Ignition timing control system for internal combustion engine

Internal-combustion engines – Charge forming device – Fuel injection system

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

123421, 123425, F02P 5152

Patent

active

058456201

ABSTRACT:
An ignition timing control system for an internal combustion engine that estimates the octane number of the fuel being used based on the state of engine combustion knocking and controls the ignition timing to a value not exceeding the knocking limit. The basic ignition timing is set along the knocking limit of fuel having least octane number and the maximum advance amount is set between the knocking limit and the second knocking limit of fuel having maximum octane number. Octane number is estimated from the occurrence of knocking. On the other hand, upper limit of the estimated octane number is set based on the MBT of the engine such that the estimated octane number is limited with the upper limit. Advance rate is determined based on the estimated octane number and is multiplied to the maximum advance amount to determine an ignition timing correction amount. The ignition timing is finally determined from the basic ignition timing and the ignition timing correction amount. A learning control is conducted for the octane number estimated and the estimated octane number is limited within the learned value.

REFERENCES:
patent: 4594982 (1986-06-01), Takahashi et al.
patent: 5000149 (1991-03-01), Miyama
patent: 5012782 (1991-05-01), Tokuda
Patent Abstracts of Japan, vol. 11, No. 323 (M-634), Oct. 21, 1987, JP 62-107274, May 18, 1987 (Yoshihisa).
Patent Abstracts of Japan, vol. 16, No. 328 (M-1281), Jul. 16, 1992, JP 4-94460, Mar. 26, 1992 (Masaki et al).
Patent Abstracts of Japan, vol. 16, No. 107 (M-1222), Mar. 17, 1992, JP 3-279651, Mar. 28, 1990 (Masanobu).
Patent Abstracts of Japan, vol. 16, No. 339 (M-1284), Jul. 22, 1992, JP 4-101067, Aug. 11, 1990 (Yukio et al).
Patent Abstracts of Japan, vol. 15, No. 35 (M-1074), Jan. 28, 1991, JP 2-275043, Apr. 18, 1989 (Kishiyu).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Ignition timing control system for internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ignition timing control system for internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ignition timing control system for internal combustion engine will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-168492

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.