CONTROL METHOD FOR ENGINE

Japanese Patent JPH0367009

A

PURPOSE:To enable continuous operation always without obstruction by changing over and fixing the operating characteristics of another without valve capable of being changed over even though part of a valve with possibility of changing over its operating characteristics is fixed to the operation in the applicable operating characteristics due to malfunction of a valve operating characteristics changeover mechanism. CONSTITUTION:Assuming that a coupling changeover means 21a makes malfunc tion, other normally operating coupling changeover means 21b, 21c, 21d are put in coupling disengaged condition and fixed if the first named means is fixed to the low speed valve operation characteristics LVT. Thus, all valves can be operated in the low speed valve operating characteristics. This is trans ferred to the high torque side valve operating characteristics when the number of revolutions NeNl. Thus the transmission concerned is controlled with a control map selected, which corresponds to the engine output in the condition that the high torque side valve operating characteristics are used while Ne