US5174263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motorcycle engine management system
Assignee: General Cable Industries Inc
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Filing: 1992-02-13
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Granted: 1992-12-29
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Expires: 2012-02-13
Abstract
Abstract A system for managing operation of a V-twin motorcycle engine that includes a throttle body having an air intake manifold adapted to be mounted to the engine over the cylinder intake ports, and a throttle for control by an operator to admit combustion air into the manifold. A pair of fuel injectors are mounted on the throttle body, and are responsive to electronic injector control signals for injecting fuel into the air intake manifold adjacent to the intake ports. A fuel pump delivers fuel under pressure from a fuel supply, and a pressure regulator is coupled to the pump for supplying fuel at regulated pressure to the injectors. An engine speed sensor is operatively coupled to the engine for supplying an electrical signal as a function of engine speed. A second sensor such as a pressure sensor is operatively coupled to the engine air intake manifold for supplying an electrical signal as a function of combustion air available in the manifold. An electronic controller includes a memory having a plurality of injector pulse width control parameters stored therein as a look-up table addressable as a function of the speed and pressure signals from the respective sensors. The injector control signals are generated as a function of such parameters obtained from the look-up table.
Inventors
- 👤 John D. Meaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:08
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P5/1502; F02D; F02D41/00; F02D41/30; F02D41/32; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
185 words
A system for managing operation of a motorcycle engine that comprises: a throttle body having an air intake manifold coupled to said motorcycle engine and a throttle adapted for control by an operator for controlled admission of combustion air to said manifold, at least one fuel injector mounted on said throttle body and responsive to electronic injector control signals for injecting fuel into said manifold, a fuel pump for delivering fuel under pressure from a fuel supply and pressure regulating means coupled to said pump for supplying fuel at regulated pressure to said injector, an engine speed sensor operatively coupled to said engine for supplying a first electrical signal as a function of engine speed, a sensor operatively coupled to said manifold for supplying a second electrical signal as a function of combustion air available in said manifold, and electronic control means including an electronic memory having a plurality of injector pulse width control parameters stored therein as a look-up table addressable as a function of said first and second signals, and means for generating said injector control signals as a function of said parameters.
Claim 2
Independent Claim
185 words
A system for managing operation of a motorcycle engine that comprises: a throttle body having an air intake manifold coupled to said motorcycle engine and a throttle adapted for control by an operator for controlled admission of combustion air to said manifold, at least one fuel injector mounted on said throttle body and responsive to electronic injector control signals for injecting fuel into said manifold, a fuel pump for delivering fuel under pressure from a fuel supply and pressure regulating means coupled to said pump for supplying fuel at regulated pressure to said injector, an engine speed sensor operatively coupled to said engine for supplying a first electrical signal as a function of engine speed, a sensor operatively coupled to said manifold for supplying a second electrical signal as a function of combustion air available in said manifold, and electronic control means including an electronic memory having a plurality of injector pulse width control parameters stored therein as a look-up table addressable as a function of said first and second signals, and means for generating said injector control signals as a function of said parameters.
Claim 3
Dependent Claim
60 words
The system set forth in claim 1 wherein said memory has a plurality of ignition angle control parameters stored therein as a second look-up table addressable as a function of said first and second signals, and wherein said system further comprises means for controlling ignition angle at said engine as a function of said control parameters in said second table.
Claim 4
Dependent Claim
76 words
The system set forth in claim 1 further comprising a source of fuel enrichment, and a valve mounted on said throttle body coupled to said fuel enrichment source and responsive to electronic valve control signals for delivering fuel enrichment from said source to said manifold, and wherein said electronic control means comprises means responsive to one or both of said sensor signals for providing said valve control signal and thereby delivering fuel enrichment to said engine.
Claim 5
Dependent Claim
22 words
The system set forth in claim 3 wherein said source of fuel enrichment comprises a container of N 2 O under pressure.
Claim 6
Dependent Claim
36 words
The system set forth in claim 3 wherein said control means further comprises means for automatically modifying said injector control signals to increase fuel injection at the engine when fuel enrichment is delivered to said manifold.
Claim 7
Dependent Claim
58 words
The system set forth in claim 1 comprising a throttle position sensor coupled to said throttle for supplying an electrical throttle position signal as a function of position of said throttle, and wherein said means for generating said injector control signals including means for modifying said injector control signals as a function of said throttle position sensor signals.
Claim 8
Dependent Claim
36 words
The system set forth in claim 6 further comprising means coupled to said signal-modifying means and responsive to an operator for controlling modification of said injector control signals as a function of said throttle position signals.
Claim 9
Dependent Claim
27 words
The system set forth in claim 1 further comprising means responsive to an operator for selectively modifying said injector control signals at idle speeds of said engine.
Claim 10
Dependent Claim
52 words
The system set forth in claim 1 further comprising a source of electrical power, and wherein said electronic control means includes means responsive to voltage level at said source of electrical power for modifying said injector control signals to obtain desired fuel injection time independent of voltage level at said power source.
Claim 11
Dependent Claim
60 words
The system set forth in claim 1 further comprising an oxygen sensor responsive to engine exhaust for generating an oxygen sensor signal as a function of oxygen concentration in said exhaust, and wherein said electronic control means comprises means responsive to said oxygen sensor signal for modifying said injector control signals to obtain a desired air/fuel ratio at said engine.
Claim 12
Dependent Claim
45 words
The system set forth in claim 1 further comprising a temperature sensor responsive to operating temperature of said engine for generating an engine temperature signal, and wherein said electronic control means includes means responsive to said engine temperature signal for modifying said injector control signals.
Claim 13
Dependent Claim
48 words
The system set forth in claim 1 further comprising a temperature sensor responsive to air temperature supplied to said manifold for generating a temperature sensor signal, and wherein said electronic control means includes means for modifying said injector control signals as a function of said temperature sensor signals.
Claim 14
Dependent Claim
41 words
The system set forth in claim 1 wherein said sensor for providing said second signal as a function of combustion air available in said manifold comprises a pressure sensor for supplying said second signal as a function of manifold air pressure.
Claim 15
Dependent Claim
47 words
The system set forth in claim 1 wherein said sensor for providing said second signal as a function of combustion air available in said manifold comprises a throttle position sensor coupled to said throttle for supplying said second signal as a function of position of said throttle.
Claim 16
Dependent Claim
51 words
The system set forth in claim 1 wherein said sensor for providing said second sensor signal as a function of combustion air available in said manifold comprises a mass air flow sensor mounted on said manifold for providing said second signal as a function of mass air flow through said manifold.
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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) | 1995-12-29 | 1996-06-29 | 1996-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-29 | 2000-06-29 | 2000-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-29 | 2004-06-29 | 2004-12-29 | $7700.00 | Window Closed / Lapsed |