Control device to achieve variable compression ratio for triangle rotary engine

Patent metadata

Field	Value
Publication number	US-10995618-B2
Application number	US-201715749461-A
Country	US
Kind code	B2
Filing date	May 17, 2017
Priority date	Dec 6, 2016
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

An actuator of a rotary engine that can realize different compression ratios includes three parts: an eccentric shaft, a triangle rotor and a control system. The eccentric shaft includes the front part of the eccentric shaft, the combination of an electric three-jaw and the rear part of the eccentric shaft. The triangle rotor includes the variable volume actuator, the front part of the rotor and the rear part of the rotor. The control system controls expansion and contraction of the electric three-jaw. The eccentric shaft part passes through the triangle rotor part to make the combination of electric three jaw to arrange in the annular groove. The reciprocating motion of the variable volume actuator is controlled by the expansion and contraction of the claw top of the electric three-jaw. Engine compression ratio may therefore be adjusted using the compression ratio adjustment system.

First claim

The invention claimed is:

1. An actuator for a rotary engine comprising:
an eccentric shaft comprising an electric three-jaw having first, second, and third claw tops each connected to a respective first, second, and third inner support arc blocks;
a triangle rotor comprising:
a rotor pocket formed in an outer surface of the triangle rotor,
an interior opening within the rotor, and
a through hole connecting the rotor pocket and the interior opening;

a variable volume actuator comprising a variable volume plate and an outer support arc block, wherein:
the variable volume plate is located within the rotor pocket,
the outer support arc block is located within the interior opening,
the variable volume plate and the outer support arc block are fixedly connected to one another by a connecting cylinder that extends through the through hole,
the variable volume actuator is configured to telescopically move with respect to the rotor; and

a control system configured to control expansion and contraction of the electric three-jaw based on electrical signals received at the control system through a wire passing through the eccentric shaft, causing movement of the first, second, and third claw tops and their corresponding respective first, second, and third inner support arc blocks to actuate the variable volume actuator such that the variable volume plate moves within the rotor,
wherein when the actuator is used in the rotary engine, movement of the variable volume plate within the rotor pocket achieves different compression ratios for the rotary engine, further wherein the variable volume plate is arranged with a seal groove comprising a wave spring and a sealing strip installed on an outside of the wave spring to form a seal between the variable volume plate and the rotor pocket.

2. The actuator for a rotary engine of claim 1 , wherein a shape of the rotor pocket is a square groove.

3. The actuator for a rotary engine of claim 1 , wherein an angle of each of two ends of the outer support arc block are chamfered outwards, so that an outer arc length of a section of the outer support arc block is longer than an inner arc length of the section of the outer support arc block.

4. The actuator for a rotary engine of claim 1 , wherein an angle of each of two ends of the inner support arc block are chamfered inwards, so that an outer arc length of a section of inner support arc block is shorter than an inner arc length of the section of inner support arc block.

5. The actuator for a rotary engine of claim 1 , wherein:
the eccentric shaft further comprises a front part and a rear part each having an eccentric circular table; and
the front part comprises a second through hole having the wire passing therethrough.

6. The actuator for a rotary engine of claim 5 , wherein the eccentric circular table of the front part of the eccentric shaft is coaxial with the electric three-jaw and the eccentric circular table of the rear part of the eccentric shaft.

7. The actuator for a rotary engine of claim 1 , wherein the triangle rotor comprises a front part and a rear part fixedly connected by a bolt, and further wherein the interior opening within the rotor is formed by a first annular groove in the front part and a second annular groove in the rear part.

8. The actuator for a rotary engine of claim 7 , wherein the rotor pocket is formed by a combination of first openings in the outer surfaces of the front part and the rear part of the triangle rotor, and further wherein the through hole is also formed by a combination of second openings between the first openings and the first and second annular grooves.

9. The actuator for a rotary engine of claim 1 , further comprising at least one extension spring connected to the variable volume plate and a surface of the rotor pocket.

Assignees

• Univ Jiangsu

Inventors

• Fan Baowei
• Pan Jianfeng
• Lu Yao
• Chen Wei

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02D15/04 Primary

  by alteration of volume of compression space without changing piston stroke · CPC title

• F02B55/02

  Pistons · CPC title

• F01C21/08

  Rotary pistons (reciprocating pistons in general F16J) · CPC title

• F01C1/22

  of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member · CPC title