CONTROL APPARATUS FOR VEHICULAR POWER TRANSMITTING SYSTEM
1 Assignment
0 Petitions
Accused Products
Abstract
It is provided a control apparatus for a vehicle provided with an electric motor power source, an inverter, an electric motor, an inverter smoothing capacitor, and a step-variable automatic transmission, the control apparatus being configured to implement a torque reduction control, and to implement a torque reduction limitation control to limit reduction of an output torque of the electric motor to within a range in which a terminal voltage of the inverter smoothing capacitor will not exceed a predetermined withstanding voltage of the inverter and to limit the reduction of the output torque by limiting an amount of change of the output torque per unit time during the reduction of the output torque in the torque reduction control, to within a predetermined torque reduction rate limiting range, and wherein the torque reduction rate limiting range is determined upon initiation of a shifting action of the automatic transmission.
33 Citations
10 Claims
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1-5. -5. (canceled)
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6. A control apparatus for a vehicle provided with an electric motor power source, an inverter, an electric motor connected through said inverter to said electric motor power source, an inverter smoothing capacitor connected to a terminal of said inverter on the side of said electric motor power source to smooth a voltage input from said electric motor power source to the inverter, and a step-variable automatic transmission constituting a part of a power transmitting path between said electric motor and a drive wheel, said control apparatus comprising a torque reduction control portion configured to implement a torque reduction control to temporarily reduce an output torque of said electric motor during a shifting action of said automatic transmission, with respect to an output torque of the electric motor before initiation of the shifting action, said control apparatus further comprising:
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a torque reduction limitation control portion configured to implement a torque reduction limitation control to limit reduction of the output torque of said electric motor to within a range in which a terminal voltage of said inverter smoothing capacitor which rises in relation to reduction of the output torque of said electric motor in said torque reduction control will not exceed a predetermined withstanding voltage of said inverter;
,said torque reduction limitation control portion implements said torque reduction limitation control to limit the reduction of the output torque of said electric motor by limiting an amount of change of the output torque of said electric motor per unit time during the reduction of the output torque of said electric motor in said torque reduction control, to within a predetermined torque reduction rate limiting range in which the terminal voltage of said inverter smoothing capacitor will not exceed said predetermined withstanding voltage, and wherein said torque reduction rate limiting range is determined upon initiation of the shifting action of the said automatic transmission. - View Dependent Claims (7, 8, 9)
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10. A control apparatus for a vehicle provided with an electric motor power source, an inverter, an electric motor connected through said inverter to said electric motor power source, an inverter smoothing capacitor connected to a terminal of said inverter on the side of said electric motor power source to smooth a voltage input from said electric motor power source to the inverter, and a step-variable automatic transmission constituting a part of a power transmitting path between said electric motor and a drive wheel, said control apparatus comprising a torque reduction control portion configured to implement a torque reduction control to temporarily reduce an output torque of said electric motor during a shifting action of said automatic transmission, with respect to an output torque of the electric motor before initiation of the shifting action, said control apparatus further comprising:
a torque reduction limitation control portion configured to implement a torque reduction limitation control to limit reduction of the output torque of said electric motor to within a range in which a terminal voltage of said inverter smoothing capacitor which rises in relation to reduction of the output torque of said electric motor in said torque reduction control will not exceed a predetermined withstanding voltage of said inverter.
Specification