Control apparatus for fuel cell vehicle and control method for fuel cell vehicle
First Claim
1. A control apparatus for a fuel cell vehicle comprising:
- a motor which drives a vehicle;
a motor control device which controls driving and regenerative operations of the motor;
a fuel cell which serves as a fuel cell system constituting a power source for the motor, which generates power by an electrochemical reaction using reaction gas supplied from a reaction gas supply device;
an accumulator which is charged by a power generation of the fuel cell and a regenerative power from the motor;
an output control device which controls an output of the fuel cell;
a voltage reduction degree prediction device which predicts a reduction degree of system voltage according to an operational state of the motor; and
a motor output restriction device which restricts a motor output according to the reduction degree of the system voltage predicted by the voltage reduction degree prediction device.
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Accused Products
Abstract
A management ECU of a control unit predicts the reduction degree of a system voltage according to an operational state of a motor based on the temperature of a fuel cell and a number of rotations of the motor, sets motor output restriction start voltage and motor output restriction end voltage which are threshold values of the system voltage for triggering an execution start and an execution end of a processing to restrict an output of the motor, and outputs them to a motor ECU. The motor ECU sets an output restriction coefficient that is a restriction rate in restricting the output of the motor based on a detected value of the system voltage and the motor output restriction start voltage and the motor output restriction end voltage, and restricts the output of the motor.
21 Citations
16 Claims
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1. A control apparatus for a fuel cell vehicle comprising:
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a motor which drives a vehicle;
a motor control device which controls driving and regenerative operations of the motor;
a fuel cell which serves as a fuel cell system constituting a power source for the motor, which generates power by an electrochemical reaction using reaction gas supplied from a reaction gas supply device;
an accumulator which is charged by a power generation of the fuel cell and a regenerative power from the motor;
an output control device which controls an output of the fuel cell;
a voltage reduction degree prediction device which predicts a reduction degree of system voltage according to an operational state of the motor; and
a motor output restriction device which restricts a motor output according to the reduction degree of the system voltage predicted by the voltage reduction degree prediction device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control method for a fuel cell vehicle, the fuel cell vehicle comprising:
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a motor which drives a vehicle;
a motor control device which controls driving and regenerative operations of the motor;
a fuel cell which serves as a fuel cell system constituting a power source for the motor, for generating power by electrochemical reaction supplied by reaction gas from a reaction gas supply device;
an accumulator which is charged by a power generation of the fuel cell and a regenerative power from the motor; and
an output control device which controls an output of the fuel cell, wherein the method comprises the steps of;
estimating a reduction degree of a system voltage of the fuel cell system according to an operational state of the motor; and
restricting a motor output according to the reduction degree. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification