Other

Nenggen Ding

Weiwen Deng

A servo brake cylinder for a distributed brake system with an electric motor, a ball screw assembly with a lead screw and a nut, a piston, a cylinder body is disclosed. The electric motor is connected to the ball screw assembly. The piston is installed in the hollow inner space of the cylinder body, slidable axially. The piston has a hole at the center formed by three sections of surfaces including a first cone surface, a cylindrical surface a second cone surface. One end of the lead screw is connected with the nut, and the other end at the tip of the lead screw has three sections of surfaces including a gradually constricting cone surface from the tip followed by a cylindrical surface, further followed by a gradually expanding cone surface. These surface sections at the lead screw and the three sections of the surfaces at the hole of the piston form an inlet valve and an outlet valve between the piston and the lead screw.

Servo brake cylinder for distributed compound brake system and such brake system and method of operating the same

A brake control system of a vehicle, including a first electric motor, a second electric motor, a first piston cylinder and a second piston cylinder. Each piston cylinder includes a hydraulic chamber and a piston, where the position of the piston defines the volume of the hydraulic chamber. The system includes a plurality of wheel cylinders and a hydraulic control unit which includes two sets of electromagnetic valves. Each of electric motors are mechanically connected to the piston of respective piston cylinder via a motion converter that converts rotational motion of the electric motor to linear motion of the piston, thus changing the pressure of the hydraulic chamber. The hydraulic chambers are hydraulically connected with the respective set of the electromagnetic valves, further connecting to corresponding wheel cylinders.

Brake-by-wire system based on dual-motor configuration and operation methods thereof

An electro-hydraulic brake (EHB) system of a vehicle, the vehicle is equipped with brake pedal, brake pushrod, wheel cylinders, brake pedal sensors, on-board vehicle sensors. The EHB system includes a manual boost cylinder, an electric power assist assembly and a master cylinder. The manual boost cylinder includes a sliding cylinder body, a large piston and a small piston. The manual boost cylinder also include interlocking means that selectively operate on locking or unlocking between the sliding cylinder body, the small piston and the large piston based on a plurality of positions of the small piston within the manual boost cylinder body. The electric power assembly includes an electric motor, a pinion gear and a rack and a master cylinder. The master cylinder includes a first piston, a second piston and limiter means.

Growing community of inventors

Beijing, China

Nenggen Ding