US4969104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diagnosis arrangement for vehicle engine controller
Assignee: Suzuki Motor Corp
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Filing: 1990-01-12
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Granted: 1990-11-06
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Expires: 2010-01-12
Abstract
Abstract A diagnosis arrangement for a vehicle engine controller includes a control arrangement which examines a signal identifying the activation of an auxiliary control system of the engine and which determines whether the auxiliary engine control system, which includes a device controlled by a particular control program selected from a plurality of programs stored therein, is actuated in a manner corresponding to the selected control program.
Inventors
- 👤 Fujiyuki Suzuki
- 👤 Akira Osada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:21
CPC Classifications
G; G07; G07C; G07C5/00; G07C5/08; G07C5/0808; F; F02; F02D; F02D41/00; F02D41/24; F02D41/26; F02D41/263; F02M; F02M26/00; F02M26/49; G01; G01R; G01R31/00; G01R31/005; G01R31/006; G01R31/007; F02M26/52; F02M26/55; F02M26/59; F02M26/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
259 words
An apparatus comprising: an engine having a combustion chamber, having an intake passage and an exhaust passage which each communicate with said combustion chamber, having an exhaust gas recirculation passage communicating at its respective ends with said exhaust passage and said intake passage, and having selectively actuable valve means for respectively permitting and restricting the flow of gases through said recirculation passage when respectively actuated and deactuated; a temperature sensor provided at a location along a path of flow of exhaust gases from said valve means through said recirculation and intake passages to said combustion chamber; and an engine control arrangement which includes control means for controlling said valve means, said control means operating in one of a first operational mode in which said valve is actuated and a second operational mode in which said valve is deactuated, and includes diagnostic means for carrying out a diagnostic test while said control means maintains said valve means continuously in one of said actuated and deactuated states from a start to an end of said diagnostic test, said diagnostic means having an alarm device and carrying out said diagnostic test using a single measured temperature by obtaining from said sensor during said diagnostic test said single measured temperature, by actuating said alarm device when said control means is in said first operation mode and said single measured temperature is below a first constant value and by actuating said alarm device when said control means is in said second operational mode and said single measured temperature is above a second constant value.
Claim 2
Independent Claim
259 words
An apparatus comprising: an engine having a combustion chamber, having an intake passage and an exhaust passage which each communicate with said combustion chamber, having an exhaust gas recirculation passage communicating at its respective ends with said exhaust passage and said intake passage, and having selectively actuable valve means for respectively permitting and restricting the flow of gases through said recirculation passage when respectively actuated and deactuated; a temperature sensor provided at a location along a path of flow of exhaust gases from said valve means through said recirculation and intake passages to said combustion chamber; and an engine control arrangement which includes control means for controlling said valve means, said control means operating in one of a first operational mode in which said valve is actuated and a second operational mode in which said valve is deactuated, and includes diagnostic means for carrying out a diagnostic test while said control means maintains said valve means continuously in one of said actuated and deactuated states from a start to an end of said diagnostic test, said diagnostic means having an alarm device and carrying out said diagnostic test using a single measured temperature by obtaining from said sensor during said diagnostic test said single measured temperature, by actuating said alarm device when said control means is in said first operation mode and said single measured temperature is below a first constant value and by actuating said alarm device when said control means is in said second operational mode and said single measured temperature is above a second constant value.
Claim 3
Dependent Claim
37 words
An apparatus of claim 1, wherein said engine includes a wall portion which defines a portion of said recirculation passage, and wherein said sensor is provided on said wall portion at a location near said intake passage.
Claim 4
Dependent Claim
25 words
An apparatus of claim 3, wherein said sensor is thermistor having a resistance which varies in inverse proportion to the temperature of said wall portion.
Claim 5
Dependent Claim
51 words
An apparatus of claim 1, wherein said engine is water cooled and includes a water temperature sensor, and wherein said control means is responsive to said water temperature sensor for inhibiting actuation of said alarm device whenever the water temperature detected by said water temperature sensor is below a predetermined value.
Claim 6
Dependent Claim
63 words
An apparatus of claim 1, including an external switch coupled to said control means, said control means being responsive to said external switch of operating in said first operational mode when said switch is in a first of open and closed positions and for operating in said second operational mode when said switch is in a second of said open and closed positions.
Claim 7
Dependent Claim
14 words
An apparatus of claim 1, wherein said first and second constant values are equal.
Claim 8
Dependent Claim
14 words
An apparatus of claim 1, wherein said alarm device produces an operator perceptible alarm.
Claim 9
Dependent Claim
24 words
An apparatus of claim 1, wherein said alarm device includes a lamp, said alarm device illuminating said lamp when said alarm device is actuated.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |