Fuel injection pump for internal combustion engines

Details Fuel injection pump for internal combustion engines Fuel injection pump for internal combustion engines

1993-05-14

1994-03-08

Cross, E. Rollins

Internal-combustion engines

Engine speed regulator

Having condition responsive means with engine being part of...

12317917, 123198DB, F02D 3100, F02N 1700, F02B 7700

Patent

active

052918670

ABSTRACT:
A fuel injection pump for internal combustion engines having in-line cylinder bushes, in each of which a pump piston defining a pump work chamber is guided, the piston being rotatable by a governor rod for the sake of fuel supply quantity regulation. Mounted on the pump housing is an adjusting device, in which an adjusting piston is guided axially parallel with the governor rod; the adjusting piston has a radial pin, which protrudes through a slit in the wall of the adjusting device and pump housing into an oblong slot of the governor rod, thus limiting the adjusting motion of the rod in certain operating ranges. The position of the adjusting piston determines the maximum governing travel of the governor rod in the full-load direction upon engine starting. The adjusting piston is variable via an adjustable stop acting upon one face end thereof and is also variable as a function of temperature via a temperature-dependent spring element disposed on its circumference. In addition, with its face end, the adjusting piston defines a pressure chamber, by way of which the adjusting piston can be adjusted pneumatically in the direction of a zero supply quantity; via two stops of the oblong slot, the adjusting piston moves the control rod with it in the process and in this way interrupts the fuel delivery.

REFERENCES:
patent: 4112897 (1978-09-01), Hufendiek
patent: 4208998 (1980-06-01), Hoffman et al.
patent: 4372267 (1983-02-01), Adams
patent: 5080063 (1992-01-01), Augustin
patent: 5131358 (1992-07-01), Grieshaber

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