EP0879955A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Transient control between two spark-ignited combustion states in engine
Assignee: Nissan Motor Co Ltd
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Filing: 1998-05-20
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Granted: —
•
Expires: 2018-05-20
Abstract
Abstract What is disclosed is a vehicle engine control system responsive to a change between a first request for homogeneous charge combustion and a second request for stratified charge combustion. A spark-ignition cylinder-injection internal combustion engine has cylinders, each performing an intake phase, a compression phase, a power phase, and an exhaust phase. The cylinders each, when rendered operable in a first mode, experience first fuel injection at a first fuel injection timing during intake phase thereof and first spark ignition at a first ignition timing to initiate homogeneous charge combustion. The cylinders each, when rendered operable in a second mode, experiences second fuel injection at a second fuel injection timing during compression phase and second spark ignition at a second ignition timing to initiate stratified charge combustion. A fuel injection manager is operable to set one of the first fuel injection and second fuel injection for the cylinders in a predetermined sequential order in response to one of the first and second request. A spark ignition manager is operable to set one of the first spark ignition and second spark ignition for the cylinders in the predetermined sequential order in response to one of the first fuel injection and the second fuel injection that has been set to each of the cylinders.
Inventors
- 👤 Yuki Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 17:48
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/008; F02B; F02B17/00; F02B17/005; F02D37/00; F02D37/02; F02D41/0025; F02D41/0047; F02D41/005; F02D41/0057; F02D41/30; F02D41/3011; F02D41/3017; F02D41/3023; F02D41/3029; F02D41/3064; F02P; F02P5/00; F02P5/04; F02P5/045; F02P5/145; F02P5/15; F02P5/1502; F02P5/1504; F02P5/1506; F02P5/1512; F02B75/00; F02B75/12; F02B2075/125; F02B23/00; F02B23/08; F02B23/10; F02B23/104; F02D41/24; F02D41/2406; F02D41/2409; F02D41/2422; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
215 words
A vehicle engine control system responsive to a change
between a first request for homogeneous chase combustion
and a second request for stratified chase combustion, said
vehicle engine control system comprising: a spark-ignition cylinder-injection internal combustion
engine having cylinders, each performing on intake phase, a
compression phase, a power phase, and an exhaust phase; said cylinders each, when rendered operable in a first
mode, experiencing first fuel injection at a first fuel injection
timing during intake phase thereof and first spark ignition at a
first ignition timing to initiate homogeneous charge
combustion; said cylinders each, when rendered operable in a second
mode, experiencing second fuel injection at a second fuel
injection timing during compression phase and second spark
ignition at a second ignition timing to initiate stratified charge
combustion; a fuel injection manager being operable to set one of
said first fuel injection and second fuel injection for said
cylinders in a predetermined sequential order in response to
one of the first and second request; and a spark ignition manager being openable to set one of
said first spark ignition and second spark ignition for said
cylinders in the predetermined sequential order in response to
one of said first fuel injection and said second fuel injection
that has been set to each of said cylinders.
Claim 2
Dependent Claim
54 words
A vehicle engine control system as claimed in claim 1,
wherein said spark ignition manager is operable to set, for
said cylinders one after another, said first ignition timing in
the presence of execution of said first fuel injection and said
second ignition timing in the absence of execution of said first
fuel injection.
Claim 3
Dependent Claim
162 words
A vehicle engine control system as claimed in claim 1, wherein said fuel injection manager is operable to set,
for said cylinders one after another, said first fuel injection
timing and said second fuel injection timing; wherein, for one of said cylinders, said fuel injection
manager is operable to command execution of said first fuel
injection at said first fuel injection timing when said first fuel
injection has been set to said one cylinder and avoid second
fuel injection at said second fuel injection timing in the
presence of immediately preceding execution of said first fuel
injection; and wherein, for one of said cylinders, said fuel injection
manager is operable to avoid execution of said first fuel
injection at said first fuel injection timing when said second
fuel injection has been set to said one cylinder and command
execution of said second fuel injection at said second fuel
injection timing in the absence of immediately preceding
execution of said first fuel injection.
Claim 4
Dependent Claim
60 words
A vehicle engine control system as claimed in claim 1, wherein, for one of said cylinders, said fuel injection
manager is operable to compute first fuel injection quantity
for said first fuel injection when said first fuel injection has
been set and compute second fuel injection quantity for said
second fuel injection when said second fuel injection has been
set.
Claim 5
Dependent Claim
91 words
A vehicle engine control system as claimed in claim 4, wherein, for one of said cylinders, said fuel injection
manager is operable to hold the last value resulting from
computing first fuel injection after a change from said first
fuel injection to said second fuel injection that is set to said
one cylinder; and said fuel injection manager is operable to
hold the last value resulting from computing second fuel
injection after a change from said second fuel injection to said
first fuel injection that is set to said one cylinder.
Claim 6
Dependent Claim
48 words
A vehicle engine control system as claimed in claim 1, wherein, for one of said cylinders, said spark ignition
manager is operable to compute fiat ignition timing when said
first fuel injection has been set and compute second ignition
timing when said second fuel injection has been set.
Claim 7
Dependent Claim
91 words
A vehicle engine control system as claimed in claim 6, wherein, for one of said cylinders, said spark ignition
manager is operable to hold the last value resulting from
computing first ignition timing after a change from said first
fuel injection to said second fuel injection that is set to said
one cylinder; and said spark ignition manager is operable to
hold the last value resulting from computing second ignition
timing after a change from said second fuel injection to said
first fuel injection that is set to said one cylinder.
Claim 8
Dependent Claim
26 words
A vehicle engine control system as claimed in claim 6,
wherein said spark ignition manager is operable to compute
MBT in determining said fiat ignition timing.
Claim 9
Dependent Claim
27 words
A vehicle engine control system as claimed in claim 6,
wherein said spark ignition manager is operable to refer to
map in determining said second ignition timing
Claim 10
Dependent Claim
54 words
A vehicle engine control system as claimed in claim 1,
wherein said spark ignition manager is operable to advance
timing to initiate supply of electric current to ignition coil for
production of spark in response to the change between the
first request for homogeneous charge combustion and the
second request for stratified charge combustion.
Claim 11
Dependent Claim
55 words
A vehicle engine control system as claimed in claim 1,
wherein said spark ignition manager is operable to advance
timing to initiate supply of electric current to ignition coil for
production of spark in response to only a change to the first
request for homogeneous charge combustion from the second
request for stratified charge combustion,
Claim 12
Dependent Claim
68 words
A vehicle engine control system as claimed in claim 10,
wherein said spark ignition manager is operable to maintain
control to advance timing to initiate supply of electric current
to the ignition coil over interval beginning with the change
between the first request for homogeneous charge combustion
and the second request for stratified charge combustion and
ending with setting of ignition timing for new request after the
change.
Claim 13
Dependent Claim
68 words
A vehicle engine control system as claimed in claim 11,
wherein said spark ignition manager is operable to maintain
control to advance timing to initiate supply of electric current
to the ignition coil over interval beginning with the change to
the first request for homogeneous charge combustion from
the second request for stratified charge combustion and
ending with setting of ignition timing for new request after the
change.
Claim 14
Dependent Claim
89 words
A vehicle engine control system as claimed in claim 10,
wherein said spark ignition manager is operable to compute
dwell angle and increase said computed dwell angle by a spark
advance limit, and said spark ignition manager uses said
increased dwell angle to advance timing to initiate supply of
electric current to the ignition coil, and wherein said spark
ignition manager is operable to modify said spark advance in
response to the change between the first request for
homogeneous charge combustion and the second request for
stratified charge combustion.
Claim 15
Dependent Claim
21 words
A vehicle engine control system as claimed in claim 14,
wherein said spark advance limit is variable depending upon
engine speed.
Claim 16
Dependent Claim
37 words
A vehicle engine control system as claimed in claim 14,
wherein said spark advance limit that is used to increase the
computed dwell angle is a function of a difference between
said first and second ignition timings.
Claim 17
Dependent Claim
58 words
A vehicle engine control system as claimed in claim 10,
wherein said spark advance manager is operable to lift
restrain imposed by an advance limit and a retard limit to
allow determination of ignition timing, without said restraint,
immediately after the change between the first request for
homogeneous charge combustion and the second request for
stratified charge combustion.
References Cited (Backward Citations)
No citation records indexed.
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