Title:
IGNITER OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP3216972
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent re-energization during the presence of a self-diagnosis and an ignition on-control signal by forming a bipolar transistor for controlling the current-energization interception of a primary current, a current limiter circuit and a thermal shutoff circuit forcibly shutting off the primary current in time of something wrong happening, into on a chip.
SOLUTION: An ignition circuit 11 is provided with a bipolar transistor (IGBT) 2 energizing or intercepting a primary current flowing into a primary coil of an ignition coil 1. A current limiter circuit 4 controls the extent of gate voltage by a current detector 3, limiting the primary current to the setting value, while a thermal shutoff circuit 5 makes the primary current be forcibly shut off or reset according to a condition. This ignition circuit 11 is made to serve as an integrated circuit which converges the bipolar transistor (IGBT) 2, the current limiter circuit 4 and the thermal shutoff circuit 5 on one chip intensively. A chip's detection temperature is reached to the initial setting value, a latch circuit 6 is set up, and thereby an ignition control signal is maintained up to a time when it is turned to OFF from ON.
Inventors:
Takashi Ito
Katsuaki Fukatsu
Ryoichi Kobayashi
Noboru Sugiura
Katsuaki Fukatsu
Ryoichi Kobayashi
Noboru Sugiura
Application Number:
JP19944995A
Publication Date:
October 09, 2001
Filing Date:
August 04, 1995
Export Citation:
Assignee:
株式会社日立製作所
株式会社日立カーエンジニアリング
株式会社日立カーエンジニアリング
International Classes:
F02P3/05; F02P3/055; H01F38/12; (IPC1-7): F02P3/055; H01F38/12
Domestic Patent References:
| JP2223672A | ||||
| JP63239367A | ||||
| JP5462426A | ||||
| JP5060645A | ||||
| JP6229473U |
Attorney, Agent or Firm:
Yasuo Sakuta