Igniter and vehicle provided with the same
AssigneeRohm Co., Ltd.
InventorsAkira Daicho, Atsushi Taguchi
Life of this patent
Estimating the term…
Abstract
An igniter includes a switch element with input, output control electrodes, a first lead in contact with the input electrode and connected to a primary coil of an ignition coil, a second lead that is grounded, a third lead spaced apart from the first and second leads, a first bonding wire connecting the output electrode and the third lead, a second bonding wire connecting the third lead and the second lead, and a control IC that drives the switch element based on an ignition instruction signal from an engine control unit. The control IC generates an ignition confirmation signal based on the voltage of the third lead, and outputs the signal to the engine control unit.
Claims30
An igniter comprising:
- a switch element provided with an input electrode, an output electrode and a control electrode;
- a first lead held in contact with the input electrode of the switch element and electrically connected to a primary coil of an ignition coil;
- a second lead that is grounded;
- a third lead spaced apart from the first lead and the second lead;
- a first bonding wire connecting the output electrode and the third lead to each other;
- a second bonding wire connecting the third lead and the second lead to each other;
- and
- a control IC that drives the switch element based on an ignition instruction signal from an engine control unit and that generates an ignition confirmation signal based on a voltage of the third lead, the ignition confirmation signal being outputted to the engine control unit.
An igniter comprising:
- an output terminal connected to a primary coil of an ignition coil;
- a ground terminal that is grounded;
- a switch element connected between the output terminal and the ground terminal;
- a current detection resistor connected between the switch element and the ground terminal;
- an input terminal to which an ignition instruction signal from an engine control unit is inputted;
- and
- a control circuit that drives the switch element based on the ignition instruction signal;
- wherein the control circuit comprises:
- a reference voltage resistor including a terminal connected to a low potential terminal of the current detection resistor, the reference voltage resistor producing a reference voltage;
- a comparator including a detection voltage input terminal, a reference voltage input terminal and a comparison result output terminal, the detection voltage input terminal being connected to a high potential terminal of the current detection resistor, the reference voltage input terminal being connected to another terminal of the reference voltage resistor, the comparison result output terminal outputting a comparison result signal generated in accordance with comparison between a voltage inputted to the detection voltage input terminal and a voltage inputted to the reference voltage input terminal;
- and
- a capacitor connected between the detection voltage input terminal and the reference voltage input terminal,
- wherein the control circuit generates an ignition confirmation signal to be outputted to the engine control unit based on the comparison result signal.
Dependencies are inferred from the claim text.