Electrical feed pump for pump assembly of high pressure fuel injection system for motor car, has stator which is attached forcedly with elastic element and/or is positively secured with holding pin at housing portion of pump unit

摘要

#CMT# #/CMT# The electrical feed pump (3) has an electric motor (4) which includes a stator (13) and a pump unit (5). The pump unit comprises internal gears (22), external gears (24) and a housing portion (10) of housing (8) fastened at a housing of high pressure pump. The stator is attached forcedly with an elastic element (50) at the housing portion and/or is positively secured with a holding pin (48) at the housing portion. The external gears are provided with permanent magnets so as to form a rotor of the electric motor. #CMT# : #/CMT# An independent claim is included for method for manufacturing pump assembly. #CMT#USE : #/CMT# Electrical feed pump for pump assembly (claimed) of high pressure injection system for injecting fuel to combustion engine of motor car. #CMT#ADVANTAGE : #/CMT# The suction channel and pressure channel of the feed pump are integrated into the high pressure pump, such that fuel line used as suction and/or pressure channel is not required. Hence the number of components of the pump assembly can be reduced and compact pump assembly can be obtained. The electric motor of the electrical feed pump supplies three-phase alternating current through power electronics, such that mechanical commutation elements are not required and vibrations and environmental influences due to the mechanical commutation elements are avoided while arranging the feed pump at the high pressure pump. The capacity of the electrical feed pump can be controlled effectively. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a cross-sectional view of the electrical feed pump. 3 : Electrical feed pump 4 : Electric motor 5 : Pump unit 8 : Housing 10 : Housing portion 13 : Stator 22 : Internal gear 24 : External gear 48 : Holding pin 50 : Elastic element.