With the increase in vehicle production and enhanced public awareness of automotive safety systems, demand for airbag inflators has continued to increase. We remain committed to developing products that respond to the continually growing need in this area, including pedestrian protection and protection against short circuits in electric vehicles.
An airbag system comprises an inflator that activates upon receiving a signal from collision sensors and a bag that inflates like a balloon.
When the sensors detect a collision, a signal is sent to the ECU (a device containing circuitry for diagnosing a collision). If the ECU determines a collision has occurred, it generates an ignition current to activate the inflator within a few milliseconds, which inflates the airbag to protect the occupant.
Operating Principle of Inflators
To meet all the performance and quality requirements for airbags, we now manufacture three types of airbag inflators that employ different methods.
Gas generation through combustion of propellant
Compressed Gas Method
Release of inert compressed gas
A combination of pyrotechnic and compressed gas methods
Inflators for the driver airbag
This gas-generating system protects the driver in a head-on collision. It employs the pyrotechnic method.
Inflators for the passenger airbag
This gas-generating system protects the front passenger in a head-on collision. It employs the pyrotechnic and hybrid methods.
Inflators for the side airbag
This gas-generating system protects the occupant's chest and abdomen in a side collision.
It employs the pyrotechnic and hybrid methods.
Inflators for the side curtain airbag
This gas-generating system protects the occupant's head in a side collision.
It employs the pyrotechnic, compressed gas, and hybrid methods.
Inflators for the knee airbag
This gas-generating system protects the occupant’s legs in a head-on collision. It employs the pyrotechnic and hybrid methods.
Operating Principle of Seat belt Pretensioners
During a collision, the seat belt remains locked while the pressure is dispersed maximally to the chest area.
After the collision, the PGG applies force to the piston, causing the pretensioner to instantly pull on the seat belt, restraining the occupant in the seat.
After the collision, the inflation of the airbag reduces the force applied to the head and chest area.
At the same time, the seat belt tension is moderately eased by the activation of force limiters.
Gas generators for seat belt pretensioners (PGG)
This gas generator protects the occupant by retracting the seat belt during a collision. It employs the pyrotechnic method.
Power Disconnect Devices
The device instantly disconnects an electrical harness. It is intended for use in facilities and devices that require emergency electricity disconnection. For example, they prevent current leakage from a hybrid or electrical vehicle battery following a collision.
This device instantly pushes out a pin. It is expected to be used as an actuator for popup hood to protect people in the event of a car collision where it is necessary to push out a pin in an emergency situation.
This device instantly pulls a pin. It is used on devices that require a pin to be pulled in an emergency situation.