US5799262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant speed control system for electric vehicle and the method thereof
Assignee: Subaru Corp
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Filing: 1996-01-22
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Granted: 1998-08-25
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Expires: 2016-01-22
Abstract
Abstract Disclosed is a system and method for controlling a vehicle speed of an electric vehicle so as to be operated at a designated constant vehicle speed. When the constant speed running mode is selected and the vehicle speed is designated to a given vehicle speed, a motor torque needed for the constant speed running is instructed to a motor controller. When an accelerator pedal is depressed during the constant speed running, the motor torque is compared with an accelerator torque corresponding to the amount of depression of the accelerator pedal. If the accelerator torque is larger than the motor torque, the vehicle is accelerated and if the accelerator torque is smaller than the motor torque, the vehicle is kept running at or is returned to the designated constant speed, thereby a smooth passing or lane changing during the constant speed running can be made.
Inventors
- 👤 Akira Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:36
CPC Classifications
B; B60; B60L; B60L15/00; B60L15/20; B60K; B60K31/00; B60K1/00; B60K26/00; B60K26/04; B60W; B60W2540/00; B60W2540/10; B60W2710/00; B60W2710/06; B60W2710/0644; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/72
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
225 words
A constant speed running control system of an electric vehicle for automatically operating said electric vehicle at a selectively designated vehicle speed, said vehicle having a driving motor for driving said electric vehicle, a controller for controlling said motor and an accelerator pedal for controlling said motor through said controller, comprising: motor indication torque calculating means for calculating a motor indication torque needed when said vehicle runs at said designated vehicle speed; motor indication torque instructing means for inputting said motor indication torque to said controller; vehicle speed detecting means for detecting a vehicle speed after said motor torque instructing means inputs said motor indication torque; vehicle speed comparing means for judging whether or not said vehicle speed is equal to or larger than said designated vehicle speed; accelerator indication torque calculating means for calculating an accelerator indication torque inputted from said accelerator pedal; accelerator indication torque instructing means for inputting said accelerator indication torque to said controller when said vehicle speed comparing means judges that said vehicle speed is equal to or larger than said designated vehicle speed; and constant speed running instructing means for instructing said motor indication torque to said controller so as to operate said vehicle in accordance with said designated vehicle speed when said vehicle speed comparing means judges that said vehicle speed is smaller than said designated vehicle speed.
Claim 2
Dependent Claim
225 words
A constant speed running control system of an electric vehicle for automatically operating said electric vehicle at a selectively designated vehicle speed, said vehicle having a driving motor for driving said electric vehicle, a controller for controlling said motor and an accelerator pedal for controlling said motor through said controller, comprising: motor indication torque calculating means for calculating a motor indication torque needed when said vehicle runs at said designated vehicle speed; motor indication torque instructing means for inputting said motor indication torque to said controller; vehicle speed detecting means for detecting a vehicle speed after said motor torque instructing means inputs said motor indication torque; vehicle speed comparing means for judging whether or not said vehicle speed is equal to or larger than said designated vehicle speed; accelerator indication torque calculating means for calculating an accelerator indication torque inputted from said accelerator pedal; accelerator indication torque instructing means for inputting said accelerator indication torque to said controller when said vehicle speed comparing means judges that said vehicle speed is equal to or larger than said designated vehicle speed; and constant speed running instructing means for instructing said motor indication torque to said controller so as to operate said vehicle in accordance with said designated vehicle speed when said vehicle speed comparing means judges that said vehicle speed is smaller than said designated vehicle speed.
Claim 3
Dependent Claim
279 words
A constant speed running control system of an electric vehicle for automatically operating said electric vehicle at a selectively designated vehicle speed, said vehicle having a driving motor for driving said electric vehicle, a controller for controlling said motor and an accelerator pedal for controlling said motor through said controller, comprising: motor indication torque calculating means for calculating a motor indication torque needed when said vehicle runs at said designated vehicle speed; motor indication torque instructing means for instructing said motor indication torque to said controller; vehicle speed detecting means for detecting a vehicle speed after said motor torque instructing means inputs said motor indication torque; accelerator indication torque calculating means for calculating an accelerator indication torque inputted from said accelerator pedal; indication torque comparing means for judging whether or not said accelerator indication torque is equal to or larger than said motor indication torque; vehicle speed detecting means for detecting a vehicle speed after said accelerator indication torque is outputted to said controller; vehicle speed comparing means for judging whether or not said vehicle speed is equal to or larger than said designated vehicle speed; accelerator indication torque instructing means for inputting said accelerator indication torque to said controller when said vehicle speed comparing means judges that said vehicle speed is equal to or larger than said designated vehicle speed; constant speed running instructing means for inputting said motor indication torque to said controller so as to operate said vehicle in accordance with said designated vehicle speed when said accelerator indication torque is smaller than said motor indication torque or when said vehicle speed comparing means judges that said vehicle speed is smaller than said designated vehicle speed.
Claim 4
Dependent Claim
279 words
A constant speed running control system of an electric vehicle for automatically operating said electric vehicle at a selectively designated vehicle speed, said vehicle having a driving motor for driving said electric vehicle, a controller for controlling said motor and an accelerator pedal for controlling said motor through said controller, comprising: motor indication torque calculating means for calculating a motor indication torque needed when said vehicle runs at said designated vehicle speed; motor indication torque instructing means for instructing said motor indication torque to said controller; vehicle speed detecting means for detecting a vehicle speed after said motor torque instructing means inputs said motor indication torque; accelerator indication torque calculating means for calculating an accelerator indication torque inputted from said accelerator pedal; indication torque comparing means for judging whether or not said accelerator indication torque is equal to or larger than said motor indication torque; vehicle speed detecting means for detecting a vehicle speed after said accelerator indication torque is outputted to said controller; vehicle speed comparing means for judging whether or not said vehicle speed is equal to or larger than said designated vehicle speed; accelerator indication torque instructing means for inputting said accelerator indication torque to said controller when said vehicle speed comparing means judges that said vehicle speed is equal to or larger than said designated vehicle speed; constant speed running instructing means for inputting said motor indication torque to said controller so as to operate said vehicle in accordance with said designated vehicle speed when said accelerator indication torque is smaller than said motor indication torque or when said vehicle speed comparing means judges that said vehicle speed is smaller than said designated vehicle speed.
Claim 5
Dependent Claim
173 words
A constant speed running control method of operating an electric vehicle at a selectively designated vehicle speed, said vehicle having a driving motor for driving said electric vehicle, a controller for controlling said motor and an accelerator pedal for controlling said motor through said controller, comprising the steps of: calculating a motor indication torque needed when said vehicle runs at said designated vehicle speed; inputting said motor indication torque to said controller; detecting a vehicle speed after said motor indication torque is inputted; judging whether or not said vehicle speed is equal to or larger than said designated vehicle speed; calculating an accelerator indication torque inputted from said accelerator pedal; inputting said accelerator indication torque to said controller when it is judged that said vehicle speed is equal to or larger than said designated vehicle speed; and inputting said motor indication torque to said controller so as to operate said vehicle in accordance with said designated vehicle speed when it is judged that said vehicle speed is smaller than said designated vehicle speed.
Claim 6
Dependent Claim
173 words
A constant speed running control method of operating an electric vehicle at a selectively designated vehicle speed, said vehicle having a driving motor for driving said electric vehicle, a controller for controlling said motor and an accelerator pedal for controlling said motor through said controller, comprising the steps of: calculating a motor indication torque needed when said vehicle runs at said designated vehicle speed; inputting said motor indication torque to said controller; detecting a vehicle speed after said motor indication torque is inputted; judging whether or not said vehicle speed is equal to or larger than said designated vehicle speed; calculating an accelerator indication torque inputted from said accelerator pedal; inputting said accelerator indication torque to said controller when it is judged that said vehicle speed is equal to or larger than said designated vehicle speed; and inputting said motor indication torque to said controller so as to operate said vehicle in accordance with said designated vehicle speed when it is judged that said vehicle speed is smaller than said designated vehicle speed.
Claim 7
Dependent Claim
218 words
A constant speed running control method of operating an electric vehicle at a selectively designated vehicle speed, said vehicle having a driving motor for driving said electric vehicle, a controller for controlling said motor and an accelerator pedal for controlling said motor through said controller, comprising the steps of: calculating a motor indication torque needed when said vehicle runs at said designated vehicle speed; inputting said motor indication torque to said controller; detecting a vehicle speed after said motor indication torque is inputted; calculating an accelerator indication torque inputted from said accelerator pedal; judging whether or not said accelerator indication torque is equal to or larger than said motor indication torque; detecting a vehicle speed after said accelerator indication torque is outputted to said controller; judging whether or not said vehicle speed is equal to or larger than said designated vehicle speed; inputting said accelerator indication torque to said controller when it is judged that said vehicle speed is equal to or larger than said designated vehicle speed; and inputting said motor indication torque to said controller so as to operate said vehicle in accordance with said designated vehicle speed when said accelerator indication torque is smaller than said motor indication torque or when it is judged that said vehicle speed is smaller than said designated vehicle speed.
Claim 8
Dependent Claim
218 words
A constant speed running control method of operating an electric vehicle at a selectively designated vehicle speed, said vehicle having a driving motor for driving said electric vehicle, a controller for controlling said motor and an accelerator pedal for controlling said motor through said controller, comprising the steps of: calculating a motor indication torque needed when said vehicle runs at said designated vehicle speed; inputting said motor indication torque to said controller; detecting a vehicle speed after said motor indication torque is inputted; calculating an accelerator indication torque inputted from said accelerator pedal; judging whether or not said accelerator indication torque is equal to or larger than said motor indication torque; detecting a vehicle speed after said accelerator indication torque is outputted to said controller; judging whether or not said vehicle speed is equal to or larger than said designated vehicle speed; inputting said accelerator indication torque to said controller when it is judged that said vehicle speed is equal to or larger than said designated vehicle speed; and inputting said motor indication torque to said controller so as to operate said vehicle in accordance with said designated vehicle speed when said accelerator indication torque is smaller than said motor indication torque or when it is judged that said vehicle speed is smaller than said designated vehicle speed.
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) | 2001-08-24 | 2002-02-23 | 2002-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-24 | 2006-02-23 | 2006-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-24 | 2010-02-23 | 2010-08-25 | $7700.00 | Window Closed / Lapsed |