Bradford A Lessard

Title: Innovations by Bradford A Lessard

Introduction

Bradford A Lessard is a notable inventor based in Santee, California. He has made significant contributions to the field of internal combustion engines, particularly through his innovative patent. His work focuses on enhancing the efficiency and performance of larger engines.

Latest Patents

Lessard holds a patent for an air/fuel ratio controller designed for larger internal combustion engines. This apparatus and its corresponding method operate by controlling the air/fuel ratio in engines with multiple banks of cylinders that have separate intake and exhaust manifolds. The system utilizes oxygen sensors in the manifolds, which are periodically sampled to gauge the oxygen levels and, consequently, the levels of various pollutants in the exhaust gases. The apparatus, preferably in microprocessor form, computes a fuel control correction based on the difference between the sensed oxygen level and a desired oxygen level in each exhaust manifold. This correction is applied by altering the pulse width of a binary control signal directed to a solenoid valve. The solenoid valve is connected to a fuel pressure regulator, which vents an air chamber in the regulator when actuated. By changing the pulse width of the control signal, the average fuel pressure is varied, thereby controlling the air/fuel ratio and correcting the oxygen level in the exhaust manifold. Additionally, the controller monitors various temperatures within the engine and selectively disables control of the air/fuel ratio when certain temperatures fall outside assigned limits.

Career Highlights

Lessard is associated with Precision Engine Controls Corporation, where he applies his expertise in engine control technologies. His innovative approach has contributed to advancements in engine performance and emissions control.

Collaborations

One of his notable coworkers is Stephen H Nussbaum, with whom he has likely collaborated on various projects within the company.

Conclusion

Bradford A Lessard's contributions to the field of internal combustion engines through his innovative patent demonstrate his commitment to improving engine efficiency and reducing emissions. His work continues to influence advancements in engine control technologies.