Back to results
US 9,850,866 B2Granted
Heater control apparatus for diesel fuel filter and driving method thereof
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsJaebum Yoo, Tae Young Kim, Sang Il Yoon
Life of this patent
Estimating the term…
Abstract
A heater control apparatus for a diesel fuel filter according to an exemplary embodiment of the present disclosure includes a fuel temperature sensor for sensing a temperature of diesel fuel, a main relay including a first internal coil and a first switch, a pre-filter heater relay including a second internal coil and a second switch; a first node, a second node, a third node, and an engine control unit (ECU).
Claims13
A heater control apparatus for a diesel fuel filter, comprising:
- a fuel temperature sensor for sensing a temperature of diesel fuel;
- a main relay including a first internal coil and a first switch;
- a pre-filter heater relay including a second internal coil and a second switch;
- a first node to which a positive terminal of a battery, one end of the first internal coil, one end of the first switch, and one end of the second switch are connected;
- a second node to which the other end of the first switch and one end of the second internal coil are connected;
- a third node to which the other end of the second switch, an anode of a first diode, and a pre-filter heater are connected;
- and
- an engine control unit (ECU) including a first switching element connected to the other end of the first internal coil, a second switching element connected to the other end of the second internal coil, and a first monitoring terminal connected to a cathode of the first diode,
- wherein when an ignition switch is turned on, the ECU turns on the first switching element, turns on or off the second switching element on the basis of the temperature of the diesel fuel, and determines whether the pre-filter heater relay has an error by checking a current flowing in the first diode through the first monitoring terminal.
6 more elements
A method for driving a heater control apparatus for a diesel fuel filter including a fuel temperature sensor for sensing a temperature of diesel fuel;
- a main relay including a first internal coil and a first switch;
- a pre-filter heater relay including a second internal coil and a second switch;
- a first node to which a positive terminal of a battery, one end of the first internal coil, one end of the first switch, and one end of the second switch are connected;
- a second node to which the other end of the first switch and one end of the second internal coil are connected;
- a third node to which the other end of the second switch, an anode of a first diode, and a pre-filter heater are connected;
- and an engine control unit (ECU) including a first switching element connected to the other end of the first internal coil, a second switching element connected to the other end of the second internal coil, and a first monitoring terminal connected to a cathode of the first diode, the method comprising:
- when an ignition switch is turned on, turning on the first switching element;
- turning on or turning off the second switching element on the basis of the temperature of the diesel fuel;
- and
- determining whether the pre-filter heater relay has an error by checking a current flowing in the first diode through the first monitoring terminal.
7 more elements
A method for driving a heater control apparatus for a diesel fuel filter including a fuel temperature sensor for sensing a temperature of diesel fuel;
- a main relay including a first internal coil and a first switch;
- a pre-filter heater relay including a second internal coil and a second switch;
- a main filter heater relay including a third internal coil and a third switch;
- a first node to which a positive terminal of a battery, one end of the first internal coil, one end of the first switch, one end of the second switch, and one end of the third switch are connected;
- a second node to which the other end of the first switch, one end of the second internal coil, and one end of the third internal coil are connected;
- a third node to which the other end of the second switch, an anode of a first diode, and a pre-filter heater are connected;
- a fourth node to which the other end of the third switch, an anode of a second diode, and a main filter heater are connected;
- and an engine control unit (ECU) including a first switching element connected to the other end of the first internal coil, a second switching element connected to the other end of the second internal coil, a third switching element connected to the other end of the third internal coil, a first monitoring terminal connected to a cathode of the first diode, and a second monitoring terminal connected to a cathode of the second diode, the method comprising:
- when an ignition switch is turned on, turning on the first switching element;
- turning on or turning off the second switching element on the basis of the temperature of the diesel fuel;
- and
- determining whether the main filter heater relay has an error by checking a current flowing in the second diode through the second monitoring terminal.
9 more elements
Dependencies are inferred from the claim text.