Speed limiter
First Claim
Patent Images
1. A speed limiter comprising:
- a capturer for capturing a front of a subject vehicle;
a vehicle speed detector for detecting a speed of the subject vehicle;
an accelerator opening detector for detecting an accelerator opening degree that indicates a depressing amount of an accelerator pedal operated by a driver;
an engine rpm detector for detecting an engine rpm;
a speed limit detector for detecting a speed limit displayed on a speed sign, based on an image captured by the capturer;
an accelerator sensitivity gain setter for setting an accelerator sensitivity gain corresponding to a speed excess if an overspeed is detected based on a speed difference between a vehicle speed detected by the vehicle speed detector and a speed limit detected by the speed limit detector;
a pseudo accelerator opening setter for setting a pseudo accelerator opening degree by correcting an accelerator opening detected by the accelerator opening detector with an accelerator sensitivity gain set by the accelerator sensitivity gain setter; and
a target throttle opening setter for setting a target throttle opening degree based on a pseudo accelerator opening degree set by the pseudo accelerator opening setter and an engine rpm detected by the engine rpm detector.
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Abstract
Provided is a speed limiter, wherein a vehicle speed is detected, and a speed limit displayed on a speed sign is detected based on an image captured by a front monitoring camera. A speed difference between the vehicle speed and the speed limit is calculated, and an accelerator sensitivity gain is set using the speed difference as a parameter. Then an accelerator opening degree is corrected with the accelerator sensitivity gain to obtain a pseudo accelerator opening degree. A target throttle opening degree is set based on the pseudo accelerator opening degree and an engine rpm.
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Citations
15 Claims
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1. A speed limiter comprising:
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a capturer for capturing a front of a subject vehicle; a vehicle speed detector for detecting a speed of the subject vehicle; an accelerator opening detector for detecting an accelerator opening degree that indicates a depressing amount of an accelerator pedal operated by a driver; an engine rpm detector for detecting an engine rpm; a speed limit detector for detecting a speed limit displayed on a speed sign, based on an image captured by the capturer; an accelerator sensitivity gain setter for setting an accelerator sensitivity gain corresponding to a speed excess if an overspeed is detected based on a speed difference between a vehicle speed detected by the vehicle speed detector and a speed limit detected by the speed limit detector; a pseudo accelerator opening setter for setting a pseudo accelerator opening degree by correcting an accelerator opening detected by the accelerator opening detector with an accelerator sensitivity gain set by the accelerator sensitivity gain setter; and a target throttle opening setter for setting a target throttle opening degree based on a pseudo accelerator opening degree set by the pseudo accelerator opening setter and an engine rpm detected by the engine rpm detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification