Switch valve for controlling a hydraulic fluid flow for a connecting rod of variable compression internal combustion engine and connecting rod

US10598088B2 · kind B2 · utility

Assignee

• ECO Holding 1 GmbH · DE

Inventors

• Alexander Mudra · Marktheidenfeld, DE
• Wolfgang Rupp · Wertheim, DE

Key dates

• Filing date: Jun 25, 2018
• Grant date: Mar 24, 2020
• Expiry date: Oct 3, 2038

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K31/363
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A switch valve for controlling a hydraulic fluid flow of a connecting rod for an internal combustion engine with variable compression with an eccentrical element adjustment arrangement for adjusting an effective connecting rod length, the eccentrical element adjustment arrangement including a first cylinder including a first hydraulic chamber; a second cylinder including a second hydraulic chamber, wherein the first cylinder includes a first inlet for feeding hydraulic fluid into the first cylinder from a supply and the second cylinder includes a second inlet for feeding hydraulic fluid into the second cylinder from the supply, wherein the first cylinder includes a first drain for draining the hydraulic fluid from the first cylinder and the second cylinder includes a second drain for draining the hydraulic fluid from the second cylinder, wherein the switch valve includes a step piston which is displaceable into a first switching position or a second switching position.