Hydraulic brake system including slip control
AssigneeAlfred Teves GmbH
InventorJochen Burgdorf
Life of this patent
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Abstract
A hydraulic brake system is described including a brake slip and/or traction slip control, wherein a pump required herefor is connected in series into the brake conduit through which, in a normal deceleration process, pressure fluid is displaced from the master brake cylinder to the wheel brake. The pump is mounted so that the intake side thereof is in communication with the master brake cylinder and the pressure side thereof is in communication with the wheel brake. Upon commencement of a slip control, the pump drive is turned on. As the master cylinder pressure prevails on the intake side of the pump the pump can very quickly reach the full discharge capacity, thereby enhancing control response of the slip. Moreover, the risk of air being sucked into the brake system is reduced.
Claims16
A hydraulic slip controlling brake system for controlling slip of an automotive vehicle wheel, comprising:
- a brake pedal;
- a brake pedal-actuated master cylinder associated with said vehicle wheel;
- at least one wheel brake cylinder;
- fluid circuit means placing said wheel brake cylinder in fluid communication with said master cylinder including a brake conduit means and pressure fluid therein whereby upon actuation of said brake pedal, pressure fluid is displaced from said master cylinder, along said brake conduit, and into said wheel brake cylinder to pressurize said wheel brake cylinder;
- antislip control means activated upon detection of a wheel slip condition to control pressurization of said wheel brake cylinder to control slip of said vehicle wheel, said antislip control means including a hydraulic pump connected in series in said fluid circuit means with said brake conduit means, said pump having a pump chamber and including an intake side communicating said pump chamber with said master cylinder and a pressure side communicating said pump chamber with said wheel brake cylinder, a flow path from said master cylinder to said wheel brake cylinder passing through said pump chamber during normal pressurization of said wheel brake cylinder by said brake pedal actuation without activation of said antislip control means so that said fluid circuit means causes displacement of pressure fluid through said pump chamber during brake pedal actuation which pressure fluid displacement corresponds to substantially the entire fluid pressure displacement from said master cylinder caused by actuation of said brake pedal in pressurizing of said wheel brake cylinder during normal brake operation without activation of said antislip control means.
Dependencies are inferred from the claim text.