18008013. DRIVE CONTROL APPARATUS FOR ELECTRIC VEHICLE simplified abstract (SUBARU CORPORATION)
DRIVE CONTROL APPARATUS FOR ELECTRIC VEHICLE
Organization Name
Inventor(s)
Yuichiro Higashiji of Tokyo (JP)
DRIVE CONTROL APPARATUS FOR ELECTRIC VEHICLE - A simplified explanation of the abstract
This abstract first appeared for US patent application 18008013 titled 'DRIVE CONTROL APPARATUS FOR ELECTRIC VEHICLE
Simplified Explanation
The patent application describes a drive control apparatus for an electric vehicle that includes a controller to manage the engine, traveling motor, transmission, and output clutch. The controller estimates the motor's rotation angle using a specific method and adjusts the motor's operation based on this estimation.
- The controller can estimate the motor's rotation angle when its speed is at a certain threshold or higher.
- In case the rotation angle sensor for the motor malfunctions and a specific driving state occurs, the controller adjusts the engine, transmission, and output clutch differently to maintain the motor's speed above the threshold.
- The specific driving state refers to a situation where the motor's speed falls below the threshold under normal sensor conditions.
Key Features and Innovation
- Controller estimates motor rotation angle for control.
- Different control strategies based on sensor state and driving conditions.
- Maintains motor speed above a threshold for optimal performance.
Potential Applications
This technology can be applied in electric vehicles to enhance drive control systems, ensuring optimal performance and safety on the road.
Problems Solved
- Addressing abnormal sensor states in electric vehicles.
- Maintaining motor speed for efficient operation.
Benefits
- Improved control and performance of electric vehicles.
- Enhanced safety and reliability on the road.
Commercial Applications
Electric vehicle manufacturers can integrate this drive control technology into their vehicles to enhance performance and safety, potentially attracting environmentally conscious consumers.
Questions about Drive Control Apparatus
How does the controller estimate the motor's rotation angle?
The controller estimates the motor's rotation angle using a specific method when the motor's speed is at a certain threshold or higher.
What happens when the rotation angle sensor for the motor is in an abnormal state?
When the rotation angle sensor malfunctions and a specific driving state occurs, the controller adjusts the engine, transmission, and output clutch differently to maintain the motor's speed above the threshold.
Original Abstract Submitted
A drive control apparatus for an electric vehicle includes a controller that controls an engine, a traveling motor, a transmission, and an output clutch. The controller estimates the rotation angle of the motor by a first estimation method and controls the motor on the basis of the estimated angle. The estimation method is executable when the rotation speed of the motor is a threshold or higher. When a rotation angle sensor for the motor is in an abnormal state and a specific driving state is present, the controller controls one or more of the engine, the transmission, and the output clutch differently from when the sensor is in a normal state, and thereby maintains the rotation speed at the threshold or higher. The specific driving state is a state in which the rotation speed is lower than the threshold under the control when the sensor is in the normal state.
