| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a line pressure control system for an automatic transmission for stabilizing line pressure, simplifying structure to reduce cost, and shortening the whole system length to improve a degree of design freedom. SOLUTION: This line pressure control system for an automatic transmission comprises a regulator valve of which changeable control pressure and combined force of an elastic member are balanced with line pressure against the combined force and combined force of range pressure supplied from other ranges than the R-range. This regulator valve comprises a valve body, a valve spool inserted into the valve body to which the variable control pressure, line pressure, and range pressure act, and the elastic member provided between the valve body and the valve spool.</p> |
