Control circuit for vehicular power transmission apparatus, and abnormality determining device for the control circuit
AssigneeMitsutishi Fuso Truck and Bus Corporation
InventorsTakeshi Nakamura, Atsushi Kumazawa, Osamu Ogi, Osamu Umemoto
Life of this patent
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Abstract
An interruption circuit capable of interrupting an electrical power fed from a power source unit to a driver circuit in response to an interruption signal from an electronic control unit is interposed between the driver circuit for activating power transmission means and the power source unit. By this arrangement, it is possible to interrupt the electrical power fed from the power source unit to the driver circuit forcibly and prevent unnecessary power consumption and unnecessary action (or a malfunction) of the power transmission means.
Claims8
A control circuit abnormality determining device for a vehicular power transmission apparatus, comprising:
- power transmission means for transmitting a driving force of an engine to an output member;
- an actuator for switching operations of said power transmission means;
- a driver circuit for driving said actuator;
- a power source unit for generating an electric power;
- a power supply circuit for supplying the electric power to said driver circuit;
- interruption means for selectively interrupting the electrical power fed from said power source unit to said driver circuit;
- a control unit for outputting a drive signal to said driver circuit and an interruption signal to said interruption means;
- and
- abnormality determining means for determining an abnormality of the electrical power fed to said driver circuit on the basis of presence and absence of the output of said interruption signal and presence and absence of the electrical power fed to said driver circuit.
A control circuit structure of a vehicular power transmission apparatus, comprising:
- power transmission means for transmitting the driving force of an engine to an output member;
- an actuator for switching operations of said power transmission means;
- a driver circuit for driving said actuator;
- a power source unit for feeding an electrical power to said driver circuit;
- interruption means for interrupting the electrical power fed from said power source unit to said driver circuit selectively;
- and
- a control unit for outputting a drive signal to said driver circuit and an interruption signal to said interruption means.
A control circuit abnormality determining device for a vehicular power transmission apparatus, comprising:
- a driver circuit that drives an actuator that switches operations of a power transmission unit;
- an interruption unit that selectively interrupts an electrical power supplied to said driver circuit;
- a control unit that outputs a drive signal to said driver circuit and an interruption signal to said interruption unit;
- and
- an abnormality determining unit that determines an abnormality of the electrical power supplied to said driver circuit based on presence and absence of said interruption signal and presence and absence of the electrical power supplied to said driver circuit.
Dependencies are inferred from the claim text.