Patent ID: 6216073
Filing Date: 2001-04-10
Classification: B60W,F16H,Y10S,Y10T

Abstract:
A speed change control apparatus for an automatic transmission comprising:running resistance calculation means for calculating a vehicle running resistance;drive force calculation means for calculating a drive force;down-shift requirement outputting means for outputting a down-shift requirement when said running resistance is greater than the sum of said drive force and a threshold value;accelerator opening detecting means for detecting an accelerator opening;judgement level setting means for setting a judgement level of said accelerator opening higher as the accelerator opening increases;down-shift requirement cancellation means for canceling said down-shift requirement output from said down-shift requirement output means, when said accelerator opening detected by said accelerator opening detecting means is smaller than said judgement level; anddown-shift control means for carrying out a down-shift based on said down-shift requirement.