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 suitably programmed with instructions which, when executed by the voltage reduction degree prediction device, cause the voltage reduction degree prediction device to predict a reduction degree of system voltage according to an operational state of the motor;
a motor output restriction device suitably programmed with instructions which, when executed by the motor output restriction device, cause the motor output restriction device to restrict a motor output according to the reduction degree of the system voltage predicted by the voltage reduction degree prediction device; and
a tachometer which detects a number of rotations of the motor, wherein the voltage reduction degree prediction device is programmed with instructions which, when executed by the voltage reduction degree prediction device, cause the voltage reduction degree prediction device to predict a maximum value of an amount of change in a motor output based on the number of rotations detected by the tachometer.
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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.
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Citations
14 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 suitably programmed with instructions which, when executed by the voltage reduction degree prediction device, cause the voltage reduction degree prediction device to predict a reduction degree of system voltage according to an operational state of the motor; a motor output restriction device suitably programmed with instructions which, when executed by the motor output restriction device, cause the motor output restriction device to restrict a motor output according to the reduction degree of the system voltage predicted by the voltage reduction degree prediction device; and a tachometer which detects a number of rotations of the motor, wherein the voltage reduction degree prediction device is programmed with instructions which, when executed by the voltage reduction degree prediction device, cause the voltage reduction degree prediction device to predict a maximum value of an amount of change in a motor output based on the number of rotations detected by the tachometer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification