Method and apparatus to control an ignition system

US10844825B2 · kind B2 · utility

Assignee

• DELPHI AUTOMOTIVE SYSTEMS LUXEMBOURG SA · LU

Inventors

• Frank Lorenz · Trier, DE
• Marco Loenarz · Esch-sur-Alzette, LU

Key dates

• Filing date: Apr 10, 2017
• Grant date: Nov 24, 2020
• Expiry date: Apr 15, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P15/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An ignition system includes a controller which controls two stages—to provide current to a spark plug. The stages include a first transformer including a first primary winding and a first secondary winding and a second transformer including a second primary winding and a second secondary winding. A switch is electrically connected between a supply high side and the high side of the first primary winding. A second switch is electrically connected between the first primary winding and the power supply low side supply. A third switch is connected between the junction of the switch and high side end of the first inductor and a point between the low side of the second primary winding and low side supply. A fourth switch is located between the low side of the second primary winding and the point. A fifth switch is located between the point and low side supply.