EP0882877A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Controller for an internal combustion engine
Assignee: Nissan Motor Co Ltd
•
Filing: 1998-05-29
•
Granted: —
•
Expires: 2018-05-29
Abstract
Abstract The invention stabilizes combustion performance upon a change from operation with stratified combustion to operation with homogeneous combustion. The lower limit for the equivalence ratio just after a change from operation with stratified combustion to operation with homogeneous combustion is set at a value greater than set under steady conditions so as to avoid adverse influence of residual external and internal EGR (exhaust gas recirculation). <IMAGE>
Inventors
- 👤 Takahiro Yoshino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 19:59
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/0025; F02D41/0047; F02D41/005; F02D41/0057; F02D41/0065; F02D41/0072; F02B; F02B17/00; F02B17/005; F02B75/00; F02B75/12; F02B2075/125; F02D41/30; F02D41/38; F02D2041/389; F02D41/3011; F02D41/3017; F02D41/3023; F02D41/3064; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
74 words
A controller for an internal combustion engine
having a cylinder and an injector to inject fuel directly
into the cylinder, the controller comprising: a discriminating section to detect a change of
combustion in the cylinder from stratified combustion to
homogeneous combustion; a section to calculate a ratio between air and fuel
for the cylinder; and a limiter to limit the ratio in a range when the
change of combustion in the cylinder is detected.
Claim 2
Dependent Claim
21 words
A controller as set forth in claim 1, wherein
said range is different from a range used during steady-state
homogeneous combustion.
Claim 3
Dependent Claim
34 words
A controller as set forth in claim 1, wherein
the limiter sets said range such that a minimum amount of
fuel relative to an amount of air is increased when said
change is detected.
Claim 4
Dependent Claim
28 words
A controller as set forth in claim 1, wherein
the discriminating section detects said change based on a
parameter that has been corrected for air intake system
delay.
Claim 5
Dependent Claim
51 words
A controller as set forth in claim 1, wherein
the controller further comprises: an EGR (exhaust gas recirculation) control section
to control an EGR system to perform EGR during operation
with stratified combustion and to inhibit EGR during
operation with homogeneous combustion just after a change
from operating with stratified combustion.
Claim 6
Dependent Claim
31 words
A controller as set forth in claim 1, wherein
the limiter limits said ratio based upon engine operation
conditions during operation with stratified combustion
just before said change to homogeneous combustion.
Claim 7
Dependent Claim
42 words
A controller as set forth in claim 4, wherein
the discriminating section detects said change based on a
difference between said parameter that has been corrected
for air intake system delay and said parameter not
corrected for said air intake system delay.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.