Title:
【発明の名称】低圧ポンプによって発生されて高圧ポンプに印加される予備圧力を変える方法及び装置
Document Type and Number:
Japanese Patent JP2003513193
Kind Code:
A
Abstract:
Method for varying a prepressure (p_des) generated by a low-pressure pump and applied to a high-pressure pump with the low-pressure pump (2) and the high-pressure pump (3) pumping fuel for the internal combustion engine (1). In order to keep the prepressure (p_des), on the one hand, as low as possible to take load off the low-pressure pump (2) and to, on the other hand, adjust the prepressure (p_des) so high that a vaporization of the fuel is reliably avoided, the invention suggests that: the actual temperature (T_Krst) of the fuel in the high-pressure pump (3) is determined; a prepressure (p_des) as low as possible is determined in dependence upon the fuel temperature (T_Krst) for which a vaporization of the fuel in the high-pressure pump (3) is reliably avoided; and, the low-pressure pump (2) is so driven or controlled that it generates the determined prepressure (p_des). The method is preferably carried out on the basis of physical models of the high-pressure pump (3).
Inventors:
Claus YOOS
Jens Wolver
Thomas Frenz
Hansjerk Bochum
Marx Amler
Jens Wolver
Thomas Frenz
Hansjerk Bochum
Marx Amler
Application Number:
JP2001533303A
Publication Date:
April 08, 2003
Filing Date:
October 11, 2000
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
F02D45/00; F02D41/14; F02D41/30; F02D41/38; (IPC1-7): F02D41/38; F02D45/00
Attorney, Agent or Firm:
Toshio Yano (4 outside)