Bibliographic Citation
| Document | For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field. For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability. |
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| Title | Engine brake control in automatic transmission |
| Creator/Author | Hayasaki, K. ; Sugano, K. |
| Publication Date | 1988 Sep 13 |
| OSTI Identifier | OSTI ID: 6620546 |
| Report Number(s) | US 4770066 |
| Resource Type | Patent |
| Resource Relation | Pat. File: Filed date 14 Jul 1986 |
| Subject | 330100 -- Internal Combustion Engines; BRAKES-- CONTROL SYSTEMS;INTERNAL COMBUSTION ENGINES-- MECHANICAL TRANSMISSIONS;MECHANICAL TRANSMISSIONS-- BRAKES; AUTOMOBILES;CONTROL EQUIPMENT;GEARS;HYDRAULICS;PRESSURE MEASUREMENT;VALVES |
| Related Subject | CONTROL EQUIPMENT;ENGINES;EQUIPMENT;FLOW REGULATORS;FLUID MECHANICS;HEAT ENGINES;MACHINE PARTS;MECHANICS;VEHICLES |
| Description/Abstract | This patent describes an engine braking control for a transmission for an automotive vehicle having an engine, the transmission including an input member drivingly coupled to the engine and an output member subject to load from driving wheels of the automotive vehicle, the transmission also including a first rotary member, a second rotary member, a hydraulically operated clutch selectively establishing a drive connection between the first rotary member and the second rotary member, and a one-way clutch arranged in parallel to the hydraulically operated clutch such that when the hydraulically operated clutch is released, the one-way clutch transmits forward torque from the first rotary member to the second rotary member, but interrupts transmission of revers torque to the first rotary member from the second rotary member, the engine braking control comprising: means for providing an engine braking command fluid pressure signal when demanded by a vehicle operator; a valve means for normally discharging hydraulic fluid from the hydraulically operated clutch to deactivate the hydraulically operated clutch, the valve means being fluidly connected to the hydraulically operated clutch, the engine braking command fluid pressure signal providing means and a drain port.^The valve means including a valve spool having a first position where the hydraulically operated clutch is allowed to communicate with the drain port to permit discharge of hydraulic fluid therefrom and thus the hydraulically operated clutch is caused to be deactivated and a second position where the hydraulically operated clutch is disconnected from the drain port and allowed to communicate with the engine braking command fluid pressure signal. |
| Country of Publication | United States |
| Language | English |
| Format | Pages: v |
| Availability | Patent and Trademark Office, Box 9, Washington, DC 20232. |
| Rights | Nissan Motor Co., Ltd., Yokohama |
| System Entry Date | 2001 May 13 |
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Last Updated: 02/11/2009