Title:
The amount variation correcting method of discharge and a common rail type fuel injection control device of a high-pressure pump
Document Type and Number:
Japanese Patent JP5936263
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve reliability and stability of rail pressure control in a common rail type fuel injection control device used for a construction machine such as a tractor.SOLUTION: When a pressure sensor 11 is determined to be out of order by an electronic control unit 4, a pre-control amount corresponding to an instructed injection amount and a target engine speed is obtained by a pre-control amount map 2-11 (S106), and a pump discharge amount for open loop control corresponding to the instructed injection amount and the target engine speed is obtained by a pump discharge amount map 2-14 for the open loop control (S106). In addition, the sum of the pre-control amount and the pump discharge amount for the open loop control is corrected by a variation correcting amount obtained by a variation correcting map 2-15 (S108), and a metering valve 6 is open-loop controlled as the target pomp discharge amount of a high pressure pump 7 (S110, S112).
Inventors:
Tomokazu Ohashi
Application Number:
JP2012100751A
Publication Date:
June 22, 2016
Filing Date:
April 26, 2012
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
F02D41/22; F02D45/00; F02M37/00
Domestic Patent References:
| JP2011064127A | ||||
| JP2007138774A | ||||
| JP2005155561A |