US 11,927,119 B2
Oil return valve for a crankcase ventilation system
Johannes Klosterberg, Swisttal (DE); Marco Sliwa, Siegburg (DE); and Thomas Werner, Cologne (DE)
Assigned to Deutz Aktiengesellschaft, Cologne (DE)
Appl. No. 17/619,000
Filed by DEUTZ Aktiengesellschaft, Cologne (DE)
PCT Filed May 13, 2020, PCT No. PCT/EP2020/000095
§ 371(c)(1), (2) Date Dec. 14, 2021,
PCT Pub. No. WO2020/253979, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 102019004377.4 (DE), filed on Jun. 19, 2019.
Prior Publication US 2022/0397046 A1, Dec. 15, 2022
Int. Cl. F01M 13/04 (2006.01); F01M 13/00 (2006.01)
CPC F01M 13/04 (2013.01) [F01M 2013/0044 (2013.01); F01M 2013/0494 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An oil return valve for a crankcase ventilation system of an internal combustion engine, the oil return valve being arranged in a crankcase of the internal combustion engine and comprising:
a first bore in the crankcase;
a second bore in the crankcase;
wherein the first bore and the second bore jointly form a stepped bore; and
a third bore in the crankcase;
wherein the third bore ends in the second bore;
wherein a longitudinal axis of the first bore and a longitudinal axis of the third bore are spaced from each other;
a valve cylinder which is inserted in the second bore and completes the oil return valve; and
a valve pipe arranged in the first bore such that an annular chamber is formed between the valve pipe and a bore wall of the first bore.