Valve control arrangement

US4765288A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ernst Linder · Mühlacker, DE
• Helmut Rembold · Stuttgart, DE

Key dates

• Filing date: Jun 16, 1986
• Grant date: Aug 23, 1988
• Expiry date: Jun 16, 2006

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2001/34446
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A valve control arrangement for controlling closing and opening time of a valve actuatable by a valve control cam of a cam shaft via an axially displaceable valve plunger, in a displacement piston-internal combustion engine, the valve control arrangement comprises a stroke transmitting chamber between the valve control cam and the valve plunger and arranged to be filled with a working medium, a controllable opening for supplying the pressure medium into the stroke transmitting chamber and withdrawing the pressure medium from the latter so as to change an axial dimension of the stroke transmitting chamber between the valve control cam and the valve plunger, device for controlling the opening so that a stroke of the valve control cam which acts with the beginning of a valve opening adjusts the opening to an unloading cross-section so that to a closing point of time of the valve, a partial quantity of the pressure medium can flow out of the stroke transmitting chamber.