Title:
INTAKE SYSTEM TROUBLE JUDGING DEVICE IN ENGINE
Document Type and Number:
Japanese Patent JP3047589
Kind Code:
B2
Abstract:
PURPOSE: To judge abnormal condition in an intake system while judging whether the condition is caused by intake air leak due to shipping out of vac uum hose, or deterioration of an air from meter.
CONSTITUTION: Two diagnostic operation range are set on the basis of an engine rotational number N and intake negative pressure P (S3, S6), and the detected value and the reference value of an air flow meter are compared with each other in each operation range (S9, S11) so as to judge abnormal condition of an intake system on the basis of its compared result (S10, S12 to S14).
More Like This:
Inventors:
Hiroshi Yukinari
Mitsuru Kasatsugu
Mitsuru Kasatsugu
Application Number:
JP511192A
Publication Date:
May 29, 2000
Filing Date:
January 14, 1992
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F02D41/18; F02D41/22; F02D45/00; (IPC1-7): F02D45/00; F02D41/18; F02D41/22
Domestic Patent References:
| JP2305348A | ||||
| JP323347A | ||||
| JP2145648U |
Attorney, Agent or Firm:
Fujio Sasashima