|
(11) | EP 1 223 334 A3 |
(12) | EUROPEAN PATENT APPLICATION |
|
|
|
|
|||||||||||||||||||||||
(54) | Fuel pump |
(57) A fuel pump for use in an engine comprises a pump housing (10) and a plunger member
(30) which is reciprocable within a plunger bore (32) provided in the pump housing
(10) under the influence of a cam drive arrangement (20, 36, 38) so as to cause pressurisation
of fuel within a pumping chamber (34). The cam drive arrangement includes a reciprocable
shoe (36) and a roller member (38) and is driven, in use, by means of an associated
drive shaft (18). The roller member (38) is located radially inward of the shoe (36)
and is cooperable with a cam surface (20a) of the cam drive arrangement so as to impart
reciprocable movement to the shoe (36) upon rotation of the drive shaft (18). The
pump also includes a tubular member (26) which is secured to the pump housing (10)
and arranged such that it is substantially coaxial with the drive shaft (18), the
tubular member (26) being further arranged such that it guides reciprocal movement
of the shoe (36), in use. |