Patent US4697699A successfully refreshed from Google Patents.
Patent EP0376703A2 successfully refreshed from Google Patents.
EP0376703A2
Expired / Lapsed
EP
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Engine control system
Assignee: Honda Motor Co Ltd
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Filing: 1989-12-27
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Granted: —
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Expires: 2009-12-27
Abstract
Abstract An engine control system comprising a variable valve actuating mechanism (14) for an engine (1) which may consist of a mechanism capable of varying valve timing, a variable capacity supercharger (7) which may consist of a turbocharger provided with moveable vanes for varying a cross sectional area of an exhaust gas passage leading to a turbine wheel, and a control unit (21) for controlling a valve actuating operation of the valve actuating mechanism and a capacity varying operation of the variable capacity supercharger. The capacity of the supercharger is controlled by taking into account the operating conditions of the valve actuating mechanism. Thus, the control unit is capable of achieving a precise and prompt control action, and, by appropriately determining the control plan, it is possible to increase the maximum output of the engine and/or to reduce strain on the engine.
Inventors
- 👤 Eitetsu Akiyama
- 👤 Noriyuki Kishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 23:11
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/12; F02B37/24; F01; F01L; F01L1/00; F01L1/26; F01L1/267; F02D; F02D13/00; F02D13/02; F02D13/0203; F02D13/0207; F02B2275/00; F02B2275/18; F02D41/00; F02D41/0002; F02D2041/001; F02D2200/00; F02D2200/50; F02D2200/501; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
An engine control system, comprising: valve actuating condition varying means for varying a state of a valve actuating mechanism of an engine; capacity varying means for varying a supercharge capacity of a variable capacity supercharger; and control means for controlling a valve actuating condition varying operation of said valve actuating condition varying means and a capacity varying operation of said capacity varying means according to an operating condition including at least a rotational speed of said engine; said control means carrying out said capacity varying operation in dependence upon an operating condition of said valve actuating mechanism.
Claim 2
Dependent Claim
97 words
An engine control system, comprising: valve actuating condition varying means for varying a state of a valve actuating mechanism of an engine; capacity varying means for varying a supercharge capacity of a variable capacity supercharger; and control means for controlling a valve actuating condition varying operation of said valve actuating condition varying means and a capacity varying operation of said capacity varying means according to an operating condition including at least a rotational speed of said engine; said control means carrying out said capacity varying operation in dependence upon an operating condition of said valve actuating mechanism.
Claim 3
Dependent Claim
34 words
An engine control system according to claim 1, wherein said control means increases said supercharge capacity when said operating condition of said valve actuating mechanism is adapted for high speed operation of said engine.
Claim 4
Dependent Claim
34 words
An engine control system according to claim 1, wherein said control means decreases said supercharge capacity when said operating condition of said valve actuating mechanism is adapted for high speed operation of said engine.
Claim 5
Dependent Claim
48 words
An engine control system according to claim 1, 2 or 3 wherein said control means carries out said capacity varying operation of said supercharger by an open loop control process at least when said valve actuating means is adapted for a low speed operating condition of said engine.
Claim 6
Dependent Claim
40 words
An engine control system according to claim 4, wherein said open loop control process consists of a map control which determines said supercharge capacity according to a rotational speed of said engine and an opening angle of a throttle valve.
Claim 7
Dependent Claim
46 words
An engine control system according to any preceding claim, wherein said control means carries out said capacity varying operation of said supercharger by a closed loop control process at least when said valve actuating means is adapted for a high speed operating condition of said engine.
Claim 8
Dependent Claim
46 words
An engine control system according to claim 6, further comprising means for detecting change rate of a supercharge pressure of said supercharger, a control parameter of said closed loop control process being varied depending on a detected level of the change rate of said supercharge pressure.
Claim 9
Dependent Claim
41 words
An engine control system according to any preceding claim, wherein said valve actuating means is adapted for low speed operation and said supercharger is adapted for a maximum capacity condition when said engine is placed under a certain special operating condition.
Claim 10
Dependent Claim
55 words
An engine control system according to any preceding claim, wherein said control means changes said supercharge capacity of said supercharger at least in a low speed range so as to increase its supercharge pressure output from a normally controlled level to a boosted level in response to a change of a level of supercharge pressure.
Claim 11
Dependent Claim
65 words
An engine control system according to any preceding claim, wherein said control means changes said supercharge capacity of said supercharger at least in a low speed range so as to increase its supercharge pressure output from a normally controlled level to a boosted level in response to a change in a level of supercharge pressure and a change in the rotational speed of said engine.
References Cited (Backward Citations)
No citation records indexed.
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