Patent US2021494A successfully refreshed from Google Patents.
EP0849458A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus and method for controlling combustion in internal combustion engines
Assignee: Toyota Motor Corp
•
Filing: 1997-12-17
•
Granted: —
•
Expires: 2017-12-17
Abstract
Abstract An internal combustion engine and method of engine control that selectively shifts the combustion mode carried out in its cylinder between stratified charge combustion and homogeneous charge combustion. A fuel supply device supplies the cylinder with fuel. A condition detecting device detects the operating conditions of the engine. A mode determining device determines the preferred combustion mode in accordance with the detected operating conditions. If the mode determining device determines that homogeneous charge combustion is to be performed, a first controller sets a first fuel supply amount and controls the fuel supplying device accordingly so that the engine torque fluctuation approaches a predetermined target value. If the determining device determines that stratified charge combustion is to be performed, a second controller sets a second fuel supply amount and controls the fuel supplying device accordingly so that the engine torque fluctuation approaches a predetermined target value. This permits smooth fuel control and prevents torque shocks.
Inventors
- 👤 Hiroyuki Mizuno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 07:09
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/3011; F02D41/3017; F02D41/3023; F02D41/3029; F02D41/02; F02D41/14; F02D41/1497; F02D41/1498; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
170 words
An internal combustion engine having a cylinder (5),
wherein the engine selectively operates in a stratified
charge combustion mode and a lean homogeneous charge
combustion mode to burn fuel in the cylinder (5), the engine
being characterized by: a fuel supply device (11) for supplying the fuel into
the cylinder (5); an output fluctuation detector (27, 28) for detecting
fluctuations in the output rotation of the engine; determining device (30) for determining which
combustion mode is being performed; a controller (30) for establishing a first fuel supply
amount to cause the output fluctuation of the engine to
approach a predetermined target value when the determination
result indicates lean homogeneous charge combustion and for
controlling the fuel supply device in accordance with the
first fuel supply amount; and wherein the controller (30) establishes a second fuel
supply amount in accordance with the first fuel supply
amount when the determination result indicates stratified
charge combustion and, wherein the controller controls the
fuel supply device in accordance with the second fuel supply
amount.
Claim 2
Dependent Claim
42 words
The engine according to Claim 1, wherein the fuel
supply device is a fuel injector (11) for injecting the fuel
into the cylinder (5), and wherein the first and second fuel
supply amounts are first and second amounts of fuel
injection, respectively.
Claim 3
Dependent Claim
29 words
The engine according to Claim 1 or 2 including an
acceleration pedal (24) and a pedal angle detector (26A) for
detecting the degree of depression of the acceleration
pedal.
Claim 4
Dependent Claim
19 words
The engine according to any one of Claims 1 to 3,
wherein the engine output fluctuation is torque fluctuation.
Claim 5
Dependent Claim
25 words
The engine according to Claim 2, wherein the controller
(30) establishes the first fuel injection amount by varying
a predetermined basic amount of fuel injection.
Claim 6
Dependent Claim
34 words
The engine according to Claim 5, wherein the controller
(30) establishes the second fuel injection amount by
increasing the basic amount when the first fuel injection
amount is established by increasing the basic amount.
Claim 7
Dependent Claim
34 words
The engine according to Claim 5, wherein the controller
(30) establishes the second fuel injection amount by
decreasing the basic amount when the first fuel injection
amount is established by decreasing the basic amount.
Claim 8
Dependent Claim
28 words
The engine according to Claim 5, wherein the second
fuel injection amount is calculated by correcting the basic
amount of fuel injection with first and second correction
coefficients.
Claim 9
Dependent Claim
37 words
The engine according to Claim 8, wherein the first
correction coefficient (KLMT) varies in accordance with the
torque fluctuation of the engine and the second correction
coefficient (KQ f ) varies in accordance with the basic
amount.
Claim 10
Independent Claim
108 words
A method for controlling delivery of fuel to a cylinder
of an engine by selectively operating the engine in a
stratified charge combustion mode and a lean homogeneous
charge combustion mode, the method being characterized by
the steps of: detecting operating conditions of the engine; selecting a combustion mode in accordance with the
detected operating conditions; establishing and delivering a first fuel supply amount
to cause an output fluctuation of the engine to approach a
predetermined target value when homogeneous charge
combustion is being performed; and establishing and delivering a second fuel supply amount
in accordance with the first fuel amount when stratified
charge combustion is being performed.
Claim 11
Dependent Claim
25 words
The method according to Claim 10, wherein the degree of
depression of an acceleration pedal and the engine speed are
detected during the detecting step.
Claim 12
Dependent Claim
24 words
The method according to Claim 10, including the step of
detecting torque fluctuation of the engine, wherein the
torque fluctuation is the output fluctuation.
Claim 13
Dependent Claim
23 words
The method according to Claim 10, wherein the first
fuel supply amount is established by varying a predetermined
basic amount of fuel supply.
Claim 14
Dependent Claim
32 words
The method according to Claim 13, wherein the second
fuel supply amount is established by increasing the basic
amount when the first fuel supply amount is established by
increasing the basic amount.
Claim 15
Dependent Claim
32 words
The method according to Claim 13, wherein the second
fuel supply amount is established by decreasing the basic
amount when the first fuel supply amount is established by
decreasing the basic amount.
Claim 16
Dependent Claim
23 words
The method according to Claim 13, wherein the second
fuel supply amount is calculated by using correction
coefficients when correcting the basic amount.
Claim 17
Dependent Claim
47 words
The method according to Claim 16, wherein the
correction coefficients include first and second correction
coefficients, wherein the first correction coefficient
(KLMT) varies in accordance with the output fluctuation of
the engine and the second correction coefficient (KQ f )
varies in accordance with the basic amount.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.