Bypass valve for expansion machine

US10704697B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Schwaderer · Wildberg, DE
• Benjamin Schweizer · Horb, DE
• Frank Scholz · San Diego, US

Key dates

• Filing date: Aug 22, 2017
• Grant date: Jul 7, 2020
• Expiry date: Aug 22, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K15/044
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a bypass valve (1), in particular for an expansion machine (104) of a waste heat recovery system (100). The bypass valve (1) has a housing (2) with a valve chamber (9) formed therein. An inlet (3), an expander outlet (4) and a bypass outlet (5) are formed in the housing (2), which feed into the valve chamber (9). A closing element (6) is moveably arranged in the valve chamber (9). A valve seat (11) is formed on the housing (2). The closing element (6) cooperates with the valve seat (11) in order to open and close a first hydraulic connection from the inlet (3) to the expander outlet (4). A control valve (8) opens and closes a second hydraulic connection from the inlet (3) to the bypass outlet (5). The control valve (8) forms a first throttle point (21) in an open position. A second throttle point (22) is arranged between the valve chamber (9) and the bypass outlet (5). The control valve (8), the second throttle point (22) and the closing element (6) border a control chamber (9a). The first throttle point (21) has a greater flow cross-section than the second throttle point (22).