that each cylinder has an independent throttle valve to control the intake air amount.
1. Multi-injection effect throat
By increasing the overall area of the throttle valve, the intake air amount of the cylinder is improved. Since each has an independent air flow throttle valve sensor, also to achieve a precise control of the air-fuel ratio of each cylinder. So that the engine power is greatly improved. In particular increasing the engine power output in subsequent stage.
2. Advantages and disadvantages of multi-injection throat
smaller independent throttle valve to reduce the weight and thus improving the response performance. Increasing the total area of the intake valve of the engine can be also more air, the shorter the intake manifold can significantly improve the efficiency of the intake air when the engine high revolution. The use of the shorter intake manifold, so that the intake pressure is low when the engine rotational speed is too small, the air flow speed decreases, low torque loss.
and to increase the number of sensors and a throttle valve so as to increase the design and production cost, maintenance more difficult, the difficulty of tuning of the engine is also increased.