TY - JOUR
T1 - Research on timing method of two shifting actuators filling and draining hydraulic oil during shifting
AU - Li, Chun Fu
AU - Chen, Hui Yan
N1 - Publisher Copyright:
©, 2015, China Ordnance Society. All right reserved.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - The shifting process of automatic transmission is an alternating process of two actuators filling and draining the hydraulic oil. The improper oil filling and draining of two shifting actuators may cause power interruption or too much overlap, power lose, impact of shifting and aggravated wear of shift actuator. Lagrange equation is used to establish the dynamic equation of the shifting process by taking Allison automatic transmission (HD4070PR) as the study subject. The timing method of two shifting actuators filling and draining hydraulic oil during shifting process is analyzed on the basis of the equation, and verified by real vehicle test. The research results show that, for the upshifting process, the power shifting can be realized, and the impact of shifting can be reduced through the rational power lap; and for the downshift process, since the emergence of power interruption is inevitable, only the loss of the power should be reduced as far as possible.
AB - The shifting process of automatic transmission is an alternating process of two actuators filling and draining the hydraulic oil. The improper oil filling and draining of two shifting actuators may cause power interruption or too much overlap, power lose, impact of shifting and aggravated wear of shift actuator. Lagrange equation is used to establish the dynamic equation of the shifting process by taking Allison automatic transmission (HD4070PR) as the study subject. The timing method of two shifting actuators filling and draining hydraulic oil during shifting process is analyzed on the basis of the equation, and verified by real vehicle test. The research results show that, for the upshifting process, the power shifting can be realized, and the impact of shifting can be reduced through the rational power lap; and for the downshift process, since the emergence of power interruption is inevitable, only the loss of the power should be reduced as far as possible.
KW - Control science and technology
KW - Hydraulic mechanical automatic transmission
KW - Shifting actuator
KW - Timing method
UR - http://www.scopus.com/inward/record.url?scp=84928378308&partnerID=8YFLogxK
U2 - 10.3969/j.issn.1000-1093.2015.01.002
DO - 10.3969/j.issn.1000-1093.2015.01.002
M3 - Article
AN - SCOPUS:84928378308
SN - 1000-1093
VL - 36
SP - 12
EP - 18
JO - Binggong Xuebao/Acta Armamentarii
JF - Binggong Xuebao/Acta Armamentarii
IS - 1
ER -