Title:
HEATER DRIVING DEVICE
Document Type and Number:
Japanese Patent JP2018048614
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a heater driving device controlling energization to a heater while detecting a temperature of the heater to heat a fuel in just proportion and to improve startability of an engine.SOLUTION: A heater driving device 1 controls energization to a heater 3 of a fuel heating portion 2. The energization to the heater 3 is performed by giving a gate signal to MOSFET 4 by a control circuit 5. A temperature of the heater 3 is calculated by detecting voltage between the drain and source of the MOSFET 4 by a detection circuit 6 to estimate a fuel temperature Tf. The control circuit 5 energizes the heater 3 when an ON-signal S1 of IGSW is input to estimate the fuel temperature Tf, continues heating to an upper limit set level T2 when the fuel temperature does not reach a reference set level T1, and cuts off the energization to the heater 3 when it reaches the reference set level. When the estimated fuel temperature Tf is within a range from the set level T1 to T2, it is an engine startable region.SELECTED DRAWING: Figure 1
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Inventors:
ITO MASAHIRO
Application Number:
JP2016185504A
Publication Date:
March 29, 2018
Filing Date:
September 23, 2016
Export Citation:
Assignee:
DENSO CORP
International Classes:
F02M31/125; F02D41/06; F02D45/00; F02M53/00; F02M53/02; H05B3/00
Domestic Patent References:
| JP2015135069A | 2015-07-27 | |||
| JP2010038024A | 2010-02-18 | |||
| JP2013122724A | 2013-06-20 | |||
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| JPS6172868A | 1986-04-14 |
Foreign References:
| US20140182562A1 | 2014-07-03 | |||
| US20160153401A1 | 2016-06-02 | |||
| US20110162619A1 | 2011-07-07 | |||
| KR20120096283A | 2012-08-30 | |||
| WO2014016920A1 | 2014-01-30 |
Attorney, Agent or Firm:
Patent Business Corporation Sato International Patent Office