US 12,092,103 B2
Fuel pump with determinant translating cam arrangement
Martin Augustine Clements, Loveland, OH (US)
Assigned to EATON INTELLIGENT POWER LIMITED, Dublin (IE)
Filed by Eaton Intelligent Power Limited, Dublin (IE)
Filed on Sep. 26, 2022, as Appl. No. 17/952,669.
Claims priority of provisional application 63/248,184, filed on Sep. 24, 2021.
Prior Publication US 2023/0096852 A1, Mar. 30, 2023
Int. Cl. F04C 2/00 (2006.01); F04C 2/332 (2006.01); F04C 2/348 (2006.01); F04C 14/22 (2006.01); F04C 15/00 (2006.01); F04C 15/06 (2006.01)
CPC F04C 15/0065 (2013.01) [F04C 2/332 (2013.01); F04C 2/348 (2013.01); F04C 14/223 (2013.01); F04C 14/226 (2013.01); F04C 15/06 (2013.01); F04C 2240/811 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A fuel pump comprising:
a housing having a pump chamber, an inlet in fluid communication with the pump chamber, and an outlet in fluid communication with the pump chamber;
a spacer ring fixedly mounted to the housing;
a rotor disposed in the pump chamber;
a cam arrangement radially interposed between the rotor and the spacer ring, the cam arrangement engaging the spacer ring at an interface at which the cam arrangement rolls relative to the spacer ring between a zero displacement position and a full displacement position;
an involute gear set defining the interface between the cam arrangement and the spacer ring, the involute gear set including a first part formed by the cam arrangement and a second part formed by the spacer ring; and
an actuator configured to roll the cam arrangement relative to the spacer ring to selectively vary pump output while maintaining a center point of the cam arrangement along a linear translation axis;
wherein one of the first and second parts includes an involute tooth and the other of the first and second parts includes a notch sized to receive the involute tooth, and the involute tooth has peripheral sides each having an involute curve.