Internal-combustion engines – Engine speed regulator – Idle speed control
Patent
1990-08-16
1991-08-13
Wolfe, Willis R.
Internal-combustion engines
Engine speed regulator
Idle speed control
123399, F02D 910, F02D 4108
Patent
active
050387332
ABSTRACT:
A load adjustment device, by which the power of an internal combustion engine can be regulated, has a driver (4) which is coupled to an accelerator pedal (1) and cooperates via a regulating element with a setting member (9) which determines the output of the internal combustion engine. The setting member has a first regulating-element part (8a) and a second regulating-element part (8b) which can be disconnected from each other in order, in this way, to be able to control the setting member (9) independently of the driver (4) via an electric setting drive (14). Within the second regulating-element part (8b) there is contained, in accordance with the invention, a step-up device (torque converters 30a, 30b) for the setting-drive-side movement. An emergency operation spring (20) urges the second regulating-element part (8b) in the direction of maximum idle position into an emergency idle position, and produces, upon failure of the electric setting drive (14) or of a control device (17) which electronically controls the load adjustment device, a transfer of the setting member (9) into an emergency idle position. An auxiliary spring (31) which is pre-tensioned in the direction of minimum idle position over the entire idle control range, provides assurance that a friction/detent moment of the currentless electric setting drive can be overcome.
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Farber Martin A.
VDO Adolf Schindling AG
Wolfe Willis R.
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