OFF-ON-START switching system for diesel engines, and particularly automotive-type diesel engines

US4106465A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Walter Bernhardt · Fellbach, DE
• Bodo Ziegler · Stuttgart, DE

Key dates

• Filing date: May 16, 1977
• Grant date: Aug 15, 1978
• Expiry date: May 16, 1997

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B3/06
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

To simplify the circuitry and improve reliability of pre-heat, glow-plug or the like operation while using a conventional automotive OFF-ON-START switch, a momentary-operation pre-heat switch is included in the circuit, as well as a heat-sensitive relay and a timing circuit, the heat-sensitive relay determining if pre-heating has been sufficient, and the timing relay then providing a limited time period to permit starting of the engine while still maintaining pre-heat conditions but discontinuing pre-heat conditions if starting is not commanded.