An electro-hydraulic control unit for a vehicle brake system includes a hydraulic control unit including an HCU block (32) defining a motor bore (40) containing an electric motor (42) and an eccentric chamber (50) containing a rotating eccentric (52) driven by the electric motor. The HCU block also defines a pump bore (66) containing a piston pump (68) including a piston rod (80) having a generally cylindrical shape with a smooth exterior surface extending substantially its entire length. An end cap (86) is press fit around an end of the piston rod (80) and includes a flange portion (108) extending annularly outwardly for engaging a return spring (94). A piston guide (90) includes a tubular portion (96) guiding the piston rod and a shoulder (92) for engaging the return spring (94). A throat (112) of the piston guide (90) holds a gland seal (120) surrounding the piston rod. An outlet valve housing (130) includes a tubular protrusion (138) extending into the throat (112) of the piston guide to hold the gland seal (120).
HYDRAULIC CONTROL UNIT WITH PISTON PUMP
HYDRAULISCHE STEUEREINHEIT MIT KOLBENPUMPE
UNITÉ DE COMMANDE HYDRAULIQUE AVEC POMPE À PISTON
2021-12-01
Patent
Elektronische Ressource
Englisch
Pump arrangement for a hydraulic unit having a pump piston
Europäisches Patentamt | 2021
|Pump Arrangement for a Hydraulic Unit Having a Pump Piston
Europäisches Patentamt | 2020
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