Safety device for motor vehicle
First Claim
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1. A safety device for a vehicle comprising:
- a distance information detecting element for detecting a distance to a crash object and a relative speed relative to the crash object;
a passenger protection element for lightening crash damage by completing a transition to a passenger protecting state after a predetermined actuation rise time elapses from an actuation start time;
a calculation and control element for ordering a start of actuation with as the actuation start time the time at which an available time before crash that is the time to an estimated crash time calculated on the basis of the detected distance and relative speed falls to a predetermined first threshold time set to be equal to or longer than said actuation rise time; and
a deceleration rate information detecting element for detecting deceleration rate information relating to a deceleration rate that is a rate of change of said relative speed, said calculation and control element corrects said actuation start time on the basis of said deceleration rate information.
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Abstract
In a passenger restraint device for an automotive vehicle, when the relative speed of the vehicle with respect to a crash object changes as a result of a driving maneuver of the vehicle performed before a crash, the actual crash time deviates from an estimated crash time calculated from the distance and the relative speed of the vehicle and the crash object. To resolve this, the actuation timing, actuation rise time and seat belt tension of a seat belt reeling-in device are varied on the basis of information relating to a deceleration rate that is a rate of decrease of the relative speed.
23 Citations
31 Claims
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1. A safety device for a vehicle comprising:
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a distance information detecting element for detecting a distance to a crash object and a relative speed relative to the crash object;
a passenger protection element for lightening crash damage by completing a transition to a passenger protecting state after a predetermined actuation rise time elapses from an actuation start time;
a calculation and control element for ordering a start of actuation with as the actuation start time the time at which an available time before crash that is the time to an estimated crash time calculated on the basis of the detected distance and relative speed falls to a predetermined first threshold time set to be equal to or longer than said actuation rise time; and
a deceleration rate information detecting element for detecting deceleration rate information relating to a deceleration rate that is a rate of change of said relative speed, said calculation and control element corrects said actuation start time on the basis of said deceleration rate information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A safety device for a vehicle comprising:
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a distance information detecting element for detecting a distance to a crash object and a relative speed relative to the crash object;
a passenger protection element for lightening crash damage by completing a transition to a passenger protecting state after a predetermined actuation rise time elapses from an actuation start time;
a calculation and control element for ordering a start of actuation with as the actuation start time the time at which an available time before crash that is the time to an estimated crash time calculated on the basis of the detected distance and relative speed falls to a predetermined first threshold time set to be equal to or longer than said actuation rise time, and for ordering a stop of actuation with as an actuation stop time the time advancing by a predetermined third threshold time from said estimated crash time; and
a deceleration rate information detecting element for detecting deceleration rate information relating to a deceleration rate that is a rate of change of said relative speed, said calculation and control element corrects said actuation stop time on the basis of said deceleration rate information. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A safety device for a vehicle comprising:
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a distance information detecting element for detecting a distance to a crash object and a relative speed relative to the crash object;
a passenger protection element for lightening crash damage by completing a transition to a passenger protecting state after a predetermined actuation rise time elapses from an actuation start time;
a calculation and control element for ordering a start of actuation with as the actuation start time the time at which an available time before crash that is the time to an estimated crash time calculated on the basis of the detected distance and relative speed falls to a predetermined first threshold time set to be equal to or longer than said actuation rise time; and
a deceleration rate information detecting element for detecting deceleration rate information relating to a deceleration rate that is a rate of change of said relative speed, said calculation and control element adjusts a strength of a protection actuation of said passenger protection element on the basis of said deceleration rate information. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A safety device for a vehicle comprising:
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a distance information detecting element for detecting a distance to a crash object and a relative speed relative to the crash object;
a passenger protection element for lightening crash damage by completing a transition to a passenger protecting state after a predetermined actuation rise time elapses from an actuation start time; and
a calculation and control element for ordering a start of actuation with as the actuation start time the time at which an available time before crash that is the time to an estimated crash time calculated on the basis of the detected distance and relative speed falls to a predetermined first threshold time set to be equal to or longer than said actuation rise time; and
said calculation and control element actuates said passenger protection element so as to make the actuation rise time shorter when said available time before crash is short compared to when it is long. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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Specification