US 12,589,749 B2 · Powertrain, control apparatus and motor control unit

Abstract

A powertrain, a control apparatus, and a motor control unit. The powertrain includes a drive motor and a transmission device. The transmission device disconnects a transmission connection between the drive motor and a wheel based on a result of a comparison between a temperature or a viscosity of a lube oil and a preset parameter value, and a rotational speed of the drive motor varies with the result of the comparison between the temperature or the viscosity of the lube oil and the preset parameter value. The drive motor stirs the lube oil through idling, to make the temperature of the lube oil rise rapidly. The powertrain, the control apparatus and the motor control unit provided can improve fluidity of the lube oil at very low temperatures, so that a lube oil pump can be started smoothly.

Claims20

Dependent claims

A powertrain for an electric vehicle, comprising:

a drive motor;
and
a transmission device, wherein the drive motor drives a wheel of the electric vehicle through the transmission device, and a transmission structure of the drive motor and a transmission structure of the transmission device are lubricated by using a lube oil;
the transmission device disconnects a transmission connection between the drive motor and the wheel based on a result of a comparison between a lube oil parameter value and a preset parameter value, and a rotor of the drive motor rotates;
and
the lube oil parameter comprises at least one of a temperature of the lube oil and a viscosity of the lube oil.

3 more elements

A control apparatus for an electric vehicle, wherein the electric vehicle comprises a drive motor, a transmission device, and a motor control unit, the drive motor drives a wheel of the electric vehicle through the transmission device, a transmission structure of the drive motor and a transmission structure of the transmission device are lubricated by using a lube oil, the motor control unit comprises a power module, the power module is configured to output a drive current to the drive motor, and the control apparatus is configured to:

send a control signal, based on a result of a comparison between a lube oil parameter value and a preset parameter value, to control the transmission device to disconnect a transmission connection between the drive motor and the wheel, and
control the power module to output the drive current to the drive motor, to rotate a rotor of the drive motor.

A motor control unit for a control apparatus of an electric vehicle, wherein the electric vehicle comprises a drive motor and a transmission device, the drive motor drives a wheel of the electric vehicle through the transmission device, a transmission structure of the drive motor and a transmission structure of the transmission device are lubricated by using a lube oil, the motor control unit comprises a power module, the power module is configured to output a drive current to the drive motor, and the control apparatus is configured to:

send a control signal, based on a result of a comparison between a lube oil parameter value and a preset parameter value, to control the transmission device to disconnect a transmission connection between the drive motor and the wheel, and
control the power module to output the drive current to the drive motor, to rotate a rotor of the drive motor.

Dependencies are inferred from the claim text.

Powertrain, control apparatus and motor control unit

Life of this patent

Powertrain, control apparatus and motor control unit

Life of this patent

Abstract

Claims20