Showing papers by "Saab Automobile AB published in 1994"

Variable stiffness balloon dilatation catheters

Abstract: A variable stiffness balloon dilatation catheter is disclosed in which one or more polymeric sleeves are heat-shrunk around portions of an inner tubular element so as to form stiffening bands that provide variable stiffness longitudinally along the catheter.

Medical balloon and method of making same

Abstract: Multi-lumen balloons for use as or in conjunction with balloon dilation catheters, and methods for making such balloons, are disclosed.

Method of preparing disposable sheath with optically transparent windows formed continuously integral therewith

Abstract: Sterile disposable coverings for endoscopes and similar optical medical instruments are disclosed together with a method for preparing such coverings. By forming a heated polymeric film with a mandrel of appropriate shape and dimensions, relatively long-length, very small diameter, closely-fitting, thin-walled sleeves are produced, each having a thin, substantially inelastic, optically transparent window formed continuously integral with the sleeve at or proximate to the closed, distal end of the sleeve.

Structural enclosure of combustion engines for the purpose of reducing engine noise

Abstract: The invention relates to an engine with a constructional design and material composition for optimum thermal conductivity and vibration damping functions. The invention consists in the cylinder section (11) surrounding the combustion chamber being made of a light metal alloy and in the lower part of the cylinder section being connected to a crankcase section (13) with integral lateral walls (21, 22) which enclose the cylinder section (11) with an air gap, and the crankcase section is made of a material with higher density than the cylinder section, preferably cast iron.

Distribution unit for a ventilation installation for a vehicle

Abstract: not available for EP0577663Abstract of corresponding document: US5366408PCT No. PCT/SE92/00185 Sec. 371 Date Sep. 27, 1993 Sec. 102(e) Date Sep. 27, 1993 PCT Filed Mar. 24, 1992 PCT Pub. No. WO92/17345 PCT Pub. Date Oct. 15, 1992.A distribution unit for a ventilation installation for a vehicle has a housing (2) which is provided with outlets (3-10) and has an at least partly cylindrical shell surface in which a valve device (13) is rotatable inside the cylindrical housing via a shaft (14) which is along the axis of the shell surface of the housing. In the cylindrical shell surface of the housing there is at least one concavity (20) which via an aperture (21) which is within the housing and is situated substantially in a radial plane of the housing is connected to the interior of the housing and forms an outlet (6). A thin-walled circular valve element (18) which is incorporated in the valve device (13) and is disc-shaped or basin-shaped cooperates with the aperture and is rotatable in the aforesaid radial plane.

Cylinder liner support arrangement

Abstract: A cylinder liner support arrangement in an internal combustion engine, preferably in which the cylinder block and cylinder head are integrated in a common monobloc element and the cylinder barrels for the engine pistons have cylinder liners which have their upper portions inserted in cylinder bores in the cylinder block. The lower portions of the cylinder liners are accommodated in cylindrical apertures in a common cylinder liner support which may be made as a single element and is removably secured to a lower surface of the cylinder block. The cylinder liner support includes a number (corresponding to the number of cylinders of the engine) of mutually connected supporting sleeves which are disposed in-line, delineate the cylindrical apertures and have their sleeve walls surrounding the lower portions of the cylinder liners and providing them with lateral support. The cylinder liner support includes a mounting plate from one side of which the supporting sleeves protrude. Along the side edges of the mounting plate fastening holes are provided to accommodate screws for screwing the cylinder liner support securely to the lower surface of the cylinder block.

Arrangement for a cruise control system for a motor vehicle

Abstract: Control unit (1) for a cruise control system for a motor vehicle including at least one manually operated movable switch (4) for operating the cruise control system. The switch (4) has a neutral position (6) and can, when moved away from the neutral position (6) in a first direction, assume a first position (8) in which the switch (4) gives a control unit (21) a signal for temporarily switching off the system without cancellation of set speed. The switch (4) can also, when moved away from the neutral position (6) in the first direction, assume a second position (10) in which the switch (4) conveys signals to the control unit (21) in order to facilitate for the cruise control system to access, in some predetermined manner, a set speed stored in a memory unit situated in the control unit (21), where the second position (10) can only be reached by the switch (4) passing through the first position (8).

Reinforced cylinder head

Abstract: A cast cylinder head of light metal incorporates a reinforcement made of a stronger material than the light metal. The reinforcement consists of a relatively narrow elongated steel plate (6) which stretches in a single piece along all the cylinders. The elongated steel plate (6) is provided with transverse arms (8) which stretch out approximately perpendicularly from the steel plate between the valve port apertures (3a, 4a, 5a, 6a) of each cylinder.

Control module containing logic controls for electric window operation in motor vehicles

Abstract: A control module (1) for servo assisted window operation in motor vehicles comprises a number of individual controls (2a-2d) for the respective side windows and also other controls (3, 4, 5) for actuating the locking out of rear seat controls for rear side windows, the release of jamming protection and the roof hatch servo The control module (1) is preferably intended for placing on a central console (16) between the vehicle's front seats for easy access by the driver Each individual control (2a-2d) for the respective side windows not only has an asymmetry of shape pointing towards the respective window but is also designed with first and second operating surfaces (12 and 13 respectively) which made it possible to press the control downwards towards and lift it upwards away from a horizontal baseplate (6) of the control module (1) so as to permit logical actuation of the controls (2a-2d) with respect to the movement of the windows This makes it easy for the driver to identify the right control and operate it in the right direction without taking his eyes off the roadway

Comparison of measured and predicted scattering coefficients at 94 GHz

Abstract: In the summer of 1991, the backscattering from various background surfaces were measured at 94 GHz. A frequency modulated radar was mounted in a skylift and the backscattering coefficients at HH and VV were estimated at different angles of incidence. The test surfaces included bare sand and soil surfaces, an asphalt road and lawn. Soil-moisture was sampled and surface roughness profiles were recorded using a laser profiler. In the analysis of the data, the measured backscattering coefficients were compared with predictions from different kinds of scattering models, such as the geometric optics and physical optics approximations, the field perturbation approximation and the integral equation model (IEM). Comparisons were also made with Lambert scattering and approximative solutions for fractal surfaces. The vegetation measurements were compared with predictions using a cloud model of dielectric discs. The results of the radar measurements showed that all the tested soil and sand surfaces generated incoherent scattering at 94 GHz with a weak dependence on the angle of incidence. An exception was the asphalt surface, however, and detailed comparisons with different scattering models were carried out using the autocorrelation function of the measured surface profile as input. The best agreement between measured and predicted scattering coefficients was obtained using the IEM-model. >

Computational Fluid Dynamics on Workstation Clusters in Industrial Environments

Abstract: In a joint project between the Swedish Institute of Applied Mathematics, ABB Corporate Research, SAAB Military Aircraft, and Volvo Flygmotor the possibility of running industrial production codes in parallel on workstation clusters is studied In this paper we report on the experiences with two such codes

Computer support for continuous improvements

Abstract: Abstract. The view of manufacturing has changed in recent years. This is evident from how the focus of management's attention is shifting more and more towards the basics of operating the business. The challenge to manufacturers in the West today is how to introduce leaner practices in their operations. The objective of this paper is to demonstrate how computer technology and information systems can be applied to support the transition to leaner practices in a complex operation. The problem with the large information systems developed to manage the complex operations of many Western companies is that they were designed to help maintain performance and not to support finding opportunities for new improved practices. Results from the ESPRIT II project, CIM for Multi-supplier Operations (CMSO), show that an existing data infrastructure can be effectively utilized to develop inexpensive, customized tools to support a process of continuous improvements. In this project a set of tools for planning the ...

Arrangement for distribution of cooling liquid in an internal combustion engine cooling jacket

Abstract: An arrangement for distribution of cooling liquid in the cooling liquid jacket in an internal combustion engine having cylinders disposed in-line in the cylinder block or in a bank of cylinders of the engine. The liquid jacket includes a liquid inlet chamber at one end of the row of cylinders and a liquid outlet chamber at the same end or at the opposite end of the row of cylinders and, in the cylinder block or bank of cylinders with associated cylinder head, mutually interconnected cooling liquid spaces and ducts which communicate with those chambers. In the lower portion of the cooling jacket, a liquid distribution pipe running along the row of cylinders is inserted at one side of the row of cylinders and has at one end a liquid inlet which communicates with the liquid inlet chamber. In the wall of the distribution pipe, liquid outlet holes are provided which are distributed along the distribution pipe and placed and directed in the distribution pipe wall so as to direct cooling water flows towards the cylinder tops and/or the spaces between them. These liquid outlet holes in the wall of the distribution pipe have successively increasing diameters away from the end of the row of cylinders where the liquid outlet chamber is situated. The outlet holes are preferably directed obliquely upwards toward the roof of the cooling jacket.

A Spinning Finite Beam Element of General Orientation Analyzed With Rayleigh/Timoshenko/Saint-Venant Theory

Abstract: Linear vibrations are studied for a straight uniform finite beam element of general orientation spinning at a constant angular speed about a fixed axis in the inertial space. The gyroscopic and circulatory matrices and also the geometric stiffness matrix of the beam element are presented. The effect of the centrifugal static axial load on the bending and torsional dynamic stiffnesses is thereby accounted for. The Rayleigh/Timoshenko/Saint-Venant theory is applied, and polynomial shape functions are used in the construction of the deformation fields. Non-zero off-diagonal elements in the gyroscopic and circulatory matrices indicate coupled bending/shearing/torsional/tensional free and forced modes of a generally oriented spinning beam. Two numerical examples demonstrate the use and performance of the beam element.Copyright © 1994 by ASME

Anti-aircraft gun with camera

Abstract: A device for aiming at a mobile target (4) and directing an anti-aircraft gun (1) is described. The direction of the barrel is adjustable in azimuth and elevation manually with handle or by means of servo-controlled motors (2). A ranging unit is mounted in a support, manually operated, directly or via servo-motors, pivotable in azimuth and elevation. It comprises a sight (3), preferably field-glasses, for optical aiming at the target along an aiming line (5), and a range finder (6) pivotable in azimuth. The device shows means (7, 11) for direct or indirect measuring of the angular rate of the aiming line in azimuth or elevation. Said means are arranged to emit signals, corresponding to their respective measured values, to a calculating unit (8), which is arranged guided by said received signals and information given about correction values, such as the ballistic data from the projectile fired from the anti-aircraft gun, prevailing wind vector, to calculate the required lead and offset angles of the direction of the barrel, and to emit corresponding signals for setting the direction of the barrel, preferably to said servo-controlled motors, so that a fired projectile shall hit the target. The device is primarily characterized in that a camera means (9) is arranged parallelly with said aiming line (5) connected to a correlation means (10) with which the displacement in azimuth and elevation of the camera picture of the target (4) relative to the aiming line (5) is determined in the form of a correction signal, with which said measured angular rate of the aiming line in azimuth and elevation is corrected.