Patent US5646733A successfully refreshed from Google Patents.
Patent EP0886050A2 successfully refreshed from Google Patents.
EP0886050A2
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Compression-ignition type engine
Assignee: Toyota Motor Corp
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Filing: 1998-06-17
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Granted: —
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Expires: 2018-06-17
Abstract
Abstract A compression-ignition type engine in which first fuel of an amount of not more than 30 percent of the maximum amount of fuel is injected in an injection timing region from about 90 degrees to about 20 degrees before top dead center of the compression stroke so that the injected fuel does not break up due to heat or burn until the top dead center of the compression stroke is substantially reached but undergoes an oxidation reaction. Next, second fuel is injected at substantially the top dead center of the compression stroke to start the combustion of the injected fuel.
Inventors
- 👤 Hiromichi Yanagihara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 17:47
CPC Classifications
F; F02; F02D; F02D33/00; F02D33/003; F02B; F02B1/00; F02B1/12; F02B3/00; F02B3/06; F02B75/00; F02B75/02; F02D41/00; F02D41/30; F02D41/3011; F02D41/3017; F02D41/3035; F02D41/38; F02D41/3809; F02D41/3818; F02D41/3827; F02D41/40; F02D41/402; F02D41/403; F02M; F02M37/00; F02M63/00; F02M63/02; F02M63/0225; F02B2275/00; F02B2275/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
A compression-ignition type engine comprising: a combustion chamber; a fuel injector injecting fuel toward the
inside of the combustion chamber; and injection control means for injecting an
amount of first fuel by which amount combustion does not
occur even if injected, in a predetermined injection
timing region of a latter half of a compression stroke
where combustion does not occur even if injected, and
causing injection of second fuel at a timing later than
the predetermined injection timing region to cause
combustion of the first fuel and the second fuel.
Claim 2
Dependent Claim
37 words
A compression-ignition type engine as set forth
in claim 1, wherein the amount of the first fuel where
combustion does not occur even with injection is not more
than 30 percent of the maximum amount of injection.
Claim 3
Dependent Claim
41 words
A compression-ignition type engine as set forth
in claim 1, wherein said predetermined injection timing
region is from about 90 degrees before top dead center of
the compression stroke to about 20 degrees before top
dead center of the compression stroke.
Claim 4
Dependent Claim
62 words
A compression-ignition type engine as set forth
in claim 3, wherein the earliest injection timing in the
predetermined injection timing region shifts toward the
bottom dead center of the compression stroke the higher
the engine speed and the latest injection timing in the
predetermined injection timing region shifts toward the
bottom dead center of the compression stroke the higher
the engine speed.
Claim 5
Dependent Claim
53 words
A compression-ignition type engine as set forth
in claim 4, wherein the earliest injection timing is near
50 degrees before top dead center of the compression
stroke when the engine speed if 600 rpm and near 90
degrees before top dead center of the compression stroke
when the engine speed is 4000 rpm.
Claim 6
Dependent Claim
67 words
A compression-ignition type engine as set forth
in claim 4, wherein the latest injection timing shifts
toward the bottom dead center of the compression stroke
the larger the ratio of the amount of the first fuel
injection to the maximum amount of injection and the
difference between the earliest injection timing and the
latest injection timing at the same engine speed becomes
smaller the larger the ratio.
Claim 7
Dependent Claim
69 words
A compression-ignition type engine as set forth
in claim 6, wherein when the amount of the first fuel
injection is 5 percent of the maximum amount of injection
and the engine speed is 600 rpm, the latest injection
timing is about 20 degrees before top dead center of the
compression stroke and the difference in injection
timings is from about 30 degrees crank angle to 40
degrees crank angle.
Claim 8
Dependent Claim
69 words
A compression-ignition type engine as set forth
in claim 6, wherein when the amount of the first fuel
injection is 10 percent of the maximum amount of
injection and the engine speed is 600 rpm, the latest
injection timing is about 30 degrees before top dead
center of the compression stroke and the difference in
injection timings is from about 20 degrees crank angle to
30 degrees crank angle.
Claim 9
Dependent Claim
69 words
A compression-ignition type engine as set forth
in claim 6, wherein when the amount of the first fuel
injection is 20 percent of the maximum amount of
injection and the engine speed is 600 rpm, the latest
injection timing is about 40 degrees before top dead
center of the compression stroke and the difference in
injection timings is from about 10 degrees crank angle to
15 degrees crank angle.
Claim 10
Dependent Claim
24 words
A compression-ignition type engine as set forth
in claim 1, wherein the first fuel injection timing is
made earlier the higher the engine speed.
Claim 11
Dependent Claim
35 words
A compression-ignition type engine as set forth
in claim 1, wherein the second fuel injection is
performed at substantially top dead center of the
compression stroke or after top dead center of the
compression stroke.
References Cited (Backward Citations)
JPH07317588A
Cited
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