An engine output for bringing the drive power of a motor vehicle to a requested value is determined as a target output. One of the lean burn and the stoichiometric burn is selected as a combustion form that achieves a best fuel consumption performance in t...

The present invention provides an engine power train control method and control apparatus for a vehicle having an engine and an automatic transmission capable of quickly changing an air-fuel ratio to meet the requirements of the exhaust gas without produci...

A control apparatus of an automatic transmission capable of achieving a smooth change of output shaft torque to torque which can be generated by a friction clutch, thus enabling a smooth gear change even if the output shaft torque is high at the gear chang...

When an engine control unit (70) controls an engine rotation speed Ne to an idle rotation speed, and a select range is changed over from a non-travel range to a travel range, a speed change control unit (80) commands an increase of engine torque supplied t...

In the event of difficulty, the electronic engine unit limits acceleration. Such difficulty is detected through a communication link, and is constituted by e.g. failure to detect gear change by the electronic gear unit and/or failure to change to the selec...

Using the accelerator pedal input value (PWG') for drive in traction, two intermediate values are determined. The first (ZM1) is determined from a first function (ZF1), the second (SM) from a second function (SF). The values are added (ADD) to form a desir...

A control system for a vehicle including a continuously variable transmission (10) is constructed: such that a target output of a prime mover (1) for achieving a target driving force is determined on the basis of the target driving force; such that a targe...

The method involves performing a transmission ratio regulator operation by determining a desired transmission ratio and a desired engine torque while the regulated transmission variable is changed, such that the determined actual transmission ratio corresp...

Disclosed is a shift control method for an automatic transmission comprising the steps of converting to a lean-burn mode from a normal mode if a throttle voltage is less than a first predetermined value; determining if tip-in has occurred in the lean-burn ...