Michel Jallas

Title: Michel Jallas: Innovator in Hydraulic Control Systems

Introduction

Michel Jallas is a notable inventor based in Garches, France. He has made significant contributions to the field of hydraulic control systems, holding 2 patents that showcase his innovative approach to engineering.

Latest Patents

One of his latest inventions is a servo-control valve. This electromagnetically controlled hydraulic servo-control valve features a hydraulic slide activated by an electromagnet with a plunger. The distributed pressure hydraulically pushes the slide and the plunger toward each other. Constrictions in the hydraulic conduits are designed to attenuate oscillations. The plunger and the slide have slightly different cross-sections, which provide a control loop for the distributed pressure, affecting the position of the slide. The use of a polarized electromagnetic supplied by a current that ranges from a negative value to a positive value doubles the regulating capacity. To prevent hysteresis of the pressure curves as a function of the current, the electromagnet can be supplied by a pulsed current or an alternating current with a continuous component. This servo-control valve may be utilized in connection with an automatic gearbox control.

Another significant invention by Jallas is a transmission with a variator, particularly for automotive vehicles. This transmission consists of a variator that can be disconnected by engaging a constant-ratio direct drive. The engagement system is designed as an either-or device, enhancing the versatility of the transmission system.

Career Highlights

Michel Jallas is associated with Renault, a prominent automotive manufacturer. His work at Renault has allowed him to apply his innovative ideas in practical applications, contributing to advancements in automotive technology.

Collaborations

Throughout his career, Jallas has collaborated with notable colleagues, including Jean M Bouvet and Claude Berthou. These collaborations have likely enriched his work and led to further innovations in the field.

Conclusion

Michel Jallas stands out as an influential inventor in hydraulic control systems, with his patents reflecting a commitment to innovation and engineering excellence. His contributions continue to impact the automotive industry and beyond.