TY - JOUR
T1 - Power Transmission of Half-Toroidal Traction Drive Continuously Variable Transmission (Four-Wheel-Drive CVT Design and Its Performance)
AU - Tanaka, Hirohisa
AU - Eguchi, Masatoshi
AU - Machida, Hisashi
AU - Imanishi, Takashi
PY - 1995
Y1 - 1995
N2 - Four-wheel drive offers cruising stability and high road gripping force at the expence of the power weight ratio due to implementation of an additional mechanism of a center differential gear box with a torque split clutch. We developed a dual-cavity half-toroidal traction-drive continuously variable power transmission (CVT) for 3 L passenger cars in 1990, which can be easily remodelled into a CVT with two output shafts since it has two independent CVT units. Since the CVT has a hydraulic-control equal-force-transmitting mechanism for speed ratio control, it is easy to synchronize the force transmission of front and rear axles without using a center differential gear box. In this paper we describe the mechanism, efficiency and control principle for the equivalent function of a center differential gear box of the four-wheel-drive CVT with nominal input torque capacity of 250 N•m, rotational speed of 5500 rpm and maximum speed ratio range of 1: 8.7.
AB - Four-wheel drive offers cruising stability and high road gripping force at the expence of the power weight ratio due to implementation of an additional mechanism of a center differential gear box with a torque split clutch. We developed a dual-cavity half-toroidal traction-drive continuously variable power transmission (CVT) for 3 L passenger cars in 1990, which can be easily remodelled into a CVT with two output shafts since it has two independent CVT units. Since the CVT has a hydraulic-control equal-force-transmitting mechanism for speed ratio control, it is easy to synchronize the force transmission of front and rear axles without using a center differential gear box. In this paper we describe the mechanism, efficiency and control principle for the equivalent function of a center differential gear box of the four-wheel-drive CVT with nominal input torque capacity of 250 N•m, rotational speed of 5500 rpm and maximum speed ratio range of 1: 8.7.
KW - Automobile
KW - Continuously Variable Transmission
KW - Four-Wheel Drive
KW - Power Transmission
KW - Traction Drive
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U2 - 10.1299/jsmec1993.38.778
DO - 10.1299/jsmec1993.38.778
M3 - Article
AN - SCOPUS:0029517819
SN - 1340-8062
VL - 38
SP - 778
EP - 782
JO - JSME International Journal, Series C: Dynamics, Control, Robotics, Design and Manufacturing
JF - JSME International Journal, Series C: Dynamics, Control, Robotics, Design and Manufacturing
IS - 4
ER -