Title:
METHOD OF DETECTING POSITION
Document Type and Number:
Japanese Patent JPS61145406
Kind Code:
A
Abstract:
A method is disclosed for detecting an extreme value position of a movable part by means of a position detecting sensor. The method is especially suitable for detecting the idle position of the throttle flap of an internal combustion engine with the aid of a potentiometer. In this method, a stored value (extreme value) corresponding to the extreme position is corrected upon the detection of deviating measured values, provided that the deviating measured values lie within a correction range around the extreme value. The range of movement of the movable part has to lie within the range coverable by the position sensor. After a predetermined number of identical measured values are sensed in the correction range during an operating cycle, such a measured value is stored in memory as the new extreme value. For dynamic adaptation, this next extreme value is modified cyclically, preferably prior to each operating cycle, by a predetermined value away from the outermost position. While detecting the extreme position with a high accuracy, the method of the invention has a very small hysteresis, with the full function capability being restored after a short period, even under irregular operating conditions.
Inventors:
RORUFU KOORAA
GIYUNTAA PURATSUPU
GIYUNTAA PURATSUPU
Application Number:
JP26162785A
Publication Date:
July 03, 1986
Filing Date:
November 22, 1985
Export Citation:
Assignee:
BOSCH GMBH ROBERT
International Classes:
F02D41/08; F02D35/00; F02D41/24; F02D41/28; F02D45/00; G01B21/00; F02B1/04; (IPC1-7): F02D45/00; G01B21/00
Attorney, Agent or Firm:
Taku Kato