EP 0414684 B1 19920212 - CONTROL AND REGULATING SYSTEM FOR INTERNAL COMBUSTION ENGINES
Title (en)
CONTROL AND REGULATING SYSTEM FOR INTERNAL COMBUSTION ENGINES
Publication
Application
Priority
DE 3741527 A 19871208
Abstract (en)
[origin: WO8905397A1] A control and regulating system for adjusting the air/fuel mixture of an internal combustion engine (12) comprises an oxygen probe ( lambda probe) (14) exposed to the exhaust hums of the engine (12) which emits an output signal which is an index for the air coefficient lambda . A basic memory (10) stores the fuel dosing times which are used for a preliminary control of the internal combustion engine (12) until a predetermined air coefficient lambda is obtained. A target value memory (18) stores target values of the air coefficient and a regulating device (20) corrects the fuel dosing times read in a basic memory (10) in function of the output signal measured by the lambda probe (14) and a corresponding target value read in a target value memory (18). The reciprocal of the air coefficient lambda is stored in a target value memory (18). Each fuel dosing time in a basic memory (10) is linked by multiplication to the corresponding reciprocal of the air coefficient lambda read in a target value memory (18). A conversion device (16) converts the output signal to a corresponding reciprocal of the air coefficient lambda by means of a relation characteristic of the probe and known at least approximately between the output signal of the lambda probe (14) and the air coefficent lambda . By taking into account the linear relation between the reciprocal of the air coefficent lambda and the quantity of fuel (fuel dosing time), rapid and precise regulation is achieved by means of a simple linear regulating device.
IPC 1-7
IPC 8 full level
F02D 41/14 (2006.01); F02D 41/24 (2006.01); F02D 41/26 (2006.01); F02D 45/00 (2006.01)
CPC (source: EP KR US)
F02D 41/14 (2013.01 - KR); F02D 41/1402 (2013.01 - EP US); F02D 41/2496 (2013.01 - EP US); F02D 41/26 (2013.01 - KR)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 8905397 A1 19890615; DE 3741527 A1 19890622; DE 3868416 D1 19920326; EP 0414684 A1 19910306; EP 0414684 B1 19920212; JP H03502952 A 19910704; KR 0121315 B1 19971124; KR 900700738 A 19900816; US 5040513 A 19910820
DOCDB simple family (application)
DE 8800679 W 19881103; DE 3741527 A 19871208; DE 3868416 T 19881103; EP 88909290 A 19881103; JP 50859088 A 19881103; KR 890701459 A 19890803; US 49930190 A 19900514