Title:
CURRENT-ENERGIZER FOR CERAMIC HEATER
Document Type and Number:
Japanese Patent JPS62182417
Kind Code:
A
Abstract:
PURPOSE:To check an initial current as well as to protect circuit parts, by connecting two heaters in series at the initial stage of current-energization to plural pieces of ceramic heaters and, after they are energized with current, energizing one side of these heater alone with the continuous rating current. CONSTITUTION:Both poles of ceramics heaters H1-Hn to be used as a heating device for an exhaust gas emission control device are connected to switching circuits 11 and 12. Among them the switching circuit 11 is constituted by selector switches S21-S2n corresponding to these heaters H1-Hn. And, the switching circuit 12 consists of selector switches S31-S3n. And, both these switching circuits 11 and 12 are controlled by a timer circuit or the like. At the time of current-energization, first switches S2n, S3n and S21, S31 are selected and these heaters H1 and Hn are connected in series and energized with current and, after the elapse of the specified time, these selector switches are selected so as to energize the heater H1 alone. With this constitution, an initial current is held down, thus circuit parts are protectable in this way.
Inventors:
NIWA JUN
KAGEYAMA TERUTAKA
OIBE KAZUO
HOSHIZAKI HIRONORI
SUZUKI HIROBUMI
IMAMURA YOSHIHIKO
OBATA KIYOSHI
TAKAMA KENICHIRO
TAKESHIMA SHINICHI
KAGEYAMA TERUTAKA
OIBE KAZUO
HOSHIZAKI HIRONORI
SUZUKI HIROBUMI
IMAMURA YOSHIHIKO
OBATA KIYOSHI
TAKAMA KENICHIRO
TAKESHIMA SHINICHI
Application Number:
JP2181786A
Publication Date:
August 10, 1987
Filing Date:
February 03, 1986
Export Citation:
Assignee:
NIPPON DENSO CO
TOYOTA MOTOR CORP
TOYOTA MOTOR CORP
International Classes:
F01N3/02; (IPC1-7): F01N3/02
Attorney, Agent or Firm:
Takehiko Suzue