CONTROL OF TRANSITIONS BETWEEN TRANSMISSION STATES

Organization Name

GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor(s)

Chunhao J. Lee of Troy MI (US)

Dongxu Li of Troy MI (US)

Farzad Samie of Franklin MI (US)

Paul Guillermo Otanez of Franklin MI (US)

Su-Yang Shieh of Clawson MI (US)

CONTROL OF TRANSITIONS BETWEEN TRANSMISSION STATES - A simplified explanation of the abstract

This abstract first appeared for US patent application 18187308 titled 'CONTROL OF TRANSITIONS BETWEEN TRANSMISSION STATES

The abstract describes a system for controlling the transmission state of a vehicle, specifically focusing on distributing propulsion torque and engaging clutches to transition between different transmission states.

Controller connected to first drive system and first transmission
Controller receives request to change transmission state
Propulsion torque distributed to second drive system
First drive system does not provide propulsion torque
Off-going clutch fully released, on-coming clutch fully engaged
Motor speed controlled based on rotational speed relation of target transmission state
Slip speed of on-going clutch reduced

Potential Applications: - Automotive industry for improved transmission control - Electric vehicles for efficient power distribution - Autonomous vehicles for seamless transitions between gears

Problems Solved: - Efficient distribution of propulsion torque - Smooth transition between transmission states - Reduced slip speed of clutches

Benefits: - Enhanced vehicle performance - Improved fuel efficiency - Seamless gear shifting experience

Commercial Applications: Title: Advanced Transmission Control System for Vehicles This technology can be utilized in the automotive industry to enhance the performance and efficiency of vehicles, catering to both traditional and electric vehicle markets. The system's ability to optimize power distribution and clutch engagement can lead to smoother driving experiences and improved fuel economy, making it an attractive option for manufacturers looking to enhance their vehicle offerings.

Prior Art: Prior art related to this technology can be found in patents and research papers focusing on transmission control systems, clutch engagement mechanisms, and power distribution in vehicles. Researchers and engineers in the automotive industry have been exploring ways to improve transmission efficiency and performance, which can provide valuable insights into the development of this system.

Frequently Updated Research: Ongoing research in the field of vehicle transmission systems includes studies on advanced control algorithms, sensor technologies for real-time data analysis, and integration of artificial intelligence for predictive maintenance. These developments can further enhance the capabilities of transmission control systems like the one described in the patent application.

Questions about Advanced Transmission Control System for Vehicles:

1. How does the system ensure smooth transitions between different transmission states? The system controls the distribution of propulsion torque and engages clutches in a coordinated manner to achieve seamless transitions between transmission states.

2. What are the potential benefits of using this advanced transmission control system in electric vehicles? This system can improve power distribution efficiency, leading to enhanced performance and range in electric vehicles.

Original Abstract Submitted

A system for controlling a transmission state of a vehicle includes a controller connected to a first drive system and a first transmission including a gear system, a first clutch and a second clutch. The controller is configured to receive a request to change from an initial transmission state to a target transmission state when a propulsion torque is applied to the vehicle. The controller is configured to distribute the propulsion torque such that all of the propulsion torque is applied by a second drive system and the first drive system does not provide any propulsion torque to the vehicle, fully release an off-going clutch from the gear system, control a motor speed based on a rotational speed relation of the target transmission state to reduce a slip speed of the on-going clutch, and fully engage an on-coming clutch to put the first drive system in the target transmission state.