Zf Friedrichshafen Ag

Dornier Luftfahrt Gmbh

Werner Fuchs

Thilo Schmidt

Ruben Cuppers

Gerhard Fischer

A method of operating a transmission of a vehicle drive-train that comprises frictional shifting elements and an interlocking shifting element. In the neutral operating condition of the transmission, and in the case of an operating condition variation of the vehicle drive-train in which, when it is required to establish the force flow in the transmission, the interlocking shifting element is to be changed from a disengaged to an engaged operating condition, by increasing the transmission capacities of at least two frictional shifting elements which have to be engaged for producing the force flow, a rotational speed difference in the area of the interlocking shifting element is determined, and a drive torque of a drive machine is adjusted to a level that brings the speed difference within a predefined range at which the interlocking shifting element is approximately synchronized and can therefore be engaged.

Method for operating a transmission device of a vehicle drivetrain

A display system for aircraft for showing the attitude, particularly the rolling and pitching position or the flight path angle, comprising a windshield projection device (HUD 'HEAD-UP DISPLAY') with devices for generating and displaying an airplane symbol, a symbol which is stabilized fixed to earth for the displaying of the position of the true horizon as well as for generating and displaying symbols for the rolling and pitching angle or of the path angle in the exterior field of view of the pilot as a function of the values measured by the corresponding instruments. In this case, a display of the attitude is generated by means of a reference symbol representing the airplane and an information symbol which changes with respect to the reference symbol in its position and shape--and is dependent on the rolling angle (.phi.) and pitching angle (.theta.) or path angle (.gamma.).

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Markdorf, Germany

Werner Fuchs