EP0204211A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A system for controlling intake pressure in a supercharged internal combustion engine
Assignee: Toyota Motor Corp
•
Filing: 1986-05-20
•
Granted: —
•
Expires: 2006-05-20
Abstract
Abstract An internal combustion engine provided with a mechanically operated supercharger in kinematic connection with a crankshaft the engine. The engine is provided with a system for controlling the effect of supercharging, such as a by-pass control valve. A timer is provided for detecting a predetermined short period after the engine is switched to an acceleration condition from the preceding deceleration condition with a fuel-cut, or after a moderate acceleration has begun. The system for controlling the effect of the supercharging is so controlled that the effect of supercharging is weakened during that period.
Inventors
- 👤 Hideo Miyagi
- 👤 Fumiaki Ohya
- 👤 Koji Fukushima
- 👤 Shin Adachi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 09:38
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F02D41/0007; F02B; F02B33/00; F02B33/44; F02B33/446; F02B39/00; F02B39/02; F02B39/12; F02D41/02; F02D41/04; F02D41/12; F02D41/123; F02D41/126; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
110 words
An intake system for a supercharged internal combustion engine, comprising: as intake line for introduction of an amount of intake air into the engine; a mechanically operated type supercharger arranged in the intake line; means for connecting the supercharger to the engine for transmitting the engine rotation to the supercharger in at least an acceleration condition of the engine; detecting means for detecting a particular kind of engine acceleration condition wherein it is required to gradually increase the effect of the supercharging, and; means, responsive to signals from the detecting means, for controlling the supercharger so that the supercharging effect is weakened when the engine is under said particular acceleration.
Claim 2
Dependent Claim
110 words
An intake system for a supercharged internal combustion engine, comprising: as intake line for introduction of an amount of intake air into the engine; a mechanically operated type supercharger arranged in the intake line; means for connecting the supercharger to the engine for transmitting the engine rotation to the supercharger in at least an acceleration condition of the engine; detecting means for detecting a particular kind of engine acceleration condition wherein it is required to gradually increase the effect of the supercharging, and; means, responsive to signals from the detecting means, for controlling the supercharger so that the supercharging effect is weakened when the engine is under said particular acceleration.
Claim 3
Dependent Claim
81 words
An intake system for and internal combustion engine according to claim 1, wherein it further comprises fuel supplying means, responsive to the operating conditions of the engine, for controlling the supply of the fuel into the engine, and said detecting means detect a period adjacent to a switching area to a fuel supply condition wherein the fuel supplying means operate to supply fuel from a fuel cut condition wherein the fuel supply means operate to stop the supply of the fuel.
Claim 4
Dependent Claim
50 words
An intake system according to claim 2, said detecting means comprise means for detecting the switching to the fuel supply condition from the fuel-cut condition and timer means for counting a duration time after the occurrence of the switching so as to provide said signals for weakening the supercharging effect.
Claim 5
Dependent Claim
53 words
An intake system according to claim 3, further comprising second detecting means for detecting a degree of acceleration, and means,responsive to the signals from the second detecting means, for controlling the supercharger so that the supercharging effect during the acceleration of a small degree after the lapse of said time is again weakened.
Claim 6
Dependent Claim
81 words
An intake system according to claim 1, wherein said control means comprise a by-pass passageway connected to said intake line and by-passing the supercharger, valve means arranged on said by-pass passageway means for controlling the amount of air passed through the by-pass passageway means, actuator means for operating the valve means, and drive means for producing signals directed to the actuator means so that the by-pass passageway is normally closed during the acceleration condition but partly open during said particular condition.
Claim 7
Dependent Claim
93 words
An intake system according to claim 5, wherein said actuator means comprise a diaphragm actuator operatively connected to the by-pass valve means, and said drive means comprise a pressure switching valve moved between a first condition and a second condition, a pressure delay device, and a pressure source for producing a pressure signal representing the engine load condition, the diaphragm actuator being normally, in its first condition directly connected to the pressure source and being, at the particular condition, in its second condition connected to the pressure source via the pressure delay device.
Claim 8
Dependent Claim
83 words
An intake system according to claim 5, wherein said actuator means comprise a electro-operated actuator mechanically connected to the by-pass control valve, and a drive means comprising means of producing electric signals directed to the actuator, the electric signal being such that the by-pass passageway is closed during the high load condition, while the by-pass passageway is opened during the low load condition, and means for modifying the signal so that the by-pass passageway is gradually closed during said particular kind of condition.
Claim 9
Dependent Claim
62 words
An intake system according to claim 1, wherein said control means comprise clutch means arranged between the supercharger and the engine, the clutch means being engaged during the high load condition and disengaged during the low load condition, and means for controlling the degree of engagement of the clutch so that the supercharging effect is weakened during said particular kind of condition.
Claim 10
Dependent Claim
49 words
An intake system according to claim 1, wherein said connection means comprise clutch means located between the engine and the supercharger for selective connection of the engine rotation to the supercharger, and means for selectively engaging the clutch means when the engine is at least under the acceleration condition.
Claim 11
Dependent Claim
33 words
An intake system according to claim 1, wherein said connection means comprise mechanical connection means for always connecting the engine to the supercharge in order to transmit the engine rotation to the supercharger.
Claim 12
Dependent Claim
37 words
An intake system for an internal combustion engine according to claim 1, wherein said detecting means detect an acceleration wherein the acceleration is effected moderately, for issuing the signal indicating that the supercharging is to be weakened.
Claim 13
Dependent Claim
47 words
An intake system according to claim 12, wherein said detecting means comprise means for detecting the switching to the moderate acceleration and a timer means for counting a duration time after the occurrence of the switching so as to generate said signal for weakening the supercharging effect.
Claim 14
Dependent Claim
58 words
An intake system according to claim 12, further including an air flow meter for measuring the amount of intake air, and further comprising means for allowing the transmission of the signal after a predetermined small period has lapsed from the start of the acceleration for preventing operation of the supercharger by an overshoot of the air flow meter.
Claim 15
Dependent Claim
45 words
An intake system according to claim 12, wherein said detecting means comprise a sensor for detecting the degree of opening of a throttle valve, and means for detecting a degree of change of degree of the throttle valve which is larger than a predetermined level.
Claim 16
Dependent Claim
47 words
An intake system according to claim 12, wherein said detecting means comprise a sensor for detecting the degree of opening of the throttle valve, and means connected to the sensor for detecting a degree of opening of the throttle valve which is larger than a predetermined value.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.