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EP1138900A2
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EP
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Cylinder injection type internal combustion engine and combustion control method at starting thereof
Assignee: Hitachi Ltd
•
Filing: 2001-03-23
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Granted: —
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Expires: 2021-03-23
Abstract
Abstract A cylinder injection type internal combustion engine (1) includes a fuel injection valve (10, 160, 170) for directly injecting a fuel into a cylinder and a catalyst (13a, 13b) for cleaning up an exhaust in an exhaust gas and has at least two combustion control patterns for activating rapidly the catalyst (13a, 13b). The combustion control patterns are switched over based on a temperature of the catalyst (13a, 13b). Furthermore, a stratified combustion is provided at the time of starting by making a configuration of the combustion engine (1) optimum.
Inventors
- 👤 Noburu Hitachi Ltd. Intell.Prop.Group Tokuyasu
- 👤 Toshiharu Hitachi Ltd. Intell.Prop.Group Nogi
- 👤 Takuya Hitachi Ltd. Intell.Prop.Group Shiraishi
- 👤 Youichi Hitachi Ltd. Intell.Prop.Group Iihoshi
- 👤 Minoru Hitachi Ltd. Intell.Prop.Group Ohsuga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 07:16
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/06; F02D41/062; F02D41/064; F02B; F02B17/00; F02B17/005; F02B31/00; F02B31/08; F02B31/085; F02D41/021; F02D41/0235; F02D41/024; F02D41/0245; F02D41/025; F02M; F02M61/00; F02M61/16; F02M61/18; F02M61/1806; F02M69/00; F02M69/04; F02M69/047; F02B75/00; F02B75/12; F02B2075/125; F02B2275/00; F02B2275/48; F02D2200/00; F02D2200/02; F02D2200/08; F02D2200/0802; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1446; F02D41/1454; F02D41/30; F02D41/38; F02D41/40; F02D41/402; F02D41/405; F02F; F02F1/00; F02F1/24; F02F2001/244; F02F2001/245; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
86 words
A cylinder injection type internal combustion engine (1),
comprising: a fuel injection valve (10, 160, 170) for directly injecting
a fuel into a cylinder; and a catalyst (13a, 13b) to be activated by HC in an exhaust
gas, wherein a first combustion control pattern of the engine
(1) before said catalyst (13a, 13b) satisfies a temperature
condition for enabling activation of the catalyst
(13a, 13b) with the HC in the exhaust gas is different
from a second combustion control pattern of the engine
(1) after that.
Claim 2
Dependent Claim
56 words
The cylinder injection type internal combustion engine
(1) according to claim 1, wherein said fuel injection
valve (10, 160, 170) has an air inlet (165) provided
downward from a fuel measuring section and is configured
to inject an air-fuel mixture produced by mixing the air
supplied from said inlet (165) and the fuel into the cylinder.
Claim 3
Dependent Claim
35 words
The cylinder injection type internal combustion engine
(1) according to claim 1, wherein said injection valve
(10, 160, 170) has a fuel spray pattern having low rate
of deformation for pressure changes in the cylinder.
Claim 4
Independent Claim
128 words
A method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time of
starting, the internal combustion engine (1) comprising a
catalyst (13a, 13b) to be activated by unburned HC,
wherein a combustion control pattern in which an amount
of the exhausted unburned HC is small and an exhaust gas
temperature is high is performed until said catalyst
(13a, 13b) reaches a temperature which enables the unburned
HC in the exhaust gas to be cleaned up, and another
combustion control pattern in which the exhaust gas
containing the unburned HC to be supplied to the catalyst
(13a, 13b) is exhausted is performed after said catalyst
(13a, 13b) reaches the temperature which enables the unburned
HC in the exhaust gas to be cleaned up.
Claim 5
Independent Claim
87 words
A method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time of
starting, the cylinder injection type internal combustion
engine (1) comprising a fuel injection valve (10, 160,
170) for directly injecting a fuel into a cylinder, and a
catalyst (13a, 13b) to be activated by unburned HC,
wherein there are at least two combustion control patterns
for activating rapidly said catalyst (13a, 13b),
and said combustion control patterns are switched over
based on a temperature of the catalyst (13a, 13b).
Claim 6
Independent Claim
156 words
A method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time of
starting, the engine (1) comprising a fuel injection
valve (10, 160, 170) for directly injecting a fuel into a
cylinder, and a catalyst (13a, 13b) to be activated by
unburned HC, and having a function of injecting the fuel
two times during a combustion stroke and a function of
switching over combustion control pattern based on a
cooling water temperature of the engine (1), wherein until
a temperature of the catalyst (13a, 13b) reaches a
predetermined value, if the water temperature is lower
than a predetermined temperature, the fuel is injected
one time during an intake stroke and an ignition timing
is retarded near a top dead center, and if the water temperature
is higher than the predetermined temperature,
the fuel is first injected during a compression stroke
and the next injection is performed during an expansion
stroke.
Claim 7
Independent Claim
121 words
A method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time of
starting, the engine (1) comprising a fuel injection
valve (10, 160, 170) for directly injecting a fuel into a
cylinder and a catalyst to be activated by unburned HC,
wherein until a temperature of said catalyst (13a, 13b)
reaches a predetermined value, said injection valve (10,
160, 170) injects the fuel two times during a compression
stroke and during the first half of an expansion stroke,
and after the temperature of said catalyst (13a, 13b)
reaches the predetermined value, said injection valve
(10, 160, 170) injects the fuel two times during the compression
stroke and during the latter half of the expansion
stroke.
Claim 8
Dependent Claim
42 words
The method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time
of starting according to claim 7, wherein the injection
which occurs during the first half of the expansion
stroke is further divided into two injections.
Claim 9
Dependent Claim
44 words
The method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time
of starting according to claim 4, wherein the fuel is injected
during the compression stroke and a stratified
combustion operation is conducted at the time of cranking.
Claim 10
Dependent Claim
44 words
The method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time
of starting according to claim 5, wherein the fuel is injected
during the compression stroke and a stratified
combustion operation is conducted at the time of cranking.
Claim 11
Dependent Claim
44 words
The method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time
of starting according to claim 6, wherein the fuel is injected
during the compression stroke and a stratified
combustion operation is conducted at the time of cranking.
Claim 12
Dependent Claim
44 words
The method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time
of starting according to claim 7, wherein the fuel is injected
during the compression stroke and a stratified
combustion operation is conducted at the time of cranking.
Claim 13
Dependent Claim
44 words
The method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time
of starting according to claim 8, wherein the fuel is injected
during the compression stroke and a stratified
combustion operation is conducted at the time of cranking.
Claim 14
Independent Claim
120 words
A method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time of
starting, the cylinder injection type internal combustion
engine (1) comprising a fuel injection valve (10, 160,
170) for directly injecting a fuel into a cylinder, and a
catalyst (13a, 13b) for cleaning up an exhaust gas in an
exhaust pipe (7), wherein there are two types of combustion
control patterns for rapidly activating the catalyst
(13a, 13b), and after a temperature of the catalyst (13a,
13b) reaches a predetermined value, combustion is controlled
with a combustion control pattern for activating
the catalyst (13a, 13b), and in the combustion control,
the fuel is injected two times during a compression
stroke and expansion stroke.
Claim 15
Independent Claim
122 words
A method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time of
starting, the engine (1) comprising a fuel injection
valve (10, 160, 170) for directly injecting a fuel into a
cylinder, and a catalyst (13a, 13b) for cleaning up an
unburned HC in an exhaust pipe (7), wherein when a temperature
of the catalyst (13a, 13b) is equal to or lower
than a predetermined value, a first fuel injection occurs
during a compression stroke and second fuel injection occurs
during an early stage in an expansion stroke, and
after the temperature of the catalyst (13a, 13b) reaches
the predetermined value, said second fuel injection occurs
during a middle stage in the expansion stroke or
later.
Claim 16
Dependent Claim
41 words
The method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time
of starting according to claim 7, wherein the second fuel
injection is changed in accordance with a concentration
of oxygen in the exhaust gas.
Claim 17
Dependent Claim
41 words
The method for controlling combustion of a cylinder injection
type internal combustion engine (1) at the time
of starting according to claim 14, wherein the second
fuel injection is changed in accordance with a concentration
of oxygen in the exhaust gas.
References Cited (Backward Citations)
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