Back to results
US 11,585,306 B2Granted
Injection control device
AssigneeDenso Corporation
InventorMasashi Inaba
Life of this patent
Estimating the term…
Abstract
An injection control device includes an injector and a detection unit. The injector includes: an injection hole; a movable part; a seat portion; a valve housing; a magnetic field application unit; and a detection sensor. The movable part opens and closes the injection hole by reciprocal movement. The seat portion when seated by the movable part closes the injection hole, and when the movable part lifted therefrom opens the injection hole. The valve housing accommodates the movable part in a reciprocally movable manner. The magnetic field application unit is installed on an outer circumference of the valve housing and applies a magnetic field to the movable part and the valve housing. The detection sensor outputs a detection signal according to a size of a distance between the valve housing and the movable part.
Claims31
An injection control device comprising:
- an injector including:
- an injection hole;
- a movable part opening and closing the injection hole by reciprocal movement;
- a seat portion having the injection hole, wherein the injection hole is closed when the movable part is seated and the injection hole is open when the movable part is lifted;
- a valve housing accommodating the movable part in a reciprocally movable manner;
- and
- a magnetic field application unit installed on an outer circumference of the valve housing and applying an AC (alternating current) magnetic field to the movable part and the valve housing;
- a detection sensor outputting, as a detection signal, an induced electromotive force having a same frequency as the AC magnetic field applied by the magnetic field application unit and generated according to a size of a distance, which is a magnetic gap, between the valve housing and the movable part by the AC magnetic field applied by the magnetic field application unit,
- a detection unit detecting a position of the movable part in a reciprocal movement direction based on the detection signal output by the detection sensor when the movable part closes the injection hole;
- and
- a control device configured to receive the position of the movable part in the reciprocal movement direction detected by the detection unit,
- wherein
- the detection unit performs lock-in detection by the detection signal and a reference signal having the same frequency as the AC magnetic field applied by the magnetic field application unit.
10 more elements
An injection control device comprising:
- an injector including:
- an injection hole;
- a movable part opening and closing the injection hole by reciprocal movement;
- a seat portion having the injection hole, wherein the injection hole is closed when the movable part is seated and the injection hole is open when the movable part is lifted;
- a valve housing accommodating the movable part in a reciprocally movable manner;
- a magnetic field application unit installed on an outer circumference of the valve housing and applying a magnetic field to the movable part and the valve housing;
- and
- a detection sensor outputting a detection signal according to a size of a distance between the valve housing and the movable part by the magnetic field applied by the magnetic field application unit;
- a detection unit detecting a position of the movable part in a reciprocal movement direction based on the detection signal output by the detection sensor when the movable part closes the injection hole;
- and
- a control device configured to receive the position of the movable part in the reciprocal movement direction detected by the detection unit,
- wherein
- two or more sets of the magnetic field application unit and the detection sensor are installed,
- the magnetic field application unit of each set applies an alternating magnetic field of different frequencies to the movable unit and the valve housing, and
- the detection unit performs lock-in detection by the detection signal output by the detection sensor of each set and the reference signal having the same frequency as the AC magnetic field applied by the magnetic field application unit of each set.
12 more elements
An injection control device comprising:
- an injector including:
- an injection hole;
- a movable part opening and closing the injection hole by reciprocal movement;
- a seat portion having the injection hole, wherein the injection hole is closed when the movable part is seated and the injection hole is open when the movable part is lifted;
- a valve housing accommodating the movable part in a reciprocally movable manner;
- a magnetic field application unit installed on an outer circumference of the valve housing and applying a magnetic field to the movable part and the valve housing;
- and
- a detection sensor outputting a detection signal according to a size of a distance between the valve housing and the movable part by the magnetic field applied by the magnetic field application unit;
- a detection unit detecting a position of the movable part in a reciprocal movement direction based on the detection signal output by the detection sensor when the movable part closes the injection hole;
- and
- a control device configured to receive the position of the movable part in the reciprocal movement direction detected by the detection unit,
- wherein
- two or more sets of the magnetic field application unit and the detection sensor are installed, and
- the two sets of the magnetic field application unit and the detection sensor are installed at different positions in the reciprocal movement direction on the outer circumference of the valve housing.
11 more elements
Dependencies are inferred from the claim text.