Showing papers on "Slip ratio published in 1970"

An Exact Expression for the Diffusion Slip Velocity in a Binary Gas Mixture

Abstract: The method of elementary solutions is used to obtain an exact expression for the diffusion slip velocity for a binary gas mixture as described by a model employed recently by Yalamov, Ivchenko, and Derjagin.

Slip ratio calculating device

Abstract: A slip ratio calculating device for calculating a slip ratio, i.e., the ratio of two revolutions are prepared, one of the voltage signals is multiplied by one n-th in a coefficient multiplying circuit. This coefficient-multiplied output is integrated in a first integrating circuit and then compared with the other of said voltage signals in a comparator. This comparator generates an output when the two input signals become equal. The resultant output works to reset the integrating circuit through a reset pulse generating circuit. The first integrating circuit renews integration upon disappearance of a reset pulse. There is provided a second integrating circuit which integrates the output of a constant voltage generating circuit and is reset by said reset pulse. The peak value of the integrated voltage is proportional to the revolution ratio. Thus, the ratio of two revolutions which is subjected to restless change can be obtained in the form of the peak value of the output voltage from the second integrating circuit.

System for controlling the shift point of fluid controlled automatic transmission for vehicles

Abstract: A system for controlling the shift point of a fluid controlled automatic transmission in which means are provided so that a shift from one gear position to another takes place at a lower slip ratio of the torque converter when the throttle valve opening is less than a predetermined setting and at a higher slip ratio of the torque converter when the throttle valve opening is more than the predetermined setting.

Device for controlling in a stepwise manner hydraulic pressure of working oil for use with an automatic transmission having a torque-converter

Abstract: A device for step controlling the hydraulic pressure of working oil for an automatic transmission having a torque-converter comprising means for generating a signal representative of a slip ratio between speeds of a turbine and pump of the torque-converter, first valve means actuated by said signal so as to be opened or closed thereby varying the working oil pressure and second valve means actuated by the oil discharged from said first valve means for setting a predetermined pressure in response to said ratio depending upon whether it is higher or lower than at least two predetermined points, thereby reducing in a stepwise manner the pressure of working oil acting upon friction engaging means of the torque-converter when said ratio is increased whereby the working oil pressure can be suitably controlled in response to a desired torque transmission by the torque-converter.

Pneumatic Conveying of Solids : (Part 1, On Slip Velocities and Interaction between Wall and Particles in Horizontal Lines)

Abstract: In part 1 of this series it is attempted to describe how the slip velocity in horizontal lines depends on the tube diameter and the transport air velocity, considering momentum losses by the collision of particles with the wall. The direct determination of particle velocities and velocity losses by collision is made, using a combination of a rotating shutter and photographic measurements of particle trajectories. From these results the coefficient suggested by G. Weidner is obtained and it is shown that the experimental results of other investigators can be satisfactorily described with it. It is also explained that the slip velocity becomes constant in the region of lower transport air velocities.

Low-Speed Slip Flow Over a Wedge

Abstract: The problem of low-speed slip flow of a rarefied gas over a wedge has been solved using Meksyn’s asymptotic method of integrating the boundary-layer equations. Detailed results are given for slip velocity and developing velocity profiles for various wedge angles. The solution tends far downstream asymptotically to the Falkner and Skan profiles of conventional nonslip flow. In addition, the first correction to the skin friction due to velocity slip is found to be of the order of the first power of the molecular mean free path of the gas.