Title:
OVERLAPPING DISCHARGE-TYPE IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2013/077011
Kind Code:
A1
Abstract:
Provided is a discharge-type ignition device for an internal combustion engine with which a low cost and a reduced size can be achieved, and which can be installed in a narrow mounting space, and with which it is possible to maintain the supply of overlapping current necessary for a stable discharge. An ignition device for an internal combustion engine, with which a discharge breakdown is produced in the discharge gap (g) of an ignition plug (2) and a discharge current flows by means of an ignition coil (1) that is operated on the basis of an ignition signal, is equipped with an overlapping discharge function. The configuration is such that an overlap time control circuit (6) causes a DC-AC booster circuit (3) to operate, and alternating current for generating an overlapping voltage is supplied to a multistage voltage-doubling rectifier circuit (4), and the obtained direct-current high voltage is overlapped with the same polarity with the induction voltage of a secondary coil (1b). The charge voltage to a discharge electrode is detected by an overlapping current detection/comparison circuit (8), and compared with an overlapping current set value. If the detected value for the overlapping current is lower than the set value, the value for the wave height of the alternating current from the DC-AC booster circuit (3) for generating the overlapping voltage is raised, and if the detected value is higher than the set value, the value for the wave height of the alternating current from the DC-AC booster circuit (3) for generating the charge voltage is lowered, thereby bringing the detected value for the overlapping current close to the set value.
Inventors:
SHIMADA NAOKI (JP)
Application Number:
PCT/JP2012/062880
Publication Date:
May 30, 2013
Filing Date:
May 14, 2012
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS HANSHIN LTD
SHIMADA NAOKI (JP)
SHIMADA NAOKI (JP)
International Classes:
F02P3/04; F02P15/00
Foreign References:
| JPH07229461A | 1995-08-29 | |||
| JPS56110566A | 1981-09-01 | |||
| JP2006063973A | 2006-03-09 | |||
| JPS5397564A | 1978-08-25 | |||
| JPH05164028A | 1993-06-29 | |||
| JPH07174063A | 1995-07-11 |
Attorney, Agent or Firm:
FUKUDA, Kenzo et al. (JP)
Kenzo Fukuda (JP)
Kenzo Fukuda (JP)
Download PDF:
Claims:
Previous Patent: SEALING DEVICE
Next Patent: COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMMUNICATION SYSTEM
Next Patent: COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMMUNICATION SYSTEM