| 摘要 |
A rear track suspension for a snowmobile having a single resilient element f or biasing both the front and rear arms. The slide rail is permitted to pitch between first and second pitching constraints in response to terrain obstacles in a gradual manner as the motion constraints are approached. This reduces jarring of the rider when th e pitching constraints are met. Suspension compression exhibits an initial falling rate motion ratio, followed by a constant rate motion ratio, followed by a rising rate motion ratio. This U- shaped motion ratio profile advantageously provides cushioning upon landing along with a resistance to bottoming out of the suspension upon full compression. The result is an improved ride without sacrificing suspension performance.
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