发明名称 |
Continuously variable multi-range powertrain with a geared neutral |
摘要 |
A powertrain has an engine, a multi-range continuously variable transmission (CVT) and a final drive mechanism. The CVT has a continuously variable unit (CVU) and a planetary gear set. A plurality of friction devices that are selectively connectable to establish three forward ranges and one reverse range wherein the CVU is effective to provide infinitely variable ratios between the engine and the final drive mechanism. One friction device is engaged during a geared neutral condition, a first forward range and a reverse range. The neutral condition is established by setting the CVU at a predetermined ratio. The reverse range is operated by changing the CVU ratio toward a maximum underdrive ratio from the neutral condition and the first forward range is operated by changing the CVU ratio toward a maximum overdrive ratio. The second and third forward ranges are established by synchronously interchanging friction devices.
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申请公布号 |
US6045477(A) |
申请公布日期 |
2000.04.04 |
申请号 |
US19990332408 |
申请日期 |
1999.06.14 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
SCHMIDT, MICHAEL ROLAND |
分类号 |
F16H37/08;(IPC1-7):F16H37/02 |
主分类号 |
F16H37/08 |
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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