US 10,309,336 B2 · Control device for fuel injection valve

Abstract

The present invention determines whether multi-stage injection control is operating normally or abnormally, and carries out a failsafe of multi-stage injection control as necessary. The present invention, which solves the problem described above, has means such as the following. The invention is provided with fuel injection valves provided respectively to each cylinder, an opened/closed valve detection means for detecting either one or both of an open valve state and a closed valve state of the fuel injection valves on the basis of the drive currents or drive voltages of the fuel injection valves, and a detection execution determination means for determining a detection execution time period including the detection start timing and the detection end timing of the open valve state or closed valve state; detection interference such as overlapping detection with another cylinder and overlapping of open valve detection and closed valve detection being preventable, and risks such as erroneous detection being reducible.

Claims15

Dependent claims

A control device of a fuel injection valve that controls the fuel injection valve for injecting fuel to an internal combustion engine according to a control command, comprising;

a calculation processing device configured to execute program related to control of the fuel injection valve, wherein;
the control device is configured to determine whether an operation count of the fuel injection valve is at least equal to a number of times of injection indicated by the control command on the basis of a parameter that indicated an operation state of the fuel injection valve,
the calculation processing device is configured to determine the operation count of the fuel injection valve for an operation corresponding to the control command on the basis of the parameter that indicates the operation state of the fuel injection valve,
the control device of the fuel injection valve is configured to inject the fuel plural times in one combustion cycle of the internal combustion engine,
the control device of the injection valve configured to determine whether the fuel injection valve performs a number of injections that is at least equal to the number of times of injection indicated by the control command on the of the parameter, and
the control device of the fuel injection valve is configured such that, in a case where it is determined that the fuel injection valve does not perform an operation corresponding to the control command, the control device implements at least one of forbidding a divided multi-stage injection, notifying an operator of a vehicle, storing a log correcting the fuel injection amount in one combustion cycle, and correcting a fuel injection timing.

3 more elements

A control device of a fuel injection valve that controls the fuel injection valve for injecting fuel to an internal combustion engine according to a control command, comprising:

a calculation processing device configured to execute a program related to the control of the fuel injection valve, wherein
the control device is configured to determine whether an operation count of the fuel injection valve is at least equal to a number of times of injection indicated by the control command on the basis of a parameter that indicates an operation state of the fuel injection valve,
the calculation processing device is configured to determine the operation count of the fuel injection valve for an operation corresponding to the control command on the basis of the parameter that indicates the operation state of the fuel injection valve,
the control device of the fuel injection valve is configured to inject the fuel plural times in one combustion cycle of the internal combustion engine,
the control device of the fuel injection valve is configured to determine whether the fuel injection valve performs a number of injections that is at least equal to the number of times of injection indicated by the control command on the basis of the parameter,
the control device of the fuel injection valve is configured such that, when the control device performs an injection control plural times in one combustion cycle, at least one of the number of times of a normal operation or the number of times of an abnormal operation is calculated,
the control device of the fuel injection valve is configured to compare the number of times of injection indicated by the control command to at least one of an operation count for a normal operation or an operation count for an abnormal operation, and
the control device of the fuel injection valve is configured such that:
in a case where the number of times of injection indicated by the control command is matches the operation count for the normal operation, or in a case where a value obtained by subtracting the operation count for the abnormal operation from a number of times of multi-stage injection indicated by the control command is equal to the number of times of injection indicated by the control command, the control device of the fuel injection valve determines that the injection control is normally performed, and
in a case where the number of times of injection indicated by the control command does not match the operation count for the normal operation, or in a case where the value obtained by subtracting the operation count for the abnormal operation from the number of times of injection indicated by the control command does not equal the number of times of injection indicated by the control command, the control device of the fuel injection valve determines that the injection control is abnormally performed.

7 more elements

Dependencies are inferred from the claim text.

Control device for fuel injection valve

Life of this patent

Control device for fuel injection valve

Life of this patent

Abstract

Claims15