US 12,264,618 B2
Power unit
Frank Obrist, Lustenau (AT); and Oliver Obrist, Lustenau (AT)
Assigned to Obrist Technologies GmbH, Lustenau (AT)
Filed by Obrist Technologies GmbH, Lustenau (AT)
Filed on Mar. 2, 2021, as Appl. No. 17/190,095.
Claims priority of application No. 102020001432.1 (DE), filed on Mar. 5, 2020.
Prior Publication US 2021/0277823 A1, Sep. 9, 2021
Int. Cl. F02B 75/18 (2006.01); B60K 6/24 (2007.10); F01L 1/02 (2006.01); F01L 1/047 (2006.01); F01L 1/14 (2006.01); F02B 75/40 (2006.01); F16F 15/30 (2006.01)
CPC F02B 75/18 (2013.01) [B60K 6/24 (2013.01); F01L 1/022 (2013.01); F01L 1/024 (2013.01); F01L 1/047 (2013.01); F01L 1/14 (2013.01); F02B 75/40 (2013.01); F16F 15/30 (2013.01); F02B 2075/1808 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A power unit, with
a twin-cylinder reciprocating piston engine causing first and second order mass forces, which has two pistons that are guided in two cylinders in tandem arrangement, and two counter-directional crankshafts which are connected with the two pistons by connecting rods,
at least one generator, which is rotatable co-directionally to a first crankshaft of the two counter-directional crankshafts and counter-directionally to a second crankshaft of the two counter-directional crankshafts, and
a camshaft having valve cams, which are operatively connected with control valves,
characterized in that a flywheel mass element, which is arranged on the second crankshaft or on a flywheel mass compensating shaft,
wherein the camshaft is designed to compensate the second order mass forces, wherein the camshaft comprises at least two compensating cam elements, a first compensating cam element and a second compensating cam element, wherein the first compensating cam element is operatively connected with a first linearly guided compensating mass, and the second compensating cam element is operatively connected with a second linearly guided compensating mass, wherein the first compensating mass and the second compensating mass move linearly and parallel to each of the pistons in the cylinders,
wherein the at least two compensating cam elements has four compensating cams, wherein the camshaft rotates half as quickly as the first and second crankshafts.