Hydraulic apparatus for the automatic correction of the inclination of the headlights of a motor vehicle

US4180848A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Inge Schwerin · Asperg, DE
• Ulrich Zillgitt · Stuttgart, DE
• Steffen Schneider · Tamm, DE
• Hellmut Kegel · Gerlingen, DE
• Hans-Rudolf Bodensieck · Gerlingen, DE
• Helmut Zauft · Gerlingen, DE
• Reinhold Poglitsch · Reutlingen, DE
• Kurt Grabow · Feucht, DE

Key dates

• Filing date: Oct 17, 1977
• Grant date: Dec 25, 1979
• Expiry date: Oct 17, 1997

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60Q1/105
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

What follows is the description of an improved hydraulic apparatus for the automatic adjustment of the inclination of the headlights of a motor vehicle, the adjustment being a dependent function of the axle load. The apparatus has a level sensor at each axle and each level sensor contains one metering piston and two positioning pistons. The rear axle level sensor is connected via two separate hydraulic lines to the front axle sensor, and the front axle sensor is in turn connected via two separate hydraulic lines to the positioning elements of the headlight housings. The internal construction of the two level sensors is substantially identical and is chosen such that the system is also suitable for manual adjustment.