| 摘要 |
A distribution rotor-type fuel injection pump has a body, shaft of rotor drive, clutch of rotor drive, distribution bushing of rotor with high pressure fittings, rotor-distributor with central symmetry of arrangement of plungers in it, washer of plunger drive with inner cam profile, hydro-mechanical device for change of angle of feeding start, low pressure pump, controller and hydro-mechanical indicator of rate mode. The plungers are placed in rotor-distributor with central symmetry, minimum in two planes that are normal to axis of rotation of rotor, each plunger has at working surface circular groove that is connected to decreasing space with radial and axial channels of the plunger. Each plunger has collar that at entering with set gap to collar recess provided in each guide of the plunger forms cavity of hydraulic buffer, and each guide of the plunger has circular groove connected to low pressure cavity with channels of rotor. In the body at least two washers for plunger drive are placed, with inner cam profile, one of those controls the plungers of beginning of feeding, and the other one – the plungers of end of feeding. Turn of washer of plunger drive is provided by means of hydraulic amplifier power piston of which is connected to its washer of plunger drive by means of pin, and slide bushing for control of hydraulic amplifier is unloaded with removal of forces for motion of power piston. Power piston of hydraulic amplifier has back valve, slide bushing for control of hydraulic amplifier of beginning of feeding one end of which is connected to low pressure cavity and is loaded to supercharge pressure, and the other end is connected to cavity of atmospheric pressure and is loaded with compression spring. In supercharge line low-inertia high pressure reduction valve is installed, lever mechanism is equipped with proportional lever that changes ratio of arms at change of rate more, radial distribution channel for fuel supply to high pressure fittings is provided in the rotor as through and inclined with respect to plane normal to axis of rotation of the rotor. |
