Louis Yizhang Liu

Title: Innovations by Louis Yizhang Liu

Introduction

Louis Yizhang Liu is an accomplished inventor based in Troy, MI (US). He has made significant contributions to the field of engineering, particularly in the automotive sector. With a total of 2 patents to his name, Liu has developed innovative solutions that enhance engine performance and control systems.

Latest Patents

Liu's latest patents include a method for misfire detection in internal combustion engines. This invention involves acquiring a series of acceleration data that represent the engine's behavior. The data is sampled to obtain acceleration data samples at a rate sufficient to capture up to fourth-order perturbations. These samples are then filtered to provide bandwidth-limited data, which is processed through at least two channels. The first channel enhances harmonic phenomena through pattern matching, while the second channel enhances random phenomena through pattern cancellation. This method allows for the detection of hard and random misfires based on the magnitude of the filtered acceleration data samples. Additionally, a third channel can be added to detect multiple misfires.

Another notable patent by Liu is related to tracking control for electronic throttle systems. This electronic throttle controller incorporates feedforward control, PID control, and sliding mode control. The PID control generates a feedback term that compensates for error signals, while the sliding mode control generates another feedback term that incorporates a solution to a Lyapunov equation. The combination of these controls generates a robust control signal for electronic throttle systems.

Career Highlights

Liu is currently employed at Motorola Corporation, where he continues to innovate and develop advanced technologies. His work has significantly impacted the automotive industry, particularly in improving engine efficiency and control mechanisms.

Collaborations

Liu has collaborated with notable colleagues, including Jeffrey D Naber and Hanlong Yang. These partnerships have fostered a creative environment that encourages the development of groundbreaking technologies.

Conclusion

Louis Yizhang Liu is a prominent inventor whose work in misfire detection and electronic throttle control has advanced automotive technology. His contributions continue to influence the industry, showcasing the importance of innovation in engineering.