| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel pressure control device immediately restarting an internal combustion engine from an idle stop. <P>SOLUTION: When the idle stop is required (S400:Yes), common rail pressure is regulated to a target residual pressure (S402:No), and start pressure is not yet measured (S404:No), this fuel pressure control device regards the common rail pressure at this time as the start pressure Ps (S406), and increments a time counter (S410). When the idle stop is not required (S400:No), the start pressure is already measured (S412:Yes), and the time counter reaches a predetermined value or more (S414:Yes), the fuel pressure control device regards the common rail pressure at this time as termination pressure Pe, and calculates a rate of decrease in pressure from differential pressure ΔP between the termination pressure Pe and the star pressure Ps and the time counter (S418). The fuel pressure control device sets the next target residual pressure based on the calculated rate of decrease in pressure and a reference rate of decrease (S420, S422). <P>COPYRIGHT: (C)2011,JPO&INPIT |
