发明名称 |
SERVO-ASSISTED CONTROL SYSTEM FOR THE GEARS OF A DOUBLE CLUTCH GEARBOX OF A MOTOR VEHICLE |
摘要 |
The control system comprises: a first hydraulically-operated actuator device for controlling the engagement of a first set of gears by selection and engagement movements; a second hydraulically-operated actuator device for controlling the engagement of a second set of gears by selection and engagement movements; a first solenoid valve of the ON/OFF type arranged to put the first or the second actuator device alternatively into communication with a supply of fluid under pressure; a second solenoid valve of the ON/OFF type arranged to control the selection movements of the actuator device which from time to time is in communication with the fluid supply; a distributor interposed between the fluid supply and the two actuator devices and displaceable under the control of the first solenoid valve between a first working position in which it puts the fluid supply into communication with the first actuator device and a second working position in which it puts the fluid supply into communication with the second actuator device; a third proportional pressure solenoid valve and a fourth proportional pressure solenoid valve arranged to control the engagement movements of the actuator device which from time to time is in communication with the fluid supply. With such a control system the gear change operation thus requires the intervention of at most four solenoid valves.
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申请公布号 |
US2009071276(A1) |
申请公布日期 |
2009.03.19 |
申请号 |
US20080268784 |
申请日期 |
2008.11.11 |
申请人 |
C.R.F. SOCIETA CONSORTILE PER AZIONI |
发明人 |
BALDASCINI FILIPPO;CAENAZZO DARIO;MESITI DOMENICO;PREGNOLATO GIANLUIGI |
分类号 |
F16H59/04 |
主分类号 |
F16H59/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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