Ab Volvo

Rockwool Aktiebolaget

Hans E Brelen

Ulf L Aberg

Sven I Otteblad

Ralph G Dovertie

Stellan Dahlberg

Arvid S Dahlberg

Svante Ragnar Samuelson

Erner T Brynielsson

Per Folke Wistrand

Stig E Franzen

A method is provided for improving the uniformity of the surface weight of a mineral wool mat. The mat is produced from a mineral melt which is converted into fibers, these fibers being introduced into a gas-formed stream providing a transport medium for these fibers. The transport medium and the mineral fibers carried thereby are transported to a moveable collector band on one side of which the mineral wool is deposited so as to form the mineral wool mat, the transport medium being caused to pass through the collector band by means of a fan or the like. The method comprises measuring at least one variable which is characteristic of the transport medium and which varies in relationship to the amount of mineral wool deposited. Examples of such a variable include the pressure drop across the transport medium when passing through the mineral wool mat, the rise in temperature of the transport medium due to heat transfer from the mineral material, and the power supplied to the fan which provides movement of the transport medium. The results of the measuring step are fed to a control device for controlling the speed of movement of the collector band such that the speed of the collector band is varied in direct relationship to the amount of fiber deposited on the collector band, i.e., the greater the amount of fiber, the greater the speed, whereby the mineral fiber material is deposited on the collector band with an evenly distributed surface weight.

Method for determining the surface weight of a mineral wool mat

A method is provided for controlling the surface weight of a mineral wool mat in a process in which fibers of mineral wool are produced by spinning a mineral melt and the mineral wool formed from the fibers is transferred to a collection device using a stream of gas which is separated from the mineral wool in the collection device, the mineral wool forming a mat on a collection band. The method concerns measuring at least two variables which influence the amount of mineral wool formed per unit time and predicting, based on these measurements, the production of mineral wool at a predetermined future point in time. The surface weight of the mineral wool mat is measured along with the speed of the collection band and these quantities are used to determine the actual amount of mineral wool produced at the predetermined time. The values corresponding to the actual and predicted amounts are compared to determine the error in the latter and this information together with updated measurements of the two variables is used to make a new prediction.

Method for control of the surface weight of a mineral wool mat

A system for combined automatic and manual control of the motion of a vehicle comprises at least one manual control device and automatic equipment with at least one executing device. The executing device is coupled to the manual control device in such a way that a counterforce is generated in the manual control device to the force supplied by the driver. This counterforce is a function of the deviation, produced by the driver, from the intention of the automatic equipment. The automatic equipment is such that, over the whole control range, this counterforce is less than the force that the driver is able to apply on the manual control.

Combined automatic and manual guidance system

A foot-operated device for controlling engine power and braking effect in motor vehicles, said device comprising a pedal being pivotably mounted on a pedal holder about a first axis parallel to the plane of the pedal, and being intended for controlling the engine power and normal vehicle braking with the aid of mutually opposing pedal movements about said first axis which is fixed in relation to the pedal holder. The pedal holder is pivotably mounted in the vehicle about a second axis and is adapted to provide emergency braking at a relatively heavy depression of the pedal in the direction of the lower part of the leg of the vehicle operator by means of the movement of the pedal holder about said second axis as a result of said heavy depression of the pedal.

Foot-operated device for controlling engine power and braking effect in

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Skovde, Sweden

Hans E Brelen