Patent ID: 8187150
Filing Date: 2012-05-29
Classification: F16H,Y10T

Abstract:
1. A control apparatus for an automatic transmission where a gear of a first gear ratio is implemented when a first friction element and a second friction element are in an engaged state and when a third friction element and a fourth friction element are in a disengaged state, and a gear of a second gear ratio is implemented when said first friction element and said second friction element are in said disengaged state and when said third friction element and said fourth friction element are in said engaged state, at the time of a shift from said gear of said first gear ratio to said gear of said second gear ratio, said control apparatus disengaging said first friction element, and increasing engagement force of said third friction element with said second friction element disengaged to and maintained in a predetermined state, and said predetermined state being a fixed engagement force in which said second friction element makes a transition from said engaged state to said disengaged state in the middle of the increase in said engagement force of said third friction element.