Shift device and vehicle electronic control unit

Patent metadata

Field	Value
Publication number	US-12247657-B2
Application number	US-202118015908-A
Country	US
Kind code	B2
Filing date	Oct 19, 2021
Priority date	Oct 23, 2020
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A shift device includes: a motor drive circuit; a motor driver unit for driving the motor drive circuit; a control unit that controls the motor driver unit; a motor power supply path; a system power supply path; and a buck-boost unit that converts electric power supplied from the system power supply path to a predetermined voltage and outputs the voltage. Electric power is supplied to the control unit via the buck-boost unit, and either the electric power from the motor power supply path or the electric power from the system power supply path is supplied to the motor driver unit based on a voltage.

First claim

The invention claimed is:

1. A shift device, comprising:
a switching unit that controls operation of a motor that drives a speed change mechanism;
a motor driver unit for driving the switching unit;
a control unit that controls the motor driver unit;
a motor power supply path that supplies electric power to the switching unit;
a system power supply path that supplies electric power to the control unit; and
a buck-boost unit that is provided in the system power supply path and that converts the electric power supplied from the system power supply path to a predetermined voltage and output the voltage, wherein
electric power is supplied to the control unit via the buck-boost unit, and
the electric power supplied to the motor driver unit is changed from the system power supply path to the motor power supply path based on a voltage.

2. The shift device according to claim 1 , wherein
the shift device is a shift-by-wire shift device for a vehicle, and
either the electric power from the motor power supply path or the electric power output from the buck-boost unit is supplied to the motor driver unit based on the voltage.

3. The shift device according to claim 2 , wherein when a first voltage in the motor power supply path is higher than a second voltage output from the buck-boost unit, the electric power from the motor power supply path is supplied to the motor driver unit.

4. The shift device according to claim 3 , wherein when the first voltage in the motor power supply path is lower than the second voltage output from the buck-boost unit, electric power converted to the second voltage by the buck-boost unit is supplied to the motor driver unit.

5. The shift device according to claim 1 , wherein
the motor power supply path and an output side of the buck-boost unit are connected to each other via a diode,
the diode includes a first diode provided in the motor power supply path and a second diode provided on the output side of the buck-boost unit, and
either the electric power from the motor power supply path and via the first diode or the electric power output from the buck-boost unit and via the second diode is supplied to the motor driver unit via the diode based on the voltage.

6. The shift device according to claim 1 , wherein a current path for supplying electric power from a power supply outside the device branches inside the device into the motor power supply path and the system power supply path.

7. A vehicle electronic control unit, comprising:
a switching unit that controls operation of a motor;
a motor driver unit for driving the switching unit;
a control unit that controls the motor driver unit;
a motor power supply path that supplies electric power to the switching unit;
a system power supply path that supplies electric power to the control unit; and
a buck-boost unit that is provided in the system power supply path and that converts the electric power supplied from the system power supply path to a predetermined voltage and output the voltage, wherein
electric power is supplied to the control unit via the buck-boost unit, and
the electric power supplied to the motor driver unit is changed from the system power supply path to the motor power supply path based on a voltage.

Assignees

• Aisin Corp

Inventors

• Matsubara Masaru
• Miyake Motofumi
• Takagi Kazunori

Classifications

• H02P2201/07

  DC-DC step-up or step-down converter inserted between the power supply and the inverter supplying the motor, e.g. to control voltage source fluctuations, to vary the motor speed · CPC title

• F16H2061/326

  Actuators for range selection, i.e. actuators for controlling the range selector or the manual range valve in the transmission · CPC title

• H02P23/183

  of one shaft without controlling the prime mover · CPC title

• F16H61/0006

  Electronic control units for transmission control, e.g. connectors, casings or circuit boards · CPC title

• F16H2061/122

  Avoiding failures by using redundant parts · CPC title