US 10,967,831 B2 · Seatbelt control device

Abstract

A seatbelt retractor device includes a pre-tensioner section, and a force limiter section that can change a magnitude of a load at which to start reducing tension of the retracted seatbelt. A seatbelt control ECU activates the pre-tensioner section when a deceleration G detected by a floor sensor exceeds a first threshold, and acquires a collision velocity from a radar device and sets a second threshold value to a lower value the greater the collision velocity. The seatbelt control ECU controls the starting load for tension reduction by the force limiter section to be a high load when the deceleration G has exceeded the second threshold within a determination time period after activation of the pre-tensioner section, and controls the starting load for tension reduction to be a low load when which the deceleration G has not exceeded the second threshold within the determination time period.

Claims8

Dependent claims

A seatbelt control device comprising:

a pre-tensioner configured to retract a seatbelt to increase tension of the seatbelt;
a force limiter configured to change a magnitude of a load at which to start reducing tension of the seatbelt retracted by the pre-tensioner;
a second detection sensor configured to detect a collision velocity;
and
a controller configured to activate the pre-tensioner when a physical quantity relating to a magnitude of a collision detected by a first detection sensor for detecting the physical quantity exceeds a first threshold, the controller controlling the load of the force limiter when, within a predetermined period after activation of the pre-tensioner, the physical quantity detected by the first detection sensor has exceeded a second threshold set according to the collision velocity, so as to be a greater load than the load of the force limiter when the physical quantity has not exceeded the second threshold within the predetermined period.

2 more elements

A seatbelt control device comprising;

a pre-tensioner configured to retract a seatbelt to increase tension of the seatbelt;
a force limiter configured to change a magnitude of a load at which to start reducing tension of the seatbelt retracted by the pre-tensioner:
a collision prediction processor configured to predict a collision:
a first detection sensor configured to detect a physical quantity relating to a magnitude of a collision:
a second detection sensor configured to detect a collision velocity:
and
a controller configured to activate the pre-tensioner when a collision has been predicted by the collision prediction processor, the controller controlling the load of the force limiter when, within a predetermined period after activation of the pre-tensioner or after detection of the collision, the physical quantity detected by the first detection sensor has exceeded a second threshold set according to the collision velocity, so as to be a greater load than the load of the force limiter when the physical quantity has not exceeded the second threshold within the predetermined period.

4 more elements

Dependencies are inferred from the claim text.

Seatbelt control device

Life of this patent

Seatbelt control device

Life of this patent

Abstract

Claims8