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Title:
CRANK TRAIN FOR REALIZING MILLER CYCLE AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2019/137278
Kind Code:
A1
Abstract:
A crank train for realizing a Miller cycle and a control method. A driving oil passage (6) and a locking oil passage (7) are provided in a crankshaft (2). An eccentric connecting rod bushing (4) is arranged on a connecting rod journal (14) of the crankshaft (2). A driving gear (b3) meshing with an outer-meshing gear ring (15) of the eccentric connecting rod bushing via an idle gear (12) is mounted inside a crankshaft counter weight (9). A planetary gear (c3) is mounted in a hollow driving gear shaft (b2). The hollow driving gear shaft (b2) is provided with a locking pin (10) for locking the same to the crankshaft counter weight (9) or to a planetary gear shaft (c4). The hollow driving gear shaft (b2) and the planetary gear shaft (c4) are locked when hydraulic oil is fed into the driving oil passage (6), such that the planetary gear shaft (c4) transmits motion to the driving gear (b3), then the idle gear (12) transmits the motion to the outer-meshing gear ring (15) of an eccentric connecting rod bushing, and the eccentric connecting rod bushing (4) rotates around the connecting rod journal (14) of the crankshaft, thereby changing the compression ratio of an engine. Motion of the crank train is synchronized with rotation of the engine, thereby achieving compression ratio adjustment within one operation stroke of the engine, and realizing the Miller cycle. The invention has a large control margin and flexible control.

Inventors:
TIAN, Wei (No.999 Jinzhou Road, Tuqiao Jinniu Zon, Chengdu Sichuan 9, 610039, CN)
CHU, Yunlu (No.999 Jinzhou Road, Tuqiao Jinniu Zon, Chengdu Sichuan 9, 610039, CN)
HU, Mingyan (No.999 Jinzhou Road, Tuqiao Jinniu Zon, Chengdu Sichuan 9, 610039, CN)
XIAO, Bang (No.999 Jinzhou Road, Tuqiao Jinniu Zon, Chengdu Sichuan 9, 610039, CN)
WU, Xueshun (No.999 Jinzhou Road, Tuqiao Jinniu Zon, Chengdu Sichuan 9, 610039, CN)
HAN, Zhiqiang (No.999 Jinzhou Road, Tuqiao Jinniu Zon, Chengdu Sichuan 9, 610039, CN)
Application Number:
CN2019/070088
Publication Date:
July 18, 2019
Filing Date:
January 02, 2019
Export Citation:
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Assignee:
XIHUA UNIVERSITY (No.999 Jinzhou Road, Tuqiao Jinniu Zon, Chengdu Sichuan 9, 610039, CN)
International Classes:
F02B75/04
Foreign References:
CN108590849A2018-09-28
CN208010466U2018-10-26
CN204253195U2015-04-08
CN201027899Y2008-02-27
CN104533636A2015-04-22
US4377992A1983-03-29
Attorney, Agent or Firm:
CHENGDU HECHUANGZHIJIA INTELLECTUAL PROPERTY AGENCY CO., LTD (707 Room, Unit 2 Building 1, 108 East 5th Section, 1st Ring Road, Jinjiang Distric, Chengdu Sichuan 5, 610065, CN)
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