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Title: Method and system for reducing engine knock in an internal combustion engine

Abstract

An antiknock system for an internal combustion engine having a fuel system and a spark ignition system is described, said antiknock system comprising: means for detecting engine vibration and for generating a vibration output signal representative of the magnitude of the engine vibration over a predetermined frequency spectrum, means for integrating said vibration output signal over said frequency spectrum multiplied by a first weight factor to obtain a first value, means for integrating said vibration output signal over frequency spectrum multiplied by a second weight factor to obtain a second value, wherein said first weight factor has a greater average value in a first frequency range of said frequency spectrum than said second weight factor while said second weight factor has a greater average value in a second frequency range of said frequency spectrum than said first weight factor, means for comparing said first value with a first threshold value and generating a fuel control output signal when said first value exceeds said first threshold, means for comparing said second value with a second threshold value and generating a spark ignition control output signal when said second value exceeds said second threshold, means for varying the rate of fuel deliverymore » by the fuel system as a function of said fuel control output signal, and means for varying ignition timing of the spark ignition system as a function of said spark ignition control output signal.« less

Inventors:
Publication Date:
OSTI Identifier:
6495166
Patent Number(s):
US 5215059; A
Application Number:
PPN: US 7-863088
Assignee:
Hitachi America, Ltd., Tarrytown, NY (United States)
Resource Type:
Patent
Resource Relation:
Patent File Date: 3 Apr 1992
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; INTERNAL COMBUSTION ENGINES; DESIGN; KNOCK CONTROL; COMBUSTION; FUEL-AIR RATIO; MECHANICAL VIBRATIONS; CHEMICAL REACTIONS; CONTROL; ENGINES; HEAT ENGINES; OXIDATION; THERMOCHEMICAL PROCESSES; 330101* - Internal Combustion Engines- Spark-Ignition; 330603 - Vehicle Design Factors- Engine System

Citation Formats

Kaneyasu, Masayoshi. Method and system for reducing engine knock in an internal combustion engine. United States: N. p., 1993. Web.
Kaneyasu, Masayoshi. Method and system for reducing engine knock in an internal combustion engine. United States.
Kaneyasu, Masayoshi. 1993. "Method and system for reducing engine knock in an internal combustion engine". United States.
@article{osti_6495166,
title = {Method and system for reducing engine knock in an internal combustion engine},
author = {Kaneyasu, Masayoshi},
abstractNote = {An antiknock system for an internal combustion engine having a fuel system and a spark ignition system is described, said antiknock system comprising: means for detecting engine vibration and for generating a vibration output signal representative of the magnitude of the engine vibration over a predetermined frequency spectrum, means for integrating said vibration output signal over said frequency spectrum multiplied by a first weight factor to obtain a first value, means for integrating said vibration output signal over frequency spectrum multiplied by a second weight factor to obtain a second value, wherein said first weight factor has a greater average value in a first frequency range of said frequency spectrum than said second weight factor while said second weight factor has a greater average value in a second frequency range of said frequency spectrum than said first weight factor, means for comparing said first value with a first threshold value and generating a fuel control output signal when said first value exceeds said first threshold, means for comparing said second value with a second threshold value and generating a spark ignition control output signal when said second value exceeds said second threshold, means for varying the rate of fuel delivery by the fuel system as a function of said fuel control output signal, and means for varying ignition timing of the spark ignition system as a function of said spark ignition control output signal.},
doi = {},
url = {https://www.osti.gov/biblio/6495166}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 01 00:00:00 EDT 1993},
month = {Tue Jun 01 00:00:00 EDT 1993}
}