US 10,480,616 B2 · Crankshaft damper for an internal combustion engine

Abstract

An engine assembly has a damper rotationally coupled to a crankshaft. The damper has first and second spokes connecting a hub to an inertial weight, with the inertial weight circumferentially surrounding and spaced apart from the hub. Each of the spokes has an airfoil section. The first spoke is oriented with a positive angle of attack and the second spoke is oriented with one of a negative angle of attack and a zero angle of attack. A crankshaft damper is provided by a member having first and second spokes extending radially outwardly from a huh to an outer rim supporting an inertial weight. A chord associated with the first spoke is oriented at a first angle of attack relative to a rotational plane of the member. A chord associated with the second spoke is oriented at a second angle of attack relative to the rotational plane.

Claims20

Dependent claims

An engine assembly comprising:

a crankshaft;
and
a damper rotationally coupled to the crankshaft and having first and second spokes connecting a hub to an inertial weight, the inertial weight circumferentially surrounding and spaced apart from the hub, each of the spokes having an airfoil section, the first spoke oriented with a positive angle of attack and the second spoke oriented with one of a negative angle of attack and a zero angle of attack.

Dependencies are inferred from the claim text.

Facts

Application

15/793,167Filed 25 Oct 2017

Published

US 2019/0120323 A125 Apr 2019

Granted

19 Nov 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

F16F 15/26
Compensation of inertia forces: of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system , i.e. masses…
F16F 15/136
Using springs as elastic members, e.g. metallic springs: plastics springs, e.g. made of rubber
F16F 15/283
Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of…:…
F16F 15/315
Flywheels: characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft

Crankshaft damper for an internal combustion engine

Life of this patent

Crankshaft damper for an internal combustion engine

Life of this patent

Abstract

Claims20