Drive by wire control device for an internal combustion engine and a continuous variable transmission using engine torque correction means based on acceleration to determine a rate-of-change of speed-ratio correction means

In a control device for an internal combustion engine and a continuous variable transmission, said internal combustion engine is mounted on a vehicle and said continuous variable transmission is disposed between said internal combustion engine and driving wheels and a transmission ratio of said continuous variable transmission is continuously changeable, said control device comprising:

• engine output adjusting means for adjusting an output of said internal combustion engine without depending upon operational amount of a driver-operable member;
• operational amount detecting means for detecting operational amount of said driver-operable member to produce an operational amount signal;
• target transmission ratio determining means for determining a target transmission ratio for said continuous variable transmission in response to said operational amount signal to produce a target transmission ratio signal;
• transmission ratio detecting means for detecting an actual transmission ratio of said continuous variable transmission to produce an actual transmission ratio signal;
• transmission ratio deviation calculating means for calculating a deviation between said target transmission ratio determined by said target transmission ratio determining means and said actual transmission ratio detected by said transmission ratio detecting means to produce a transmission ratio deviation signal;
• changing speed determining means for determining a changing speed of the transmission ratio in response to said transmission ratio deviation signal to produce a changing speed signal;
• driving condition detecting means for detecting a driving condition of the vehicle to produce a driving condition signal, wherein said driving condition includes at least an actual acceleration of said vehicle which is a time-dependent variation of the running speed of said vehicle;
• target acceleration determining means for determining a target vehicle acceleration in response to said driving condition signal to produce a target acceleration speed signal;
• acceleration deviation calculating means for calculating an acceleration deviation between said target vehicle acceleration determined by said target acceleration determining means and said actual vehicle acceleration detected by said driving condition detecting means to produce an acceleration deviation signal;
• engine torque correction amount determining means for producing in response to said acceleration deviation signal an engine torque correction amount signal, wherein said engine torque correction amount signal is required for eliminating said acceleration deviation calculated by said acceleration deviation calculating means;
• engine torque controlling means for controlling said engine output adjusting means on the basis of said engine torque correction amount signal when an engine torque can be changed by said engine torque correction amount, and on the basis of a restricted engine torque correction amount when the engine torque cannot be changed by said engine torque correction amount, wherein said restricted engine torque correction amount is obtained by restricting said engine torque correction amount within a range where the engine torque can be changed;
• transmission ratio changing speed correcting means for correcting said changing speed of the transmission ratio determined by said changing speed determining means, when said engine torque correction amount is restricted, on the basis of a deficient torque to produce a corrected changing speed signal, wherein said deficient torque is lacked by restricting said engine torque correction amount;
• and
• transmission controlling means for controlling said continuous variable transmission in response to said corrected changing speed signal so that an actual transmission ratio converges to said target transmission ratio determined by said target transmission ratio determining means with the changing speed of the transmission ratio corrected by said changing speed correcting means.