发明名称 |
SELECTIVE AUTOMATIC SHIFT GEARING |
摘要 |
An automatic transmission shift control system is provided for work vehicles, such as front-end loaders, which permits automatic shifting between first and second gears in response to vehicle speed but which inhibits downshift for a predetermined time interval after initiating reversal of the vehicle. A speed signal generator produces shift point signals at predetermined speed values and a speed logic circuit responds to the shift point signal for producing respective upshift and downshift signals. An inhibit circuit produces an inhibit signal in response to a reversing signal. The speed logic circuit is responsive to the inhibit signal for delaying the change from an upshift control signal to a downshift control signal for a time interval corresponding to the duration of the inhibit signal. The inhibit circuit is disabled when the speed decision logic circuit produces a downshift signal so that an upshift of the transmission may occur during reversal. |
申请公布号 |
JPS59205051(A) |
申请公布日期 |
1984.11.20 |
申请号 |
JP19840082145 |
申请日期 |
1984.04.25 |
申请人 |
CLARK EQUIP CO |
发明人 |
GIRUBAATO EDOWAADO REJINSUKII |
分类号 |
F16H61/18;F16H59/02;F16H59/44;F16H61/02;F16H61/16 |
主分类号 |
F16H61/18 |
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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