Patent ID: 6712735
Filing Date: 2004-03-30
Classification: B60W,F16H,Y10T

Abstract:
A control apparatus for an automatic transmission wherein operation of four engagement elements is required at the time of a speed-change operation from a first speed-change stage to a second speed-change stage, wherein the first speed-change stage is established through engagement of a first engagement element and a second engagement element, and wherein the second speed-change stage is established through engagement of a third engagement element and a fourth engagement element, comprising:input torque control means for starting to adjust a torque input to the automatic transmission during engagement control of the third engagement element and during engagement control of the fourth engagement element respectively, wherein the input torque control means starts to reduce the input torque during engagement control of the third engagement element and during engagement control of the fourth engagement element respectively, and release of the second engagement is started after release of the first engagement element has been started, and engagement of the fourth engagement element is completed after engagement of the third engagement element has been completed.