Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7374512 | Shift control apparatus for automatic transmission When it is decided that it is impossible to shift the automatic transmission directly to the target speed position according to the second shifting-action decision made during a shifting control to shift the automatic transmission to a target speed according to a fi... | 05/20/2008 |
| 7291092 | Shift control apparatus and method for automatic transmission In shift control apparatus and method for an automatic transmission in which an engine speed is inputted, and a shift change in a shift stage of the automatic transmission is performed to make a gear shift, a shift revolution synchronization control in synchronizati... | 11/06/2007 |
| 7052436 | Method for triggering an upshift during kick-down conditions A motor vehicle for controlling an automatic gearshift stepped variable speed transmission that can be driven by a drive engine, in which, depending on an accelerator pedal position and an engine speed, upshifts or downshifts between the gear steps are triggered aut... | 05/30/2006 |
| 6915681 | Gear-shift control device and gear-shift control method for automatic transmission An ECT-ECU includes a circuit that calculates an oil temperature threshold on the basis of a signal input from one of an engine coolant temperature sensor, an engine intake air temperature sensor, and an AT hydraulic fluid temperature sensor if a signal for starting... | 07/12/2005 |
| 6827667 | Select-shock control system and method for automotive automatic transmission The method for decreasing gear select shock comprises determining whether a vehicle is stopped and if idle conditions exist based on vehicle operating parameters. It is then determined whether the vehicle has been stopped for longer than a predetermined period. If i... | 12/07/2004 |
| 6761664 | Shift control device and shift control method for vehicular automatic transmission When a current downshift is determined to be a multiple downshift, it is determined whether or not a torque down during a first downshift is in a condition of interfering with learning performed for stabilizing the downshift operation during a second downshift is ex... | 07/13/2004 |
| 6689016 | Method and apparatus for producing downshift signals In order to configure the downshift method, and to create signals for an automobile automatic transmission more conveniently, a tilting device of a multi-function device with at least one moveable magnet element as a downshift sensor device is used. When ... | 02/10/2004 |
| 6612967 | Kick down shift control apparatus of automatic transmission and method therefor A kick down shift control apparatus of an automatic transmission of a vehicle comprising: vehicle running state sensing means for checking a running state of the vehicle; engine control means for controlling engine outputs in response to a signal sensed b... | 09/02/2003 |
| 6547691 | Shift control system for continuously variable transmission A shift control system for a continuously variable transmission has a target gear ratio corresponding value calculating device for calculating a target gear ratio corresponding value of the continuously variable transmission according to at least a thrott... | 04/15/2003 |
| 6454678 | Shift control method for automatic transmission A shift control method for an automatic transmission includes the steps of outputting a predetermined shift control signal while driving in a second speed for controlling shifting into a third speed if signals indicating that shifting from the second spee... | 09/24/2002 |
| 6139470 | Control apparatus for hydraulically operated vehicular transmission A control apparatus for a hydraulically operated vehicular transmission includes a orifice, a bypass path bypassing the orifice and a switching valve provided in the bypass path. The orifice and bypass path are provided in an hydraulic oil supplying path ... | 10/31/2000 |
| 6102830 | Shift control device for automatic transmission When a shift to a second gear ratio (second ratio) is determined during a shift control for a first shift (shift from fourth ratio to third ratio), the process status, or circumstances, of the first shift is determined using a hydraulic pressure for a fou... | 08/15/2000 |
| 6068575 | Control apparatus for hydraulically operated vehicular transmission At downshifting, hydraulic pressure of hydraulic clutch on engaging side (ON clutch pressure) is increased when an input and output speed ratio ("Gratio") has fallen below a predetermined value YGDNS. YGDNS is variably set depending on the vehicle speed a... | 05/30/2000 |
| 5605519 | Method for controlling kickdown while braking and as a function of vehicle's operating parameters A method for controlling preferably an electro-hydraulic automatic transmission of a motor vehicle fitted with a combustion engine provides a gradual kick-down while braking. In particular the kick-down is performed when, in the course of approaching a be... | 02/25/1997 |
| 4967611 | Shift scheduling in automatic transmission with throttle modifier and partial throttle pressures A hydraulic system for an automatic transmission comprises a governor valve generating a governor pressure, a throttle valve generating a throttle pressure, a throttle modifier valve generating a throttle modifier pressure which is an amplified pressure o... | 11/06/1990 |
| 4729263 | Pressure regulating arrangement with a damping device for a control pressure of an automatic change-speed transmission In a pressure-regulating arrangement for the control pressure of a shifting arrangement of a change-speed transmission, a slide valve member is actuatable by an adjusting sleeve connected with a control member of a driving engine by way of a pressure memb... | 03/08/1988 |
| 4680989 | Hydraulic shift control device for an automatic transmission having two gear ratios A vehicle speed-dependent and engine load-dependent hydraulic control device for heavy vehicles shifting between two gear ratios is provided with a modulator valve modulating main input pressure by action of the engine load-dependent pressure, a shift val... | 07/21/1987 |
| 4573375 | Control system and method for automatic transmission for automotive vehicle In an automatic transmission for an automotive vehicle, an operating area covered by a high gear ratio is extended toward low vehicle speed side and the high gear ratio is released in response to the opening degree of the throttle and vehicle speed. The h... | 03/04/1986 |
| 4462279 | 1-2 Shift valve for an automatic transmission The shift valve operates in response to a governor pressure counteracting a throttle pressure and in response to a detent pressure used in a kickdown operation. The valve is capable of shifting up from a first speed range to a second speed range as well a... | 07/31/1984 |
| 4406181 | Automatic transmission control system with holddown device An automatic transmission includes a gear transmission mechanism with several friction engaging mechanisms. Selective supply of actuating pressure to these mechanisms selectively provides different speed stages from the transmission, including a directly ... | 09/27/1983 |
| 4391165 | Kick-down shifting mechanism for automatic change-speed transmissions A kick-down circuit for automatic change-speed transmissions, with a kick-down control member transmitting a kick-down control signal when an accelerator pedal is "floored" and with at least one gearshift valve for the operating pressure of a shift-actuat... | 07/05/1983 |
| 4334442 | Shift valve arrangement of hydraulic transmission control system A shift valve arrangement for incorporation into a hydraulic control system of an automatic power transmission, comprising a shift valve including separate switching and control valve elements arranged and movable in series with each other, the control va... | 06/15/1982 |
| 4331045 | Pneumatic control system for an automatic vehicle transmission A pneumatic control system is disclosed for an automatic transmission for a vehicle of the type having a mechanical planetary gear train with hydraulically actuatable gear elements. A manual control valve dependent upon the position of the transmission ge... | 05/25/1982 |
| 4301697 | Hydraulic control system for automatic power transmission having transmission throttle valve with failsafe means A hydraulic control system for an automatic power transmission for an automotive vehicle, comprising a pressure regulator valve for producing a line pressure, at least the shift valve predominant over shifts between predetermined gear ratios and operable ... | 11/24/1981 |
| 4296651 | Automatic power transmission shift valve A shift valve for use in a hydraulic control system of an automatic power transmission, having valve spools formed with a plurality of pressure acting areas which can be selected independently of each other for providing shift points for upshifting and do... | 10/27/1981 |
| 4282781 | Transmission throttle valve of automatic power transmission A transmission throttle valve for use in a hydraulic control system of an automotive automatic power transmission, comprising a valve plunger movable with the accelerator pedal of an automotive vehicle, a valve spool arranged and movable in line with the ... | 08/11/1981 |
| 4248106 | First-second gear shift valve of hydraulic transmission control system In a hydraulic control system of an automatic power transmission is provided a first-second gear shift valve which is to be acted upon through only one fluid inlet port by a signal fluid pressure representative of a manual first forward drive range select... | 02/03/1981 |
| 4134313 | Automatic transmission for automobiles Automatic transmissions for automobiles include a hydraulic torque converter and a transmission gear mechanism which has a plurality of friction devices such as a clutch and brakes whereby a plurality of different driving stages can be provided through se... | 01/16/1979 |
| 4079638 | Device for the automatic or manual selection of the ratio of a gearbox on a motor vehicle A device for selecting the ratio of the gearbox on a vehicle. The ratio is selected by electronic means which include a system for putting the engine speed under the control of the shaft speed, a system defining the ratios allowed, a system for introducin... | 03/21/1978 |
| 4008630 | Fluid pressure control system for automatic transmissions A fluid pressure control system for automatic transmission includes a fluid pressure source, a fluid pressure regulating valve for regulating the fluid from the source to a particular line pressure, and a plurality of frictional engaging devices, adapted ... | 02/22/1977 |
