Manual Description
The basic ignition timing is programmed within the anti-knocking zone, if recommended fuel is used under dry conditions. Each control unit transmits/receives data but selectively reads required data only. This makes it possible to control the shut/open timing of the intake valve to increase engine torque in low/mid speed range and output in high-speed range.
While idling and during low engine coolant temperature, the tumble control valve closes. Thus the velocity of L the air in the intake passage increases, promoting the vaporization of the fuel and producing a tumble in the combustion chamber. Because of this operation, this system tends to increase the burning speed of the gas mixture, improve fuel consumption, and increase the stability in running conditions.
M Also, except when idling and during low engine coolant temperature, this system opens the tumble control valve. In this condition, this system tends to increase power by improving intake efficiency via reduction of intake flow N resistance. These items are required by legal regulations to continuously monitor the system/component.
Manual Cover
General