Method and apparatus for detecting combustion variations in internal combustion engine

Patent · Tue Sep 01 00:00:00 EDT 1987

OSTI ID:6096702

Obayashi, H; Kawai, H; Ina, T; Shigematsu, T; Tokoro, S; Kahama, T

A method is described for detecting combustion variations in an internal combustion engine, comprising the steps of: detecting at least two engine rotational speeds at predetermined timings for every firing stroke in one cylinder of the engine; calculating the square of each of the detected engine rotational speeds; calculating an engine speed variation between two of the squared engine rotational speeds for every firing stroke in one cylinder of the engine; and performing a process upon the sequence of the calculated engine speed variations, thereby determining an engine combustion state by the processed result.

• Assignee: Nippon Soken, Inc., Nishio; Nippondenso Co., Ltd., Kariya
• Patent Number(s): US 4691286
• OSTI ID: 6096702
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMBUSTION CONTROL
COMPUTER CALCULATIONS
CONTROL
CONTROL EQUIPMENT
CYLINDERS
DATA PROCESSING
ENGINES
EQUIPMENT
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MOTION
PROCESSING
ROTATION
SPEED REGULATORS
TIMING PROPERTIES
VELOCITY