US5226323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and an apparatus for displaying the output of an internal combustion engine
Assignee: Hitachi Unisia Automotive Ltd
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Filing: 1991-08-05
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Granted: 1993-07-13
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Expires: 2011-08-05
Abstract
Abstract A method of and an apparatus for measuring and displaying the output of an internal combustion engine of a vehicle while the vehicle is moving. An intake air flow quantity Q and a rotation speed N of the engine are calculated to determine an intake air quantity per revolution (Q/N), and provide a base output. At the same time, the method and apparatus detect a fuel flow quantity supplied to the engine, and depending on the fuel flow quantity and intake air flow quantity, calculate an air-fuel ratio by which the base output is corrected to provide an engine output to be displayed.
Inventors
- 👤 Atsuo Wakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:12
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
95 words
A method of displaying an output of an internal combustion engine, comprising the steps of: detecting an intake air flow quantity of the engine; detecting a rotation speed of the engine; calculating an intake air quantity per revolution according to the intake air flow quantity and rotation speed, and finding a base output; detecting a fuel flow quantity supplied to the engine; calculating an air-fuel ratio according to the intake air flow quantity and fuel flow quantity; correcting the base output with the air-fuel ratio, and calculating an engine output; and displaying the engine output.
Claim 2
Independent Claim
95 words
A method of displaying an output of an internal combustion engine, comprising the steps of: detecting an intake air flow quantity of the engine; detecting a rotation speed of the engine; calculating an intake air quantity per revolution according to the intake air flow quantity and rotation speed, and finding a base output; detecting a fuel flow quantity supplied to the engine; calculating an air-fuel ratio according to the intake air flow quantity and fuel flow quantity; correcting the base output with the air-fuel ratio, and calculating an engine output; and displaying the engine output.
Claim 3
Independent Claim
135 words
An apparatus for displaying an output of an internal combustion engine, comprising: an intake air flow quantity detection means for detecting an intake air flow quantity of the engine; an engine speed detection means for detecting a rotation speed of the engine; a base output calculation means for calculating an intake air quantity per revolution according to the intake air flow quantity and rotation speed, and finding a base output; a fuel flow quantity detection means for detecting a fuel flow quantity supplied to the engine; an air-fuel ratio calculation means for calculating an air-fuel ratio according to the intake air flow quantity and fuel flow quantity; an engine output calculation means for correcting the base output with the air-fuel ratio, and calculating an engine output; and a display means for displaying the engine output.
Claim 4
Independent Claim
135 words
An apparatus for displaying an output of an internal combustion engine, comprising: an intake air flow quantity detection means for detecting an intake air flow quantity of the engine; an engine speed detection means for detecting a rotation speed of the engine; a base output calculation means for calculating an intake air quantity per revolution according to the intake air flow quantity and rotation speed, and finding a base output; a fuel flow quantity detection means for detecting a fuel flow quantity supplied to the engine; an air-fuel ratio calculation means for calculating an air-fuel ratio according to the intake air flow quantity and fuel flow quantity; an engine output calculation means for correcting the base output with the air-fuel ratio, and calculating an engine output; and a display means for displaying the engine output.
Claim 5
Dependent Claim
30 words
An apparatus as set forth in claim 2, wherein the base output calculation means finds a base torque by multiplying the intake air quantity per revolution by a predetermined constant.
Claim 6
Dependent Claim
40 words
An apparatus as set forth in claim 3, wherein the base output calculation means includes a base torque correction portion which corrects the base torque by subtracting a loss component based on the engine rotation speed from the base torque.
Claim 7
Dependent Claim
43 words
An apparatus as set forth in claim 4, wherein the engine output calculation means calculates an output torque of the engine by multiplying the base torque calculated by the base output calculation means by a correction coefficient determined according to the air-fuel ratio.
Claim 8
Dependent Claim
39 words
An apparatus as set forth in claim 5, wherein the engine output calculation means includes an output horsepower calculation portion for calculating an output horsepower of the engine according to the output torque and rotation speed of the engine.
Claim 9
Dependent Claim
43 words
An apparatus as set forth in claim 3, wherein the engine output calculation means calculates an output torque of the engine by multiplying the base torque calculated by the base output calculation means by a correction coefficient determined according to the air-fuel ratio.
Claim 10
Dependent Claim
39 words
An apparatus as set forth in claim 7, wherein the engine output calculation means includes an output horsepower calculation portion for calculating ah output horsepower of the engine according to the output torque and rotation speed of the engine.
Claim 11
Independent Claim
151 words
An apparatus for displaying an output of an internal combustion engine, comprising: an intake air flow quantity detection means for detecting an intake air flow quantity of the engine; an engine speed detection means for detecting a rotation speed of the engine; a base output calculation means for calculating an intake air quantity per revolution according to the intake air flow quantity and rotation speed, and finding a base output; a fuel flow quantity detection means for detecting a fuel flow quantity supplied to the engine; an air-fuel ratio calculation means for calculating an air-fuel ratio according to the intake air flow quantity and fuel flow quantity; an ignition timing detection means for detecting an ignition timing of the engine; an engine output calculation means for correcting the base output with the air-fuel ratio and ignition timing, and calculating an engine output; and a display means for displaying the engine output.
Claim 12
Independent Claim
151 words
An apparatus for displaying an output of an internal combustion engine, comprising: an intake air flow quantity detection means for detecting an intake air flow quantity of the engine; an engine speed detection means for detecting a rotation speed of the engine; a base output calculation means for calculating an intake air quantity per revolution according to the intake air flow quantity and rotation speed, and finding a base output; a fuel flow quantity detection means for detecting a fuel flow quantity supplied to the engine; an air-fuel ratio calculation means for calculating an air-fuel ratio according to the intake air flow quantity and fuel flow quantity; an ignition timing detection means for detecting an ignition timing of the engine; an engine output calculation means for correcting the base output with the air-fuel ratio and ignition timing, and calculating an engine output; and a display means for displaying the engine output.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |