US4566309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for monitoring a pressure sensor
Assignee: Robert Bosch GmbH
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Filing: 1983-07-05
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Granted: 1986-01-28
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Expires: 2003-07-05
Abstract
Abstract A pressure sensor is disposed downstream of a throttle valve in the intake tube of an internal combustion engine. When the throttle valve is closed, a throttle valve switch generates a logic signal. A monitoring of the pressure sensor is effected in that upon the simultaneous occurrence of the logic signal and a pressure signal which corresponds to an abnormal or a physically impossible state when the throttle valve is closed, an alarm is triggered.
Inventors
- 👤 David van Belzen
- 👤 Gerhard Lotterbach
- 👤 Jan F. Van Woudenberg
- 👤 Udo Zucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:28
CPC Classifications
G; G01; G01L; G01L23/00; G01L23/24; G01L27/00; G01L27/007
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
72 words
An apparatus for monitoring a pressure sensor disposed downstream of a throttle valve in an intake tube of an internal combustion engine comprising, a throttle valve switch means for generating a logic signal when said throttle valve is closed, means for supplying an abnormal pressure signal from said pressure sensor, and means responsive to the simultaneous occurrence of said logic signal (α=0) and said abnormal pressure signal for triggering an alarm means.
Claim 2
Independent Claim
72 words
An apparatus for monitoring a pressure sensor disposed downstream of a throttle valve in an intake tube of an internal combustion engine comprising, a throttle valve switch means for generating a logic signal when said throttle valve is closed, means for supplying an abnormal pressure signal from said pressure sensor, and means responsive to the simultaneous occurrence of said logic signal (α=0) and said abnormal pressure signal for triggering an alarm means.
Claim 3
Dependent Claim
29 words
An apparatus as defined by claim 1, wherein said alarm means comprises further means for suppressing said pressure signal and for activating an emergency operation function of said engine.
Claim 4
Dependent Claim
23 words
An apparatus as defined by claim 1, wherein said logic signal of said throttle valve switch is subjected to a delay transmission means.
Claim 5
Dependent Claim
23 words
An apparatus as defined by claim 2, wherein said logic signal of said throttle valve switch is subjected to a delayed transmission means.
Claim 6
Dependent Claim
36 words
An apparatus as defined by claim 2, wherein said alarm means is triggered whenever said pressure signal corresponds to a pressure (p) in said intake tube which is greater than the ambient pressure (p 0 ).
Claim 7
Dependent Claim
36 words
An apparatus as defined by claim 3, wherein said alarm means is triggered whenever said pressure signal corresponds to a pressure (p) in said intake tube which is greater than the ambient pressure (p 0 ).
Claim 8
Dependent Claim
46 words
An apparatus as defined by claim 1, wherein said alarm means is triggered whenever said pressure signal corresponds to a pressure (p) in said intake tube which is less than a minimum pressure (p 1 ) occurring at high aspiration on the part of said engine.
Claim 9
Dependent Claim
46 words
An apparatus as defined by claim 2, wherein said alarm means is triggered whenever said pressure signal corresponds to a pressure (p) in said intake tube which is less than a minimum pressure (p 1 ) occurring at high aspiration on the part of said engine.
Claim 10
Dependent Claim
46 words
An apparatus as defined by claim 3, wherein said alarm means is triggered whenever said pressure signal corresponds to a pressure (p) in said intake tube which is less than a minimum pressure (p 1 ) occuring at high aspiration on the part of said engine.
Claim 11
Dependent Claim
52 words
An apparatus as defined by claim 1, further comprising a turbocharger disposed upstream of said throttle valve, said alarm means being triggered whenever said pressure signal corresponds to a pressure (p) which is greater than the sum (p 2 ) of the ambient pressure (p 0 ) and the maximum charge pressure.
Claim 12
Dependent Claim
52 words
An apparatus as defined by claim 2, further comprising a turbocharger disposed upstream of said throttle valve, said alarm means being triggered whenever said pressure signal corresponds to a pressure (p) which is greater than the sum (p 2 ) of the ambient pressure (p 0 ) and the maximum charge pressure.
Claim 13
Dependent Claim
52 words
An apparatus as defined by claim 3, further comprising a turbocharger disposed upstream of said throttle valve, said alarm means being triggered whenever said pressures signal corresponds to a pressure (p) which is greater than the sum (p 2 ) of the ambient pressure (p 0 ) and the maximum charge pressure.
Claim 14
Dependent Claim
51 words
An apparatus as defined by claim 1, further comprising a turbocharger disposed upstream of said throttle valve, said alarm means being triggered whenever said pressure signal corresponds to a pressure (p) which is less than the minimum pressure (p 1 ) occurring at maximum aspiration on the part of said engine.
Claim 15
Dependent Claim
51 words
An apparatus as defined by claim 2, further comprising a turbocharger disposed upstream of said throttle valve, said alarm means being triggered whenever said pressure signal corresponds to a pressure (p) which is less than the minimum pressure (p 1 ) occurring at maximum aspiration on the part of said engine.
Claim 16
Dependent Claim
51 words
An apparatus as defined by claim 3, further comprising a turbocharger disposed upstream of said throttle valve, said alarm means being triggered whenever said pressure signal corresponds to a pressure (p) which is less than the minimum pressure (p 1 ) occurring at maximum aspiration on the part of said engine.
Claim 17
Dependent Claim
26 words
An apparatus as defined by claim 1, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 18
Dependent Claim
26 words
An apparatus as defined by claim 2, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 19
Dependent Claim
26 words
An apparatus as defined by claim 3, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 20
Dependent Claim
26 words
An apparatus as defined by claim 4, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 21
Dependent Claim
26 words
An apparatus as defined by claim 5, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 22
Dependent Claim
26 words
An apparatus as defined by claim 6, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 23
Dependent Claim
26 words
An apparatus as defined by claim 7, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 24
Dependent Claim
26 words
An apparatus as defined by claim 8, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 25
Dependent Claim
26 words
An apparatus as defined by claim 9, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 26
Dependent Claim
26 words
An apparatus as defined by claim 10, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 27
Dependent Claim
26 words
An apparatus as defined by claim 11, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 28
Dependent Claim
26 words
An apparatus as defined by claim 12, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 29
Dependent Claim
26 words
An apparatus as defined by claim 13, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 30
Dependent Claim
26 words
An apparatus as defined by claim 14, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 31
Dependent Claim
26 words
An apparatus as defined by claim 15, wherein means is provided for suppressing the monitoring of said pressure sensor during the starting phase of said engine.
Claim 32
Independent Claim
68 words
A method for monitoring a pressure sensor disposed downstream of a throttle valve in an intake tube of an internal combustion engine, comprising the steps of, generating a logic signal in response to the closure of said throttle valve, supplying an abnormal pressure signal from said pressure sensor, sensing the simultaneous occurrence of said logic signal and said abnormal pressure signal, and triggering an alarm in response thereto.
Claim 33
Independent Claim
68 words
A method for monitoring a pressure sensor disposed downstream of a throttle valve in an intake tube of an internal combustion engine, comprising the steps of, generating a logic signal in response to the closure of said throttle valve, supplying an abnormal pressure signal from said pressure sensor, sensing the simultaneous occurrence of said logic signal and said abnormal pressure signal, and triggering an alarm in response thereto.
Claim 34
Dependent Claim
29 words
A method according to claim 31, wherein said pressure signal corresponds to a pressure (p) in said intake tube which is greater than the ambient pressure (p 0 ).
Claim 35
Dependent Claim
39 words
A method according to claim 31, wherein said pressure signal corresponds to a pressure (p) in said intake tube which is less than a minimum pressure (p 1 ) occuring at high aspiration on the part of said engine.
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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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |