Title:
CONTROL DEVICE FOR FUEL INJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/088287
Kind Code:
A1
Abstract:
Provided is a control device for a fuel injection device, said control device being capable of stabilizing the behavior of a valve body even if the voltage of a voltage source fluctuates, and also capable of reducing injection amount variations. For this purpose, a fuel injection device 101 includes a valve body 214, and a coil 205 that generates a magnetic attractive force for attracting a movable element 202 that drives the valve body 214. A control device 150 applies a predetermined voltage to the coil 205 on the basis of an injection pulse, and applies a drive current to the coil 205 until the maximum current is reached so as to attract the movable element 202, thereby driving the valve body 214 and injecting fuel. Before the valve body 214 reaches a desired maximum lift position, the drive current applied to the coil 205 is lowered from the maximum current, and a voltage of 0 V or a certain value lower than a predetermined voltage is continuously applied to the coil 205 until the valve body 214 reaches the desired maximum lift position.
Inventors:
KUSAKABE RYO (JP)
SARUWATARI MASAYUKI (JP)
MAEKAWA NORIYUKI (JP)
SARUWATARI MASAYUKI (JP)
MAEKAWA NORIYUKI (JP)
Application Number:
PCT/JP2017/039481
Publication Date:
May 17, 2018
Filing Date:
November 01, 2017
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02D41/20; F02D41/36; F02D45/00; F02M51/00; F02M61/10
Domestic Patent References:
| WO2016136392A1 | 2016-09-01 | |||
| WO2016136394A1 | 2016-09-01 |
Foreign References:
| JP2014163278A | 2014-09-08 | |||
| JP2012052419A | 2012-03-15 | |||
| JP2015206371A | 2015-11-19 | |||
| JP2014098375A | 2014-05-29 | |||
| JP2015224621A | 2015-12-14 |
Attorney, Agent or Firm:
TODA Yuji (JP)
Download PDF:
Previous Patent: COMPONENT CONCENTRATION DETECTOR
Next Patent: ULTRASONIC MEASURING DEVICE AND METHOD
Next Patent: ULTRASONIC MEASURING DEVICE AND METHOD