VARIABLE TUMBLE SYSTEM OUTLINE [L3 R.H.D.]

BUE011300050N01

• The variable tumble system functions to lower emissions at cold-engine start and during periods of low load.
• At cold-engine start and during periods of low load, the VTCS increases intake airflow speed by closing the shutter valve and narrowing the intake passage. As a result, the air-fuel mixture quality from the injector is improved. Additionally, the creation of a powerful air tumble in the combustion chamber promotes the atomization of the air-fuel mixture. Due to this, exhaust emission efficiency is improved.
• For variable tumble control, refer to variable tumble control under the control system. (See VARIABLE TUMBLE CONTROL OUTLINE [L3 R.H.D.].)