MULTICOMPONENT DOSING PUMP Russian patent published in 1999 - IPC

FIELD: fuel supply and lubricating systems for internal combustion engines. SUBSTANCE: pump has cylindrical displacer with two steps of different diameters installed in axial drilling of housing for translational movement in conjunction with driving member to form two pump chambers separated by sealed joint, provided with intake and delivery valves, and connected to two intake and delivery lines. First chamber is formed by axial drilling walls and annular end part of larger-diameter step while second chamber is formed by end part of smaller-diameter step. Pump lines are oil and fuel pipings. One pump chamber communicates with oil piping and other one, with fuel piping. Fuel chamber design is optimized and ratio between butt-end areas of displacers of first and second chambers is maintained within 1 : (20- 50). Displacer driving member is also optimized. Maximum amplitude of displacer travel is found from equation , where H_cam is cap profile height; l_cam is distance from cam axis to contact line between slider and rocker arm; l_dis is distance from displacer axis to contact line between slider and rocker arm. EFFECT: improved dosing accuracy. 5 cl, 2 dwg