EP0123083A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Control system and control method for a vehicle
Assignee: Nissan Motor Co Ltd
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Filing: 1984-03-08
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Granted: —
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Expires: 2004-03-08
Abstract
Abstract A control strategy is disclosed wherein a desired driving force is determined based on sensed input signals and a throttle actuator and a reduction ratio actuator are actuated so that the engine can produce the desired driving force without deviating from the predetermined best fuel economy curve.
Inventors
- 👤 Hajime Satoh
- 👤 Naohiko Inoue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 09:10
CPC Classifications
B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/10; B60W10/101; B60W30/00; B60W30/18; B60W30/1819; F; F02; F02D; F02D11/00; F02D11/06; F02D11/10; F02D11/105; F16; F16D; F16D27/00; F16D27/10; F16D48/00; F16D48/06; F16D48/064; F16H; F16H61/00; F16H61/66; B60W2710/00; B60W2710/10; B60W2710/105; F02D9/00; F02D9/02; F02D2009/0201; F02D2009/0261; F02D2011/101; F02D2011/102; F02D2011/103; F16D2500/00; F16D2500/10; F16D2500/104; F16D2500/10443; F16D2500/10475; F16D2500/30; F16D2500/31; F16D2500/3108; F16D2500/314; F16D2500/31406; F16D2500/3144; F16D2500/70; F16D2500/704; F16D2500/70452; F16D2500/70462; F16D2500/70464; F16D2500/70488; Y; Y10; Y10S; Y10S477/00; Y10S477/906
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
355 words
A control system for a vehicle having an accelerator pedal, an engine and a continuously variable transmission, the engine having a throttle which opens in degrees, comprising: an accelerator sensor means for detecting the depression degree of the accelerator pedal and generating an accelerator pedal depression degree indicative signal; a vehicle speed sensor means for detecting a vehicle speed of the vehicle and generating a vehicle speed indicative signal; a driving force pattern determining means for determining a desired driving force to be given to a driving wheel of the vehicle as a function of the depression degree of the accelerator pedal and the vehicle speed and generating a desired driving force indicative signal; a desired engine power output computing means for performing a computation based on the desired driving force indicative signal and the vehicle speed indicative signal so as to give a desired engine power output which is to be produced by the engine and generating a desired engine power output indicative signal; a desired throttle opening degree determining means for determining a desired throttle opening degree based on the desired engine power output indicative signal and generating a desired throttle opening degree indicative signal; a throttle control means for generating a throttle opening degree command signal based on the desired throttle opening degree indicative signal; a desired engine speed determining means for determining a desired engine speed based on the desired engine power output indicative signal; a desired reduction ratio arithmetical operation means for performing an arithmetical operation based on the desired engine speed indicative signal and the vehicle speed indicative signal so as to give a desired reduction ratio and generating a desired reduction ratio indicative signal; a reduction ratio control means for generating a reduction ratio command signal based on the desired reduction ratio indicative signal; a throttle actuator operatively connected to the throttle valve for opening the throttle valve to the desired throttle opening degree in response to the desired throttle opening degree indicative signal; and a reduction ratio actuator which controls an actual reduction ratio in the continuously variable transmission in response to the 'reduction ratio command signal.
Claim 2
Dependent Claim
355 words
A control system for a vehicle having an accelerator pedal, an engine and a continuously variable transmission, the engine having a throttle which opens in degrees, comprising: an accelerator sensor means for detecting the depression degree of the accelerator pedal and generating an accelerator pedal depression degree indicative signal; a vehicle speed sensor means for detecting a vehicle speed of the vehicle and generating a vehicle speed indicative signal; a driving force pattern determining means for determining a desired driving force to be given to a driving wheel of the vehicle as a function of the depression degree of the accelerator pedal and the vehicle speed and generating a desired driving force indicative signal; a desired engine power output computing means for performing a computation based on the desired driving force indicative signal and the vehicle speed indicative signal so as to give a desired engine power output which is to be produced by the engine and generating a desired engine power output indicative signal; a desired throttle opening degree determining means for determining a desired throttle opening degree based on the desired engine power output indicative signal and generating a desired throttle opening degree indicative signal; a throttle control means for generating a throttle opening degree command signal based on the desired throttle opening degree indicative signal; a desired engine speed determining means for determining a desired engine speed based on the desired engine power output indicative signal; a desired reduction ratio arithmetical operation means for performing an arithmetical operation based on the desired engine speed indicative signal and the vehicle speed indicative signal so as to give a desired reduction ratio and generating a desired reduction ratio indicative signal; a reduction ratio control means for generating a reduction ratio command signal based on the desired reduction ratio indicative signal; a throttle actuator operatively connected to the throttle valve for opening the throttle valve to the desired throttle opening degree in response to the desired throttle opening degree indicative signal; and a reduction ratio actuator which controls an actual reduction ratio in the continuously variable transmission in response to the 'reduction ratio command signal.
Claim 3
Dependent Claim
31 words
A control system as claimed in claim 1, wherein the throttle control means corrects the throttle opening degree command signal in response to a signal indicative of the actual reduction ratio.
Claim 4
Dependent Claim
196 words
A control system as claimed in claim 1, wherein said throttle actuator comprises: a housing; a drive motor; a planetary gear mechanism including a first gear fixed to a rotary shaft of the drive motor, a second gear fixed to said housing and a third gear meshing with the first and second gears and is urged to rotate by the rotation of the first gear while orbiting around the rotary shaft of said motor; a rotor having a shaft rotatably inserted into the third gear so as to let the orbiting movement of the third gear be transmitted thereto; an electromagnetic clutch mechanism having an electromagnetic coil and a yoke made of an electromagnetic material; a throttle shaft connected to the throttle valve, the throttle shaft having an integral clutch disc to which the rotation of the rotor is transmitted by the electromagnetic clutch and a throttle valve attached to one end thereof; a return spring arranged between the rotor and the clutch disc; and a sensor including a slit plate with a plurality of slits and attached to the throttle shaft and a photo interruptor having a photo emitter element and a photo receiver element.
Claim 5
Dependent Claim
46 words
A control system as claimed in claim 3, wherein the restoring force of the spring does not act on the throttle shaft when the electromagnetic clutch is ON, while it acts on the throttle shaft when the electromagnetic clutch is OFF, thus closing said throttle valve.
Claim 6
Dependent Claim
39 words
A control system as claimed in claim 3, wherein there is provided a fail-safe function that upon occurrence of the event which requires fail-safe function in the vehicle, the restoring force of said return spring closes the throttle valve.
Claim 7
Dependent Claim
283 words
A control method for a vehicle having an accelerator pedal, an engine and a continuously variable transmission, the engine having a throttle which opens in degrees, comprising: detecting the depression degree of the accelerator pedal and generating an accelerator pedal depression degree indicative signal; detecting a vehicle speed of the vehicle and generating a vehicle speed indicative signal; determining a desired driving force to be given to a driving wheel of the vehicle as a function of the depression degree of the accelerator pedal and the vehicle speed and generating a desired driving force indicative signal; performing a computation based on the desired driving force indicative signal and the vehicle speed indicative signal so as to give a desired engine power output which is to be produced by the engine and generating a desired engine power output indicative signal; determining a desired throttle opening degree based on the desired engine power output indicative signal and generating a desired throttle opening degree indicative signal; generating a throttle opening degree command signal based on the desired throttle opening degree indicative signal; determining means for determining a desired engine speed based on the desired engine power output indicative signal; performing an arithmetical operation based on the desired engine speed indicative signal and the vehicle speed indicative signal so as to give a desired reduction ratio and generating a desired reduction ratio indicative signal; generating a reduction ratio command signal based on the desired reduction ratio indicative signal; opening the throttle valve to the desired throttle opening degree in response to the desired throttle opening degree indicative signal; and controlling an actual reduction ratio in the continuously variable transmission in response to the reduction ratio command signal.
Claim 8
Dependent Claim
283 words
A control method for a vehicle having an accelerator pedal, an engine and a continuously variable transmission, the engine having a throttle which opens in degrees, comprising: detecting the depression degree of the accelerator pedal and generating an accelerator pedal depression degree indicative signal; detecting a vehicle speed of the vehicle and generating a vehicle speed indicative signal; determining a desired driving force to be given to a driving wheel of the vehicle as a function of the depression degree of the accelerator pedal and the vehicle speed and generating a desired driving force indicative signal; performing a computation based on the desired driving force indicative signal and the vehicle speed indicative signal so as to give a desired engine power output which is to be produced by the engine and generating a desired engine power output indicative signal; determining a desired throttle opening degree based on the desired engine power output indicative signal and generating a desired throttle opening degree indicative signal; generating a throttle opening degree command signal based on the desired throttle opening degree indicative signal; determining means for determining a desired engine speed based on the desired engine power output indicative signal; performing an arithmetical operation based on the desired engine speed indicative signal and the vehicle speed indicative signal so as to give a desired reduction ratio and generating a desired reduction ratio indicative signal; generating a reduction ratio command signal based on the desired reduction ratio indicative signal; opening the throttle valve to the desired throttle opening degree in response to the desired throttle opening degree indicative signal; and controlling an actual reduction ratio in the continuously variable transmission in response to the reduction ratio command signal.
Claim 9
Dependent Claim
187 words
A throttle actuator comprising: a housing; a drive motor; a planetary gear mechanism including a first gear fixed to a rotary shaft of the drive motor, a second gear fixed to said housing and a third gear meshing with the first and second gears and is urged to rotate by the rotation of the first gear while orbiting around the rotary shaft of said motor; a rotor having a shaft rotatably inserted into the third gear so as to let the orbiting movement of the third gear be transmitted thereto; an electromagnetic clutch mechanism having an electromagnetic coil and a yoke made of an electromagnetic material; a throttle shaft connected to the throttle valve, the throttle shaft having an integral clutch disc to which the rotation of the rotor is transmitted by the electromagnetic clutch and a throttle valve attached to one end thereof; a return spring arranged between the rotor and the clutch disc; and a sensor including a slit plate with a plurality of slits and attached to the throttle shaft and a photo interruptor having a photo emitter element and a photo receiver element.
Claim 10
Dependent Claim
187 words
A throttle actuator comprising: a housing; a drive motor; a planetary gear mechanism including a first gear fixed to a rotary shaft of the drive motor, a second gear fixed to said housing and a third gear meshing with the first and second gears and is urged to rotate by the rotation of the first gear while orbiting around the rotary shaft of said motor; a rotor having a shaft rotatably inserted into the third gear so as to let the orbiting movement of the third gear be transmitted thereto; an electromagnetic clutch mechanism having an electromagnetic coil and a yoke made of an electromagnetic material; a throttle shaft connected to the throttle valve, the throttle shaft having an integral clutch disc to which the rotation of the rotor is transmitted by the electromagnetic clutch and a throttle valve attached to one end thereof; a return spring arranged between the rotor and the clutch disc; and a sensor including a slit plate with a plurality of slits and attached to the throttle shaft and a photo interruptor having a photo emitter element and a photo receiver element.
References Cited (Backward Citations)
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