1. A multi-ring gas burner for a cooktop appliance, the multi-ring gas burner defining a radial direction, the multi-ring gas burner comprising:
an inner burner ring;
an outer burner ring spaced apart from said inner burner ring along the radial direction;
a carryover slot extending between about said inner burner ring and about said outer burner ring, said carryover slot comprising a plurality of passages dispersed along the radial direction between said inner and outer burner rings, each passage of the plurality of passages having an inlet for receiving gaseous fuel; and
means for increasing a velocity and decreasing a pressure of fuel at a pair of inlets of the plurality of passages.
2. The multi-ring gas burner of claim 1, wherein said carryover slot is configured for carrying flames between said inner and outer burner rings.
3. A multi-ring gas burner for a cooktop appliance; the multi-ring gas burner defining a radial direction and a circumferential direction, the multi-ring gas burner comprising:
an inner burner ring;
an outer burner ring spaced apart from said inner burner ring along the radial direction;
a carryover slot extending between said inner and outer burner rings, said carryover slot comprising a plurality of passages dispersed along the radial direction between said inner and outer burner rings, each passage of the plurality of passages having an inlet for receiving gaseous fuel; and
a pair of restrictors define a Venturi throttle therebetween, each restrictor of said pair of restrictors positioned at a respective one of the inlets of the plurality of passages, each restrictor of said pair of restrictors having a throttling surface, the throttling surfaces of said pair of restrictors spaced apart from each other along the radial direction by a distance, D, the distance D varying along the circumferential direction.
4. The multi-ring gas burner of claim 3, wherein at least one inlet of the plurality of passages does not have a restrictor mounted thereat.
5. The multi-ring gas burner of claim 3, wherein said outer burner ring has a top surface and a bottom surface positioned opposite each other on said outer burner ring, the carryover slot positioned at the top surface of said outer burner ring, said pair of restrictors positioned at the bottom surface of said outer burner ring.
6. The multi-ring gas burner of claim 5, wherein the passages of the plurality of passages extend between the top and bottom surfaces of said outer burner ring in order to supply gaseous fuel from the Venturi throttle of said pair of restrictors to said carryover slot.
7. The multi-ring gas burner of claim 3, wherein the restrictors of said pair of restrictors are spaced apart from each other along the radial direction.
8. The multi-ring gas burner of claim 3, wherein said carryover slot is configured for carrying flames between said inner burner ring and said outer burner ring, wherein the Venturi throttle of said pair of restrictors is configured for regulating a flow of gaseous fuel to said carryover slot.
9. A multi-ring gas burner for a cooktop appliance, the multi-ring gas burner defining a radial direction, the multi-ring gas burner comprising:
an inner burner ring defining a plurality of outlets for directing gaseous fuel out of said inner burner ring;
an outer burner ring spaced apart from said inner burner ring along the radial direction, said outer burner ring defining a plurality of outlets for directing gaseous fuel out of said outer burner ring, said outer burner ring having a cover that defines a carryover slot and a plurality of passages for supplying gaseous fuel to the carryover slot, the carryover slot of the cover extending between about said inner burner ring and about said outer burner ring, each passage of the plurality of passages having an inlet for receiving gaseous fuel; and
a pair of restrictors mounted to the cover of said outer burner ring, each restrictor of said pair of restrictors positioned at a respective one of the inlets of the plurality of passages, said pair of restrictors defining a Venturi throttle therebetween,
wherein at least one inlet of the plurality of passages does not have a restrictor mounted thereat.
10. The multi-ring gas burner of claim 9, wherein the passages of the plurality of passages are spaced apart from one another along the radial direction.
11. The multi-ring gas burner of claim 9, wherein the cover of said outer burner ring has a top surface and a bottom surface positioned opposite each other on the cover of said outer burner ring, the carryover slot positioned at the top surface of the cover, said pair of restrictors positioned at the bottom surface of the cover.
12. The multi-ring gas burner of claim 11, wherein the passages of the plurality of passages extend between the top surface of the cover and the bottom surface in order to supply gaseous fuel from the Venturi throttle of said pair of restrictors to the carryover slot of said outer burner ring.
13. The multi-ring gas burner of claim 9, wherein the restrictors of said pair of restrictors are spaced apart from each other along the radial direction.
14. The multi-ring gas burner of claim 9, wherein each passage of the plurality of passages has an outlet positioned within the carryover slot of said outer burner ring.
15. The multi-ring gas burner of claim 9, wherein the carryover slot of said outer burner ring is configured for carrying flames between said inner burner ring and said outer burner ring, wherein the Venturi throttle of said pair of restrictors is configured for regulating a flow of gaseous fuel into the respective inlets of the plurality of passages.
16. The multi-ring gas burner of claim 9, wherein the multi-ring gas burner defines a circumferential direction, each restrictor of said pair of restrictors having a throttling surface, the throttling surfaces of said pair of restrictors spaced apart from each other along the radial direction by a distance, D, the distance D varying along the circumferential direction.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. Fuel injection system comprising a piezoelectric element (10, 20, 30, 40, 50 or 60) for controlling the amount of injected fuel, characterized in that the fuel injection system comprises a control unit (D) for determination of a possible fault of the piezoelectric element (10, 20, 30, 40, 50 or 60) or of an electric circuitry driving the piezoelectric element (10, 20, 30, 40, 50 or 60) based upon a value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60).
2. Fuel injection system according to claim 1 with at least two piezoelectric elements (10, 20, 30, 40, 50 or 60) for controlling the amount of injected fuel, characterized in that the control unit (D) is able to determine a possible fault of at least one of the piezoelectric elements (10, 20, 30, 40, 50 or 60) or the electric circuitry driving the piezoelectric elements (10, 20, 30, 40, 50 or 60) based upon on values related to the capacitances of the at least two piezoelectric elements (10, 20, 30, 40, 50 or 60).
3. Fuel injection system according to claim 1 or 2, wherein the piezoelectric element (10, 20, 30, 40, 50 or 60) is charged from a first voltage to a second voltage, characterized in that the control unit determines the value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60) based upon the first voltage and the second voltage.
4. Fuel injection system according to claim 1, 2, or 3, wherein the piezoelectric element (10, 20, 30, 40, 50 or 60) is charged from a first voltage to a second voltage within a charging time, characterized in that the control unit determines the value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60) based upon the charging time, and, in particular an estimated value of, a current charging the piezoelectric element (10, 20, 30, 40, 50 or 60).
5. Fuel injection system according to claim 1, 2, 3, or 4, characterized in that the control unit determines the value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60) based upon the charge the piezoelectric element (10, 20, 30, 40, 50 or 60) is carrying.
6. Fuel injection system according to claim 1, 2, 3, 4 or 5, characterized in that the control unit determines the value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60) based upon the quotient of the second voltage and the charge the piezoelectric element (10, 20, 30, 40, 50 or 60) is carrying, based upon the quotient of the charge the piezoelectric element (10, 20, 30, 40, 50 or 60) is carrying and the second voltage, based upon the quotient of the difference between the second voltage and the first voltage and the product of the charging time and the current charging the piezoelectric element (10, 20, 30, 40, 50 or 60), or based upon the quotient of the product of the charging time and the current charging the piezoelectric element (10, 20, 30, 40, 50 or 60) and the difference between the second voltage and the first voltage.
7. Fuel injection system according to one of the foregoing claims, wherein the piezoelectric element (10, 20, 30, 40, 50 or 60) is discharged from a second voltage to a third voltage, characterized in that the control unit determines the value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60) based upon the second voltage and the third voltage.
8. Fuel injection system according to one of the foregoing claims, wherein the piezoelectric element (10, 20, 30, 40, 50 or 60) is discharged from a second voltage to a third voltage within a discharging time, characterized in that the control unit determines the value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60) based upon the discharging time, and, in particular an estimated value of, a current discharging the piezoelectric element (10, 20, 30, 40, 50 or 60).
9. Fuel injection system according to one of the foregoing claims, characterized in that the control unit determines the value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60) based upon the quotient of the third voltage and the charge the piezoelectric element (10, 20, 30, 40, 50 or 60) is carrying, based upon the quotient of the charge the piezoelectric element (10, 20, 30, 40, 50 or 60) is carrying and the third voltage, based upon the quotient of the difference between the second voltage and the third voltage and the product of the discharging time and the current discharging the piezoelectric element (10, 20, 30, 40, 50 or 60), or based upon the quotient of the product of the discharging time and the current discharging the piezoelectric element (10, 20, 30, 40, 50 or 60) and the difference between the second voltage and the third voltage.
10. Fuel injection system according to claim 7, 8, or 9, characterized in that the third voltage equals the first voltage.
11. Fuel injection system according to one of the foregoing claims, characterized in that the control unit is able to determine a possible fault of the piezoelectric element (10, 20, 30, 40, 50 or 60) or electric circuitry driving the piezoelectric element (10, 20, 30, 40, 50 or 60) based upon a calculated value of the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60) and a value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60) at a former stage, in particular based upon a comparison of the value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60) and a former value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60).
12. Fuel injection system according to one of the foregoing claims wherein the fuel injection system comprises a switch (11, 21,31, 41, 51 or 61) for discharging the piezoelectric element (10, 20, 30, 40, 50 or 60), characterized in that the control unit is able to determine a possible short cut of the switch (11, 21,31, 41, 51 or 61) based upon the value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60).
13. Method for operating a fuel injection system comprising a piezoelectric element (10, 20, 30, 40, 50 or 60) for controlling the amount of injected fuel, in particular for operating a fuel injection system according to one of the foregoing claims, characterized in that a possible fault of the piezoelectric element (10, 20, 30, 40, 50 or 60) or an electric circuitry driving the piezoelectric element (10, 20, 30, 40, 50 or 60) is determined based upon a value related to the capacitance of the piezoelectric element (10, 20, 30, 40, 50 or 60).