Device for switching a combustion engine from one mode of operation to another mode of operation

US5404851A · kind A · utility

Assignee

• MAN Nutzfahrzeuge AG · DE

Inventors

• Alfred Neitz · Wendelstein, DE
• Jürgen Ritter · Nuremberg, DE
• Otto Schnitzer · Nürnberg, DE

Key dates

• Filing date: Aug 19, 1993
• Grant date: Apr 11, 1995
• Expiry date: Aug 19, 2013

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B2075/027
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device for switching a combustion engine from a propelling mode to a braking mode, wherein the combustion engine has at least one intake valve and at least one exhaust valve per cylinder, includes a cam shaft for actuating the intake and exhaust valves of each cylinder and a hydraulic linkage made of transmitting pistons and receiving pistons for connecting the cam shaft to the intake and exhaust valves of each cylinder. The cam shaft has a first intake cam for actuating a first transmitting piston and a second intake cam for actuating a second transmitting piston, the first and the second transmitting pistons controlling the intake valve, and a first exhaust cam for actuating a third transmitting piston and a second exhaust cam for actuating a fourth transmitting piston, the third and fourth transmitting pistons controlling the exhaust valves. A control system has a non-rotatable control slide connected between the transmitting and receiving pistons. The control slide has transverse bores for connecting and disconnecting the transmitting and receiving pistons. The device further includes a hydraulic system for switching the control slide from a first operating position for the p…