Title:
FUEL COMPOSITION ESTIMATING DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JPH0560003
Kind Code:
A
Abstract:
PURPOSE: To optimally estimate alcohol concentration before start of air/fuel ratio feedback control.
CONSTITUTION: When abnormality occurs at an alcohol sensor and during idle driving (S1 to S2), alcohol concentration is forcedly changed (S7 and S11), and the alcohol concentration is estimated from a change amount of an engine revolution speed at the change (S12).
Inventors:
OTA TADAKI
Application Number:
JP21879891A
Publication Date:
March 09, 1993
Filing Date:
August 29, 1991
Export Citation:
Assignee:
NISSAN MOTOR
International Classes:
F02D19/08; F02D41/02; F02D41/22; F02D45/00; G01M15/00; G01M15/04; (IPC1-7): F02D19/08; F02D41/02; F02D41/22; F02D45/00; G01M15/00
Attorney, Agent or Firm:
Fumio Sasashima
Next Patent: JPH0560004