EP0972925A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1999-07-14
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Granted: —
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Expires: 2019-07-14
Abstract
Abstract A stable combustion without generating smoke or misfire is performed by selectively conducting a first combustion mode and a second combustion mode. In the first combustion mode, an amount of an inert gas, e.g., EGR gas, provided to a combustion chamber (5) is made to be larger than an amount of the inert gas that causes the generation amount of soot to become a peak amount. This causes substantially no soot to be generated. In the second combustion mode, the amount of the inert gas provided to the combustion chamber (5) is made to be smaller than the amount that causes the generation amount of soot to become a peak amount. The injection timing is quickened if the injection amount is increased in the first combustion mode, and the injection timing is delayed if the injection amount is reduced.
Inventors
- 👤 Masato Gotoh
- 👤 Shizuo Sasaki
- 👤 Kouji Yoshizaki
- 👤 Takekazu Ito
- 👤 Hiroki Murata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 10:45
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F02D41/0007; F02D41/0025; F02D41/0047; F02D41/005; F02D41/0057; F02D41/30; F02D41/38; F02D41/40; F02M; F02M26/00; F02M26/13; F02M26/14; F02M26/15; F02B; F02B29/00; F02B29/04; F02B29/0406; F02M2026/001; F02M2026/009; F02M26/02; F02M26/04; F02M26/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
141 words
An internal combustion engine in which a generation amount of soot
increases to a peak amount when increasing an amount of an inert gas supplied to a
combustion chamber (5), the engine comprising at least one said combustion chamber
(5) and an engine control system (40) that: controls an amount of an intake air supplied to the combustion chamber
(5); controls an amount of an inert gas so as to make the amount of the inert
gas supplied to the combustion chamber (5) more than an amount of the inert gas that
causes the generation amount of soot to become the peak amount; determines an injection amount and a timing for injecting a fuel to the
combustion chamber (5) in accordance with an operation state of the engine; and adjusts the fuel injection timing when the fuel injection amount is
changed.
Claim 2
Dependent Claim
31 words
An internal combustion engine according to claim 1, wherein the control
system (40) adjusts the fuel injection timing by quickening the fuel injection timing
when the fuel injection amount is increased.
Claim 3
Dependent Claim
37 words
An internal combustion engine according to claim 2, wherein the control
system (40) adjusts the fuel injection timing by quickening the fuel injection timing by
advancing a predetermined crank angle when the fuel injection amount is increased.
Claim 4
Dependent Claim
31 words
An internal combustion engine according to claim 1, wherein the control
system (40) adjusts the fuel injection timing by delaying the fuel injection timing when
the fuel injection amount is reduced.
Claim 5
Dependent Claim
36 words
An internal combustion engine according to claim 4, wherein the control
system (40) adjusts the fuel injection timing by delaying the fuel injection timing by a
fixed crank angle when the fuel injection amount is reduced.
Claim 6
Dependent Claim
45 words
An internal combustion engine according to claim 1, further comprising
a memory that stores standard injection timing data in accordance with a required load
and an engine speed, wherein said control system (40) determines the fuel injection
timing based on the standard injection timing data.
Claim 7
Dependent Claim
73 words
An internal combustion engine according to claim 6, further comprising
a detector (27, 60, 61, 62, 64) that detects a value of an operation parameter of the
engine which influences a temperature of the fuel and a surrounding gas during
combustion within the combustion chamber (5), wherein said control system (40)
determines the fuel injection timing by correcting the standard injection timing data in
accordance with the detected value of the operation parameter.
Claim 8
Dependent Claim
32 words
An internal combustion engine according to claim 7, wherein the
operation parameter is an air fuel ratio, and the standard injection timing data is delayed
as the air fuel ratio is increased.
Claim 9
Dependent Claim
58 words
An internal combustion engine according to claim 7, further comprising
a recirculation device (29,30) that recirculates an exhaust gas discharged from the
combustion chamber (5) into an engine intake passage (17), wherein said operation
parameter is an exhaust gas recirculation rate and the standard injection timing data is
quickened as the detected exhaust gas recirculation rate is increased.
Claim 10
Dependent Claim
43 words
An internal combustion engine according to claim 7, wherein said
operation parameter is a temperature of an intake gas supplied to the combustion
chamber (5) and the standard injection timing data is delayed as the detected
temperature of the intake gas is increased.
Claim 11
Dependent Claim
38 words
An internal combustion engine according to claim 7, wherein said
operation parameter is a pressure within the intake passage (17) and the standard
injection timing data is delayed as the detected pressure within the intake passage is
increased.
Claim 12
Dependent Claim
39 words
An internal combustion engine according to claim 7, wherein said
operation parameter is a temperature of an engine cooling water and the standard
injection timing data is delayed as the detected temperature of the engine cooling water
is increased.
Claim 13
Dependent Claim
37 words
An internal combustion engine according to claim 7, wherein said
operation parameter is a humidity of an intake air and the standard injection timing data
is quickened as the detected humidity of the intake air is increased.
Claim 14
Dependent Claim
46 words
An internal combustion engine according to claim 1, further comprising
a recirculation device that recirculates an exhaust gas discharged from the combustion
chamber (5), wherein said inert gas includes the recirculated exhaust gas, and wherein
an exhaust gas recirculation rate is approximately 55 % or greater.
Claim 15
Dependent Claim
25 words
An internal combustion engine according to claim 1, wherein a catalyst
(25) having an oxidation function is arranged within the engine exhaust gas passage
(24).
Claim 16
Dependent Claim
103 words
An internal combustion engine according to claim 1, wherein said
control system (40) selectively switches between a first combustion mode in which an
amount of the inert gas supplied to the combustion chamber (5) is more than the amount
of the inert gas that causes the generation amount of soot to become the peak amount
and in which substantially no soot is generated, and a second combustion mode in
which an amount of the inert gas supplied to the combustion chamber (5) is smaller than
the amount of the inert gas tat causes the generation amount of soot to become the peak
amount.
Claim 17
Dependent Claim
85 words
An internal combustion engine according to claim 16, wherein said
control system (40) also controls an amount of an intake gas supplied to the combustion
chamber (5); and further comprising: a detector (26) that detects an amount of an intake air supplied to the
combustion chamber (5), wherein the intake gas amount is controlled based on the required load
and the engine speed, and the fuel injection amount is controlled based on the intake air
amount detected by the detector during the first combustion mode.
Claim 18
Dependent Claim
23 words
An internal combustion engine according to claim 16, wherein, at start
of the engine, the control system (40) performs the first combustion mode.
Claim 19
Dependent Claim
32 words
An internal combustion engine according to claim 18, wherein, in a
cranking state of the engine at start of the engine, the fuel injection timing is adjusted by
advancing a crank angle.
Claim 20
Dependent Claim
51 words
An internal combustion engine according to claim 18, wherein, from a
cranking of an engine at the start thereof to warm up of a catalyst (25) having an
oxidation function and arranged within the engine exhaust passage, the fuel injection
timing is adjusted to be delayed by retarding a crank angle.
Claim 21
Dependent Claim
126 words
An internal combustion engine according to claim 1, further comprising: a combustion pressure sensor for detecting the combustion pressure
within the combustion chamber (5); and wherein the control system (40) determines, based on the combustion pressure
detected by the combustion pressure sensor, whether or not a smoke or a noise equal to
or more than a fixed level is generated, or whether or not a deficient combustion is
generated, wherein the fuel injection timing is delayed or the air fuel ratio is
reduced when it is determined that smoke or the noise equal to or more than the fixed
level is generated, and the fuel injection timing is quickened or the air fuel ratio is raised
when it is determined that the deficient combustion is generated
References Cited (Backward Citations)
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