Variable compression ratio device
View Patent ↗A variable compression ratio device is configured to be incorporated into an internal combustion engine. The internal combustion engine includes one or more cylinders housing pistons that are coupled to a crankshaft. The variable compression ratio device includes a rotation coupler assembly formed by gears that have internal and external teeth, the rotation coupler assembly being disposed at a distal end of the crankshaft to cause the crankshaft to rotate. Translation variations of the crankshaft are to be converted into rotation and transmitted to at least one of a toothed gear or a flange of a flywheel.
1. A device configured to enable a variable compression ratio of an internal combustion engine, the device comprising:
a first rotation coupler assembly disposed at a first distal end of a crankshaft of the internal combustion engine and a second rotation coupler assembly disposed at a second distal end of the crankshaft, wherein each of the first rotation coupler assembly and the second rotation coupler assembly are individually formed by a first gear having internal teeth and a second gear having external teeth, wherein translation variations of the crankshaft are to be converted into rotation, and wherein rotation of the crankshaft is to be transmitted to a toothed gear by the first rotation coupler assembly and to a flywheel by the second rotation coupler assembly.
2. The device of claim 1 , further comprising two or more eccentrics configured to cause the translation variations of the crankshaft, wherein each of the two or more eccentrics is positioned on a trunnion of the crankshaft proximate a connecting rod and a respective balance.
3. The device of claim 2 , wherein the two or more eccentrics are aligned with corresponding gears to cause changes in translation of a position of the crankshaft responsive to actuation by an electronic control unit that causes a step motor or servomotor to transfer movements of the step motor or the servomotor to a shaft that has a same quantity of intermediate gears as a quantity of the corresponding gears joined to the two or more eccentrics.
4. The device of claim 3 , wherein
the second rotation coupler assembly comprises a first crown coupled to the flywheel and a first sprocket coupled to the second distal end of the crankshaft, and wherein the first rotation coupler assembly comprises
a second crown coupled to the toothed gear and a second sprocket coupled to the first distal end of the crankshaft, wherein the first rotation coupler assembly and the second rotation coupler assembly are configured to transfer rotation of the crankshaft while isolating translational motion of the crankshaft.
5. The device of claim 3 ,
further comprising an eccentric actuator.
6. The device of claim 3 , wherein the device is an accessory or kit to be installed in the internal combustion engine.
7. The device of claim 3 , wherein the corresponding gears are at least one of partial or complete, the corresponding gears being associated with the two or more eccentrics, wherein the two or more eccentrics are configured to turn to alter a position of the crankshaft in relation to a top of one or more cylinders.
8. A device configured to be incorporated into an internal combustion engine to variably alter a compression ration of the internal combustion engine, the device comprising:
a first rotation coupler assembly disposed at a first distal end of a crankshaft of the internal combustion engine, wherein the first rotation coupler assembly comprises a first set of gears having internal and external teeth; and
a second rotation coupler assembly disposed at a second distal end of the crankshaft of the internal combustion engine, wherein the second rotation coupler assembly comprises a second set of gears having internal and external teeth, wherein a turn of the crankshaft is configured to turn a flywheel via the second rotation coupler assembly or a toothed gear via the first rotation coupler assembly.
9. The device of claim 8 , further comprising:
an eccentric actuator configured to cause changes in a relative position of the crankshaft; and
an electronic control unit that is configured to actuate a step motor or servomotor to cause eccentrics of the eccentric actuator to change the relative position of the crankshaft in relation to a top of cylinders of the internal combustion engine to control the compression ratio of the internal combustion engine.
10. The device of claim 9 , wherein the second rotation coupler assembly comprises
a first crown coupled to the flywheel and a first sprocket coupled to the second distal end of the crankshaft, and wherein the second rotation coupler assembly comprises a second crown coupled to the toothed gear and a second sprocket coupled to the first distal end of the crankshaft, wherein the first rotation coupler assembly and the second rotation coupler assembly are configured to transfer rotation of the crankshaft while isolating translational motion of the crankshaft.
11. The device of claim 9 , wherein the device is an accessory or kit to be installed in the internal combustion engine.
12. The device of claim 9 , wherein corresponding gears are at least one of partial or complete, the corresponding gears being associated with the eccentrics, and wherein the eccentrics are configured to turn to alter the relative position of the crankshaft in relation to the top of the cylinders.
13. The device of claim 9 , wherein a portion of the second rotation coupler assembly is attached directly to the flywheel and a portion of the first rotation coupler assembly is attached directly to the toothed gear.
14. An internal combustion engine comprising:
a crankshaft;
one or more cylinders housing pistons that are coupled to the crankshaft; and
a variable compression ratio device comprising:
a first rotation coupler assembly disposed at a first distal end of the crankshaft, wherein the first rotation coupler assembly comprises a first gear having internal teeth and a second gear having external teeth; and
a second rotation coupler assembly disposed at a second distal end of the crankshaft, wherein the second rotation coupler assembly comprises a third gear having internal teeth and a fourth gear having external teeth,
wherein translation variations of the crankshaft are to be converted into rotation and transmitted to a toothed gear by the first rotation coupler assembly and a flywheel by the second rotation coupler assembly.
15. The internal combustion engine of claim 14 , further comprising two or more eccentrics configured to cause translation variations of the crankshaft, wherein the two or more eccentrics are positioned on trunnions of the crankshaft before and after each connecting rod and respective balances.
16. The internal combustion engine of claim 15 , wherein the translation variations of the crankshaft are to be converted into rotation and transmitted to the toothed gear and to the flywheel, and wherein the two or more eccentrics are aligned with corresponding gears to cause changes in translation of a position of the crankshaft responsive to actuation by an electronic control unit that causes a step motor or servomotor to transfer movements of the step motor or the servomotor to a shaft that has a same quantity of intermediate gears as a quantity of the corresponding gears joined to the two or more eccentrics.
17. The internal combustion engine of claim 16 , wherein the second rotation coupler assembly comprises:
a first crown coupled to the flywheel and a first sprocket coupled to the second distal end of the crankshaft, and wherein the first rotation coupler assembly comprises
a second crown coupled to the toothed gear and a second sprocket coupled to the first distal end of the crankshaft, wherein the first rotation coupler assembly and the second rotation coupler assembly are configured to transfer rotation of the crankshaft while isolating translational motion of the crankshaft.
18. The internal combustion engine of claim 16 ,
further comprising an eccentric actuator.
19. The internal combustion engine of claim 16 , wherein the corresponding gears are at least one of partial or complete, the corresponding gears being associated with the two or more eccentrics, wherein the two or more eccentrics are configured to turn to alter, a position of the crankshaft in relation to a top of the one or more cylinders.