Glow plug control device for diesel engine

Abstract

Abstract PURPOSE:To always ensure a given glow plug temperature and to improve ignitability, by a method wherein a glow temperature is controlled in a stepped manner so that, in a low load region, the temperature of a glow plug is increased to a given high value and in a high load region, the temperature of the glow plug is decreased to a given low value. CONSTITUTION:First - fourth glow plugs 11 (11a-11d) mounted to cylinders A-D, respectively, are energized through common lead wire 16 and branch lead wires 17a-17d, and a heat generating amount thereof is controlled through a power transistor Tr23. The transistor Tr23 is controlled by a control box 22 according to a detecting result of a current flowing through a fixed resistor 30 located in the fourth branch lead wire 17d and a glow plug set temperature computed according to an engine load in a main controller 29. Namely, the transistor Tr23 is controlled in a way that a glow plug temperature is controlled in a stepped manner so that, in a low load region, the temperature of a glow plug 11 is increased to a given value and in a high load region, it is reduced to a given value.

Inventors

• 👤 Fumihiko Saito
• 👤 史彦 斉藤

Bibliographic Details