F - Mech Eng,Light,Heat,Weapons – 02 – P
Patent
F - Mech Eng,Light,Heat,Weapons
02
P
317/5.35
F02P 5/04 (2006.01) F02P 3/045 (2006.01)
Patent
CA 1142575
-1- Abstract Digital dwell circuitry for a spark and dwell igni- tion control system is disclosed. Maximum advance and reference sensors are utilized to produce pulse transi- tions which determine positions of maximum and minimum possible advance for spark ignition with respect to the position of the engine crankshaft. For each maximum advance sensor pulse transition a main counter starts a sequential running count of speed independent clock pulses wherein the maximum count obtained by the counter is related to engine crankshaft speed. The running and maximum counts of the main counter are utilized by dwell circuitry to determine the time prior to the next maximum advance pulse at which spark coil excitation should occur. The main counter running count also determines several inputs to a read only memory (ROM) circuit whose output controls a rate multiplier. The rate multiplier receives input clock signals, provides selective fre- quency division for these clock signals in accordance with the ROM output, and the output of the rate multi- plier is coupled to an accumulator means whose accumu- lated count is utilized to determine the occurrence of spark ignition by terminating spark coil excitation.
353280
Gowling Lafleur Henderson Llp
Motorola Inc.
LandOfFree
Digital dwell circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital dwell circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital dwell circuit will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-816704