprocket. 3. The vehicle drive device according to claim 1 , wherein the transmission portion is a stepped transmission, the stepped transmission includes brakes and clutches as engaging elements, and the power transmission interruption device is constituted by at least one of the engaging elements.
Assignees
Inventors
Classifications
driven by means of chains, belts, or like endless members · CPC title
- F16H61/0028Primary
using a single pump driven by different power sources · CPC title
composed of a number of gear trains without drive passing from one train to another · CPC title
Supply of control fluid; Pumps therefor · CPC title
Combinations of two or more transmissions · CPC title
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Frequently asked questions
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- What does patent US9458928B2 cover?
- A vehicle drive device includes an oil pump, a first one-way clutch, a first transmission path configured to transmit a driving force generated in an engine to the oil pump via the first one-way clutch, a second one-way clutch, a second transmission path configured to transmit a driving force from an output shaft of a transmission portion to the oil pump via the second one-way clutch, and a pow…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16H61/0028. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Oct 04 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).