摘要:
A hydraulic control system for a continuously variable transmission having a first and a second variable-diameter pulley provided on a first and a second shaft, a transmission belt connecting the first and second pulleys to transmit power from one of the first and second pulleys to the other, and a pair of hydraulic cylinders for changing an effective diameter of the pulleys engaging the belt. The hydraulic control system includes a hydraulic source delivering a pressurized fluid, and a flow control device for controlling a flow of the pressurized fluid from said hydraulic source into one of said hydraulic cylinders, and a flow of the fluid from said one hydraulic cylinder, thereby changing the effective diameters of the pulleys to vary a speed ratio of the transmission. The control system comprises a pressure regulating device for regulating the pressurized fluid which is delivered from the hydraulic source and applied to the flow control device so that a pressure of the pressurized fluid is higher than a pressure in the above-indicated one hydraulic cylinder by a predetermined value.
摘要:
A hydraulic control system for a continuously variable transmission having two variable-diameter pulleys, a belt connecting the pulleys to transmit power from one of the pulleys to the other, and corresponding cylinders for changing effective diameters of the pulleys. The control system comprises: a hydraulic source delivering a pressurized fluid; a first pressure regulating device for regulating the pressurized fluid to apply a first line pressure to one of the cylinders for controlling a tension of the belt; a flow control device for controlling flow of the fluid into and from the other cylinder to change the effective diameters of the pulleys to vary a speed ratio of the transmission; a second pressure regulating device provided between the hydraulic source and the first pressure regulating device to regulate the pressurized fluid to apply a second line pressure to the flow control device, the second line pressure being higher than a pressure in the above-indicated hydraulic cylinder or the first line pressure by a predetermined value; and a releasing device for releasing the second pressure regulating device from its regulating operation while the speed ratio of the transmission is changed with the fluid discharged from the above-indicated other cylinder, or while the speed ratio is held constant.
摘要:
An integrated circuit package comprises a power supply conductor film having a potential and conductor columns insulated from and passed through the power supply conductor film. A power supply conductor column comprises one of the conductor columns connected to a power supply having a potential different from the power supply conductor film. The other conductor columns are signal conductor columns for exchanging signals with mounted integrated circuits. An insulation space between the power supply conductor film and the power supply conductor column is greater than an insulation space between the power supply conductor film and a signal conductor column. Thereby, a probability of short-circuit occurrence in the power supply conductor film across the power supply conductor column is lowered.
摘要:
A terminal for an electric circuit device, comprises a copper core, a gold (Au) layer provided over the copper core, and a nickel (Ni) layer having the thickness of 1.5 .mu.m or less, provided under the gold (Au) layer. In another embodiment, the core is made of an alloy containing (Ni) and covered by a metallized surface layer made of copper.
摘要:
An integrated circuit package in which three conductor columns for connecting an insulating substrate and an integrated circuit are connected in parallel for use as I/O vias. Thereby, the conductor columns in a multilayer wiring portion between an integrated circuit and an insulating substrate is prevented from disconnecting.
摘要:
In a wired base plate for an electronic part, an infinite number of metallic posts made of copper are provided to a lid joining section of a plural wire layer portion, which section includes a lid joining surface area to which a lid is joined. The metallic posts supports a pressure applied thereto from a lid at the time of mounting of the wired base plate on a circuit board and prevent the plural wire layer portion having a plurality of conductor wire layers and a plurality of resinous insulation layers, from being deformed by compression. A package for an electronic part having such a wired base plate is also provided.
摘要:
In a method of fabricating a multilayered interconnection for integrated circuit package, a coating of a metallized conductive pattern is formed on an upper surface of the substrate. A plurality of vertical copper studs are formed on the substrate for an interconnection with the metallized conductive pattern. A polyimide slurry is provided on the surface of the substrate to cover each top surface of the conductive studs. An upper surface of the polyimide slurry is polished to expose each top surface of the copper studs. A masking film is provided on each top surface of the copper studs prior to supplying an intermediate derivative of a polyimide polymer. The masking film works to protect the intermediate derivative against an chemically reaction with the copper studs to avoid a chelate compound from being produced at the time of heating step followed; A coat of the intermediate derivative of the polyimide polymer is provided entirely on the polished surface of the polyimide slurry, and is heated to form a coating of a polyimide layer. Then the coating of the polyimide layer is partly removed to expose portions corresponding to each top surface of the copper studs. The masking film is removed by etching.
摘要:
An apparatus for controlling ignition timing during a shift in a vehicular automatic transmission is provided that is capable of suppressing shift shock in the event that input torque of the automatic transmission is affected by external changes, such as changes in fuel and air pressure and the like, by adjusting immediately to those changes. This control apparatus is provided with an ignition timing controller that controls an ignition timing retard amount; a calculator that calculates a basic retard amount; a detector that detects an engine retard amount; a determinator that determines a retard correction value based on a shift mode of the automatic transmission and the like; and a corrector that corrects the ignition timing retard amount of the controller based on the retard correction value, the basic retard amount, and the engine retard amount.
摘要:
In a multi-layer wiring board having a strip line structure in which a grounding conductor wiring and a signal circuit wiring are disposed by interposing therebetween an insulation layer, the grounding conductor wiring is in the form of a grid and an open area ratio Rx [%]of the grid and a line width ratio Ry=Wg/Ws have a relationship expressed by Ry, .ltoreq.25.98.times.Rx.sup.-0.3871 -4.370 where Wg is the line width of the grounding conductor wiring, Sg is the width of an opening of the grid, Ws is the line width of the signal circuit wiring, and Rx={Sg/(Wg+Sg)}.sup.2 .times.100.
摘要:
An object of the present invention is to match impedance of each portion of whole lines of a signal wiring with the integrated circuit mounted on the package. All ground planes are deleted within a region vertically under/above a connection pad provided on the top- or bottom-surface of a polyimide multilayer part, whereby no capacitance is generated between the connection pad and the ground planes, so that the impedance of the signal wiring within the region right under/above the connection pad is prevented from being lowered.