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US 10,583,794 B2Granted
Method and system for diagnostic measurement of fault condition for common connected squib loops in restraint control module
AssigneeVeoneer US, Inc.
InventorsVincent Colarossi, Stuart Koch
Life of this patent
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Abstract
A method and system for diagnosing a fault condition in common connected squib loops is disclosed. A current source supplies current to the feed terminal for the first squib loop and current is returned through the feed terminal for the second squib loop. The voltage is measured between the feed terminal for the first squib loop and the feed terminal for the second squib loop.
Claims15
A system for diagnosing leakage in a dual squib loop with a common return line, the system comprising;
- a first high side driver connected to a firing voltage source and a first feed terminal for the first squib loop;
- a first low side driver connected to a first return terminal for the first squib loop and a ground;
- a second high side driver connected to the firing voltage source and a second feed terminal for second first squib loop;
- a second low side driver connected to a second return terminal for the second squib loop and the ground;
- a testing current source being connected to source current to the first feed terminal for the first squib loop and return current through the second feed terminal for the second squib loop;
- a voltage measurement circuit configured to measure a voltage between the first feed terminal and the second feed terminal.
3 more elements
A system for diagnosing leakage in a dual squib loop with a common feed line, the system comprising;
- a first high side driver connected to a firing voltage source and a first feed terminal for the first squib loop;
- a first low side driver connected to a first return terminal for the first squib loop and a ground;
- a second high side driver connected to the firing voltage source and a second feed terminal for second squib loop;
- a second low side driver connected to a second return terminal for the second squib loop and the ground;
- a testing current source being connected to source current to the first return terminal for the first squib loop and return current through the second return terminal for the second squib loop;
- a voltage measurement unit configured to measure a voltage between the first return terminal and the second return terminal.
3 more elements
Dependencies are inferred from the claim text.