Mannesmann Aktiengesellschaft

Fichtel & Sachs Ag

Hans-Joachim Schmidt-Brucken

Dieter Lutz

Wolfgang Thieler

Franz Nagler

Hans-Jurgen Drexl

Stefan Schiebold

Michael Wagner

Holger Westendorf

Rainer Wychnanek

Martin Ochs

Uwe Adler

Manfred Roder

Thomas Kuhn

Uwe Alder

Process for changing the speed of a vehicle and a system for

Non-trackbound vehicle with an electrodynamic converter and a throttle

A motor vehicle including a unit (2) consisting of an internal combustion engine, a generator supplying current to electric motors (12, 16) coupled with driving wheels (14, 18) over an energy distributor/power electronics system (8) and a battery which is supplied with energy by the internal combustion engine/generator unit via the energy distributor (2). An electronic control system (20) controls the energy distributor (8) as a function of a driving signal according to boundary conditions, for example, according to the least possible specific fuel consumption. A temporary increase in the power required to drive the motors can be supplied by the battery (22). In the event that the increase in power lasts for longer periods, the internal combustion engine, which as far as possible operates in a state that ensures low fuel consumption, is accelerated in order to cover the demand for high power. At the maximum output of the internal combustion engine, the energy stored in the battery (22) supplies the power for the additional thrust.

Non-trackbound vehicle with an electric transducer

Rotation speed sensing in a drive arrangement for a motor vehicle

Assisted steering system for non-trackbound vehicle

Drive system for a motor vehicle

Drive and braking arrangement for a motor vehicle

An apparatus for determining a critical driving torque and information representing the coefficient of friction at the wheel grip limit for a vehicle having a plurality of driven wheels. It is suggested that torque control devices be assigned to at least two of the driven wheels so that the ratio of the driving torques of the two driven wheels can be varied, wherein torque sensing device generate a torque signal corresponding to the magnitude of at least the greater of the driving torques of the driven wheels. A wheel slip sensing device is associated with the driven wheels and detects an increase in the slip of the wheel with the greater driving torque beyond a predetermined limit. The information on the coefficient of friction is generated depending on the magnitude of the detected driving torque of the wheel whose slip exceeds the limit. To determine the information concerning the coefficient of friction, the distribution of driving torque between the front axle and rear axle is periodically increased in an alternating manner.

Arrangement for detecting a critical driving torque in a motor vehicle

A slip control loop (13) is proposed which compares the actual differential speed between input and output speed of a friction clutch (5) of a motor vehicle with a desired differential value and adjusts a positioning drive (7) of the clutch (5) according to the desired differential speed. To increase the accuracy of control, a desired position signal from a clutch characteristic curve memory (25) is additively superimposed in the sense of an influencing variable on the desired position signal s' calculated by a controller (19) of the slip control loop (13). The clutch characteristic curve memory (25) stores the desired position signal s' as a function of the clutch moment which can be transmitted in this position and is addressed according to the instantaneous engine moment determined, for example, via an engine characteristic map (27). During a load change of the engine (1), the clutch (5) is adjusted to the expected moment before a significant change in the actual differential speed occurs. The controller (19) has an integrating controller property so that the integral portion of the desired signal s' is zero when the dimensioning of the clutch characteristic curve stored in the clutch characteristic curve memory (25) is corrected. A correcting device (33) allows step-wise correction of the characteristic curve as a function of the value of the integral portion.

Arrangement for controlling the slip of an automatic friction clutch

Growing community of inventors

Geldersheim, Germany

Hans-Joachim Schmidt-Brucken