초록 ▼

A method for manufacturing a cylinder interior fuel injection valve and an apparatus for adjusting a fuel injection amount used therefor may sufficiently cope with a fluctuation in fuel pressure or combustion gas pressure that would occur in an actual engine. According to this manufacturing method,

A method for manufacturing a cylinder interior fuel injection valve and an apparatus for adjusting a fuel injection amount used therefor may sufficiently cope with a fluctuation in fuel pressure or combustion gas pressure that would occur in an actual engine. According to this manufacturing method, a position of an adjuster is adjusted (step 110), a fuel injection amount is measured (step 111), and it is judged whether or not the measured value of the fuel injection amount falls within a range of a rated value (step 112). Then, if the fuel injection amount is out of the range of the rated value, the process is returned back to the step 110, and if it falls within the range of the rated value, the process shifts to a subsequent step 113. Subsequently, a spring force of a valve closing spring is measured (step 113), and it is judged whether or not the measured value of the spring force falls within a control range (step 114). Then, if the spring force is out of the control range, the process is returned back to the step 110, and if it falls within the control range, the adjuster is fixed (step 115) and the process shifts to a next step.

대표청구항 ▼

[ What is claimed is:] [1.]1. A manufacturing method for a cylinder interior fuel injection valve composed of, a housing having a fuel passage along an axis, a valve assembly having a valve seat provided with a fuel injection port and a valve body for contacting with or separating from said valve se

[ What is claimed is:] [1.]1. A manufacturing method for a cylinder interior fuel injection valve composed of, a housing having a fuel passage along an axis, a valve assembly having a valve seat provided with a fuel injection port and a valve body for contacting with or separating from said valve seat to open/close said fuel injection port and fixed to one end of said housing so as to project a side of said fuel injection port, a solenoid assembly installed in said housing for magnetically sucking said valve body in a valve opening direction, a valve closing spring received in the fuel passage of said housing for biasing said valve body in a valve closing direction, and an adjuster fixed to the fuel passage of said housing for depressing said valve closing spring toward said valve seat thereby simultaneously to set both a fuel injection amount and a spring force of the valve closing spring;said manufacturing method comprising the steps of:adjusting the position of said adjuster in the fuel passage of said housing so that both a fuel injection amount falls within a range of a rated value of the fuel injection amount and a spring force of said valve closing spring falls within a set control range of the spring force; andfixing said adjuster which has been adjusted in position to said housing.