EP0974747A2
Expired / Lapsed
EP
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A control system for an internal combustion engine
Assignee: Toyota Motor Corp
•
Filing: 1999-07-21
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Granted: —
•
Expires: 2019-07-21
Abstract
Abstract A control system for an internal combustion engine comprising a direct cylinder fuel injection valve for directly injecting the fuel into a cylinder of an internal combustion engine. The main fuel that burns in the cylinder is injected in the latter half of the compression stroke of the cylinder, and the secondary fuel which is the ineffective fuel that does not burn in the cylinder is injected in the latter half of the exhaust stroke, the main fuel and the secondary fuel being injected toward a cavity formed in the top surface of the piston. The main fuel that is injected is deflected by the cavity to form a charge of a combustible air-fuel ratio mixture around the spark plug. When the secondary fuel is injected, the exhaust valve is opening, and the fuel that is deflected is all discharged out of the cylinder through the exhaust port. Therefore, the ineffective fuel supplied by the secondary fuel injection does not remain in the cylinder, and the output torque does not change in the combustion of the next cycle.
Inventors
- 👤 Hiroshi Tanaka
- 👤 Toshio Tanahashi
- 👤 Kenji Katoh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 12:04
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0025; F02D41/0047; F02D41/005; F02D41/0055; F01; F01N; F01N13/00; F01N13/009; F01N13/011; F01N3/00; F01N3/08; F01N3/0807; F01N3/0828; F01N3/0842; F02D41/02; F02D41/021; F02D41/0235; F02D41/027; F02D41/0275; F02D41/14; F02D41/1438; F02D41/1439; F02D41/1441; F02D41/1443; F02D41/30; F02D41/38; F02D41/40; F02D41/402; F02D41/405; F02M; F02M45/00; F02M45/02; F01N2610/00; F01N2610/03; F02D2041/389; F02D41/006; F02D41/0065; F02D41/1444; F02D41/1454; F02D41/1456; F02D41/3011; F02D41/3017; F02D41/3023; F02D41/3029; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
141 words
A control system for an internal combustion
engine comprising: a direct cylinder fuel injection valve for
directly injecting the fuel into a cylinder of an
internal combustion engine; and a fuel injection control means which
executes a main fuel injection to inject the fuel that
burns in the cylinder by controlling said direct cylinder
fuel injection valve, and further executes, as required,
a secondary fuel injection to inject the fuel that does
not burn in the cylinder during the expansion stroke or
the exhaust stroke after the main fuel injection; wherein when the secondary fuel injection is being
executed, said fuel injection control means controls the
secondary fuel injection based on the engine operating
conditions in such a manner that the fuel supplied by the
secondary fuel injection is discharged out of the
cylinder before the end of the exhaust stroke.
Claim 2
Dependent Claim
56 words
A control system for an internal combustion
engine according to claim 1, wherein said internal
combustion engine is equipped with a variable valve
timing means for varying the valve timing of the engine,
and said fuel injection control means controls the
secondary fuel injection in accordance with a change in
the valve timing of the engine.
Claim 3
Dependent Claim
59 words
A control system for an internal combustion
engine according to claim 1, wherein said fuel injection
control means controls the secondary fuel injection in
such a manner that the fuel supplied by the secondary
fuel injection rides on the flow of the exhaust gas that
is formed in the cylinder in the exhaust stroke heading
toward the exhaust port.
Claim 4
Dependent Claim
118 words
A control system for an internal combustion
engine comprising: a direct cylinder fuel injection valve for
directly injecting the fuel into a cylinder of an
internal combustion engine; and a fuel injection control means which
executes a main fuel injection to inject the fuel that
burns in the cylinder by controlling said direct cylinder
fuel injection valve, and executes, as required, a
secondary fuel injection to inject the fuel that does not
burn in the cylinder during the expansion stroke or the
exhaust stroke after the main fuel injection; wherein said fuel injection control means advances
the timing for injecting the secondary fuel with an
increase in the amount of the fuel injected by the
secondary fuel injection.
Claim 5
Dependent Claim
112 words
A control system for an internal combustion
engine comprising: a direct cylinder fuel injection valve for
directly injecting the fuel into a cylinder of an
internal combustion engine; a fuel injection control means which
executes a main fuel injection to inject the fuel that
burns in the cylinder by controlling said direct cylinder
fuel injection valve, and executes, as required, a
secondary fuel injection to inject the fuel that does not
burn in the cylinder during the expansion stroke or the
exhaust stroke after the main fuel injection; and a deflecting means for deflecting the flow
of the fuel supplied by the secondary fuel injection
toward the exhaust port of the cylinder.
Claim 6
Dependent Claim
51 words
A control system for an internal combustion
engine according to claim 5, wherein said deflecting
means has a cavity formed in the top surface of the
piston, so that the flow of fuel supplied by the
secondary fuel injection is deflected toward said exhaust
port along the surface of said cavity.
Claim 7
Dependent Claim
45 words
A control system for an internal combustion
engine according to claim 5, wherein said deflecting
means is equipped with an injection direction control
means for changing the direction of fuel injected from
the injection valve toward the exhaust port when the
secondary fuel is injected.
Claim 8
Dependent Claim
115 words
A control system for an internal combustion
engine comprising: a direct cylinder fuel injection valve for
directly injecting the fuel into a cylinder of an
internal combustion engine; and a fuel injection control means which
executes a main fuel injection to inject the fuel that
burns in the cylinder by controlling said direct cylinder
fuel injection valve, and executes, as required, a
secondary fuel injection to inject the fuel that does not
burn in the cylinder during the expansion stroke or the
exhaust stroke after the main fuel injection; wherein said fuel injection control means sets the
pressure of the secondary fuel injection at a value lower
than the pressure of the main fuel injection.
Claim 9
Dependent Claim
133 words
A control system for an internal combustion
engine comprising: a direct cylinder fuel injection valve for
directly injecting the fuel into a cylinder of an
internal combustion engine; and a fuel injection control means which
executes a main fuel injection to inject the fuel that
burns in the cylinder by controlling said direct cylinder
fuel injection valve, and executes, as required, a
secondary fuel injection to inject the fuel that does not
burn in the cylinder during the expansion stroke or the
exhaust stroke after the main fuel injection; wherein said fuel injection control means
calculates the amount of fuel remaining in the cylinder,
which is part of the fuel supplied by the preceding
secondary fuel injection, and corrects the amount of said
main fuel injection based on said remaining amount of
fuel.
Claim 10
Dependent Claim
188 words
A control system for an internal combustion
engine comprising: a direct cylinder fuel injection valve for
directly injecting the fuel into a cylinder of an
internal combustion engine; and a fuel injection control means which
executes a main fuel injection to inject the fuel that
burns in the cylinder by controlling said direct cylinder
fuel injection valve, and executes, as required, a
secondary fuel injection to inject the fuel that does not
burn in the cylinder during the expansion stroke or the
exhaust stroke after the main fuel injection; wherein said fuel injection control means, as
required, executes said main fuel injection two times by
dividing it into a first main fuel injection for forming
a uniform air-fuel mixture in the cylinder and a second
main fuel injection for forming a charge of a combustible
air-fuel ratio mixture in the cylinder, and, when said
secondary fuel injection is executed, calculates the
amount of fuel remaining in the cylinder, which is part
of the fuel supplied by the preceding secondary fuel
injection, and corrects the amount of said first main
fuel injection based on the remaining amount of fuel.
Claim 11
Dependent Claim
79 words
A control system for an internal combustion
engine comprising: an ineffective fuel-supply means for
supplying ineffective fuel that does not burn in the
combustion chamber of an internal combustion engine; an EGR means for recirculating the exhaust
gas from the engine into the combustion chamber of the
engine; and an EGR limiting means for limiting the
exhaust gas recirculated by said EGR means when the
ineffective fuel is being supplied to the engine by said
ineffective fuel supply means.
Claim 12
Dependent Claim
80 words
A control system for an internal combustion
engine according to claim 11, wherein said EGR means is
equipped with an exhaust gas recirculation passage for
connecting the exhaust passage of the engine to the
intake passage of the engine and an EGR valve for
adjusting the flow rate of the exhaust gas flowing
through said exhaust gas recirculation passage, and said
EGR limiting means limits the recirculation of said
exhaust gas by controlling the opening degree of said EGR
valve.
Claim 13
Dependent Claim
73 words
A control system for an internal combustion
engine according to claim 11, wherein said internal
combustion engine is equipped with a variable valve
timing device for varying the open-close timings of the
intake valves and the exhaust valves of the cylinders,
and said EGR limiting means controls said variable valve
timing means to change the open-close timings of the
intake valves or the exhaust valves to limit the
recirculation of the exhaust gas.
Claim 14
Dependent Claim
77 words
A control system for an internal combustion
engine comprising: an ineffective fuel-supply means for
supplying ineffective fuel that does not burn in the
combustion chamber of an internal combustion engine; an EGR means for recirculating the exhaust
gas from the engine into the combustion chamber of the
engine; and an ineffective fuel limiting means for
limiting the supply of the ineffective fuel by said
ineffective fuel-supply means when the exhaust gas is
recirculated by said EGR means.
Claim 15
Dependent Claim
48 words
A control system for an internal combustion
engine according to claim 14, wherein said ineffective
fuel limiting means limits the ineffective fuel supplied
by said ineffective fuel supply means when the flow rate
of the exhaust gas recirculated by said EGR means is
larger than a predetermined amount.
Claim 16
Dependent Claim
114 words
An internal combustion engine comprising: a main fuel-supply means for supplying,
into said engine, the fuel that burns in the combustion
chamber based on the operating conditions of the internal
combustion engine; an ineffective fuel-supply means for
supplying, into said engine, the ineffective fuel that
does not burn in the combustion chamber of the engine; an EGR means for recirculating the exhaust
gas of the engine into the combustion chamber of the
engine; and a correction means for estimating the
amount of the ineffective fuel in the exhaust gas
recirculated by said EGR means to correct the amount of
fuel supplied to the engine by said main fuel-supply
means based on the estimated amount.
References Cited (Backward Citations)
No citation records indexed.
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