Engine braking control system

US4662332A · kind A · utility

Assignee

• Daimler-Benz AG · DE

Inventors

• Horst Bergmann · Walldürn, DE
• Gunter Fischer · Hamburg, DE

Key dates

• Filing date: Aug 5, 1985
• Grant date: May 5, 1987
• Expiry date: Aug 5, 2005

Classification

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

Abstract

In a four-stroke internal combustion engine for driving a motor vehicle, a throttle flap holding back the exhaust gases during vehicle braking is arranged in the outlet channel. Each of the outlet valves controlled by a cam shaft via rockers has assigned to it a limiting device by means of which the stroke of the outlet valves is limited during braking to an amount which prevents the outlet valves from closing. To increase the engine braking power in an internal combustion engine of this type, the stroke of the outlet valves is limited to an amount at which the opened outlet valves achieve a braking effect, and there is a directional valve which is adjustable as a function of the brake-pedal travel and by means of which the throttle flap and the limiting devices can be actuated.