dc.date.accessioned | 2015-07-23T15:35:19Z | |
dc.date.available | 2015-07-23T15:35:19Z | |
dc.date.issued | 1977-05-17 | |
dc.identifier | pat4023442 | |
dc.identifier.uri | https://hdl.handle.net/11244/15322 | |
dc.description.abstract | This invention describes a system of control for a power source-transmission-load system such as might be used on an off-the-road vehicle, for example. The power source is an internal combustion engine having a known optimum characteristic of desired manifold vacuum versus engine speed. The transmission is a hydrostatic or hydromechanical transmission having infinitely variable speed ratio and having a control means for varying said speed ratio. The control system includes a transducer means for measuring engine speed and converting this quantity into an analog fluid pressure proportional to the speed. This analog fluid pressure proportional to speed is modified in a function generator to produce an analog fluid pressure which is proportional to the desired manifold vacuum as a function of engine speed. Means are provided for measuring the actual manifold vacuum and for comparing the actual manifold vacuum with the desired manifold vacuum on a continuous basis. This comparison produces an error signal which is amplified and used to control a hydraulic system to operate the control means in order to vary the transmission ratio of the hydrostatic or hydromechanical transmission to obtain a speed ratio such that will provide optimum engine conditions. | |
dc.format | application/pdf | |
dc.format.extent | 8 pages | |
dc.language | en_US | |
dc.publisher | U.S. Patent and Trademark Office | |
dc.title | Automatic Control Means for Infinitely Variable Transmission | |
dc.type | text | |
osu.filename | pat4023442.pdf | |
osu.accesstype | Open Access | |
dc.type.genre | Patent | |
dc.contributor.inventor | Woods, Robert L. | |
dc.contributor.inventor | Reid, Karl N., Jr. | |
dc.contributor.inventor | Gunda, Rajamouli | |
dc.identifier.patentID | 4,023,442 | |
dc.date.filed | 1975-07-07 | |
dc.contributor.assignee | Oklahoma State University | |
dc.subject.primaryusclass | 477/68 | |
dc.subject.otherusclasses | 477/43 | |
dc.subject.cpcclasses | B60W 10/06 (20130101) | |
dc.subject.cpcclasses | B60W 30/18 (20130101) | |
dc.subject.cpcclasses | B60K 2741/16 (20130101) | |
dc.subject.cpcclasses | Y10T 477/636 (20150115) | |
dc.subject.cpcclasses | Y10T 477/623 (20150115) | |