초록 ▼

A safety restraint system having a seat belt retractor actuated by an electric motor, a logic control responsive to the state of a buckle switch and the outputs of a motor current sensor, a motor terminal voltage sensor and a crash sensor for generating mode signals corresponding to the operational

A safety restraint system having a seat belt retractor actuated by an electric motor, a logic control responsive to the state of a buckle switch and the outputs of a motor current sensor, a motor terminal voltage sensor and a crash sensor for generating mode signals corresponding to the operational state of the system, and a motor power control responsive to the mode signals for adjusting the seat belt for optimum safety of the occupant. When the seat belt is buckled the logic control will sequentially generate signals activating the power control to energize the retractor\s motor to snug up the seat belt against the occupant\s shoulder, then reverse its direction to provide a predetermined slack. The crash sensor will cause the motor to be energized to remove most of the slack before the crash loads are imposed upon the seat belt and the retractor. Unbuckling the seat belt energized the motor to stow the seat belt. The system is also responsive to movements of the occupant beyond the limits of the provided slack which increase the seat belt\s slack. Upon the detection of such movements, the system will after a predetermined delay return the seat belt to its initial adjusted state.

대표청구항 ▼

In an electrically adjusted safety restraint system for restraining an occupant in a vehicle\s seat having a seat belt with one end attached to a structural member of the vehicle and the other end attached to a seat belt retractor, wherein the improvement comprises: an electric motor operatively con

In an electrically adjusted safety restraint system for restraining an occupant in a vehicle\s seat having a seat belt with one end attached to a structural member of the vehicle and the other end attached to a seat belt retractor, wherein the improvement comprises: an electric motor operatively connected to the retractor for actuating the retractor to retract the seat belt; switch means associated with the seat belt having a first state signifying that the seat belt is secured about the occupant and a second state signifying the seat belt is not secured about the occupant; a motor current sensor responsive to said first state for generating a snugged-up signal in response to the motor\s current exceeding a predetermined value signifying the seat belt has been snugged up to the seat\s occupant with a predetermined force; logic means for generating a first control signal in response to the state of said switch means, for terminating said first control signal in response to said snugged-up signal and for generating a second control signal in response to the termination of said first control signal; and motor power control means for providing electrical power to said motor in response to said first control signal for actuating the retractor to snug up the seat belt and to stow the seat belt when the seat belt is not secured about the occupant and in response to said second control signal for actuating the retractor to unreel a length of seat belt to produce a predetermined slack.