PILOT JET CONTROL METHOD AND DEVICE THEREFOR

Title:

PILOT JET CONTROL METHOD AND DEVICE THEREFOR

Document Type and Number:

WIPO Patent Application WO/2008/059730

Kind Code:

A1

Abstract:

Operation feeling and travel feeling are enhanced by avoiding a change in the number of steps of pilot jet during transient response of an engine. When pilot jet is started, a decision is made whether the most recent quantity of fuel injection Q exceeds an upper limit Qmax or not (S100). The number of pilot jet steps is fixed to a predetermined value if the upper limit Qmax is judged to be exceeded, otherwise a decision is made whether the quantity of fuel injection Q is lower than a lower limit Qmin or not (S104). If the quantity of fuel injection Q is judged to be lower than the lower limit Qmin, control for fixing the number of pilot jet steps is released and map control is started to determine the number of pilot jet steps based on a map (S106).

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Inventors:

MORI OSAMU (JP)
HOSHINO KAZUHIKO (JP)

Application Number:

PCT/JP2007/071529

Publication Date:

May 22, 2008

Filing Date:

November 06, 2007

Export Citation:

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Assignee:

BOSCH CORP (JP)
MORI OSAMU (JP)
HOSHINO KAZUHIKO (JP)

International Classes:

F02D41/38; F02D41/10; F02D45/00; F02M45/02

Foreign References:

JP2005002904A	2005-01-06
JP2003106192A	2003-04-09
JP2002269229A	2002-09-20

Other References: