Fuel tank mounted, motorized high pressure gasoline pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 19, 2004
Grant Date -
Nov 6, 2003
app pub date -
Jan 3, 2003
filing date -
Aug 14, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pump, for supplying high pressure fuel from a fuel tank to an engine via a common rail, includes a motor assembly (20) mounted on top of the fuel tank, a pump assembly (26) positioned within the fuel tank, and a support column (32) rotatably connecting the motor assembly to the pump assembly. A high pressure pump sub-assembly (46) includes a pump body (48) having a drive bore (50) and multiple plunger bores (60) formed therein. The external profile of a drive member (58) which is rotatable within the drive bore engages the radially inner end of pumping plungers (62) disposed in each of the plunger bores for a portion of each revolution to reciprocally move the plungers between radially inner and outer limit positions. Reciprocation towards the inner limit position induces a low pressure in the radially outer end of the plunger bore, thereby drawing fuel via the drive bore without the aid of a low pressure pump.
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