Airbag electronic control unit with central squib current limiting
First Claim
1. A circuit for an electronic control unit comprising:
- an energy source;
a first current regulator connected to said energy source; and
a plurality of squib deployment circuits connected to said current regulator.
1 Assignment
0 Petitions
Accused Products
Abstract
An airbag deployment circuit includes at single current regulator controlling multiple squib deployment circuits. Squib deployment circuits that do not have to deploy simultaneously are attached to the same current regulator. A current regulation switch located prior to each current regulator is closed if any of the squib deployment circuits attached to the associated current regulator need to be deployed in a crash event. A high side transistor switch and a low side transistor switch are located adjacent each squib to control activation of that squib deployment circuit. The high side transistor switch and the low side transistor switch are also closed for each of the squib deployment circuits that are to be deployed.
6 Citations
20 Claims
-
1. A circuit for an electronic control unit comprising:
-
an energy source;
a first current regulator connected to said energy source; and
a plurality of squib deployment circuits connected to said current regulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An electronic control unit for an airbag deployment system comprising:
-
an energy source; and
a plurality of current regulators each connected to said energy source with a current regulation switch, wherein said plurality of current regulators are each connected to a plurality squib deployment circuits. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A method of controlling an electronic control unit for a restraint system comprising:
-
a) controlling current flow from an energy source to a first plurality of squib deployment circuits with a first current regulator; and
b) closing a first regulator switch to provide current to the first current regulator and the first plurality of squib deployment circuits. - View Dependent Claims (17, 18, 19, 20)
-
Specification