EP 0137229 B1 19890614 - IGNITION TIMING CONTROL DEVICE FOR A TEST BED
Title (en)
IGNITION TIMING CONTROL DEVICE FOR A TEST BED
Publication
Application
Priority
DE 3336917 A 19831011
Abstract (en)
[origin: EP0137229A2] 1. Ignition timing control apparatus for an engine test bed, for generating ignition pulses of adjustable ignition timing with respect to a reference angle, counting pulses and a reference pulse being derived from a toothed ring coupled to the crankshaft, characterized by the following features : a) a shaping circuit (1) serves for separating the counting pulses from the reference pulse sequence and for doubling and quadrupling the counting pulses ; b) adjustment devices (9, 8) ar provided for setting the ignition timing as an ignition value corresponding to a number of counting pulses before the reference angle and for inputting the number of teeth of the toothed ring ; c) coupled to the adjustment device (9, 8) is a calculator circuit (10) for calculating the number of ignition timing pulses as the difference between the number of teeth and the ignition value, he calculator circuit (10) providing in two holding stages (11, 12) on the one hand the number of teeth and on the other hand the number of ignition timing pulses ; d) a first counter (6) is coupled to the output of the shaping circuit (1) on which the number of counting pulses is doubled ; e) the reference pulse line (3) is connected to the reset input of the first counter and to the holding stage (11) for the number of ignition timing pulses of the calculator circuit (10) ; f) the output of the first counter (6) is connected to the holding stage (12) for the number of teeth of the calculator circuit (10) ; g) both holding stages (11, 12) are connected to the preload input of the first counter (6) ; h) a D flipflop (17) is connected by means of its clock input (19) to the output of the first counter (6) ; j) an inverting output (23) of the D flipflop (17) leads back to the data input (24) ; k) two groups of transistor ignition stages (25, 27 and 26, 28) are connected on the one hand to the outputs (20, 23) and on the other hand to the inverting outputs (21, 23) of the D flipflop (17).
IPC 1-7
IPC 8 full level
F02P 5/04 (2006.01); F02P 17/00 (2006.01)
CPC (source: EP)
F02P 17/00 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0137229 A2 19850417; EP 0137229 A3 19860205; EP 0137229 B1 19890614; DE 3336917 A1 19850418; DE 3478708 D1 19890720
DOCDB simple family (application)
EP 84109698 A 19840815; DE 3336917 A 19831011; DE 3478708 T 19840815