Patent ID: 9228547
Filing Date: 2016-01-05
CPC Classification: F02B,F02D,F02M,Y02T

Claim Text:
1. An apparatus for generating engine intake air turbulence, comprising: a turbulence generator valve which is arranged in an intake air passage, and generates turbulence in a cylinder of an engine, and has a rotatable shaft supported on a fixing member; an electric actuator having an electric motor which rotates the rotatable shaft by generating rotating torque in response to electric power supply; and a cancel spring having one end supported by the fixing member and the other end engaged with the turbulence generator valve or the electric actuator, which applies force to the turbulence generator valve, wherein the turbulence generator valve receives an intake flow torque TA which is a rotating torque applied to the turbulence generator valve by flow of intake air, and wherein the electric actuator requires a reverse transmission torque TB which is a rotating torque necessary to rotate the electric motor in the electric actuator when the electric motor is not activated, and wherein the cancel spring applies the force to the turbulence generator valve in a reverse direction to the intake flow torque TA to apply a cancel torque TC which is a rotating torque applied to the turbulence generator valve, and wherein the cancel torque TC is set so that a total torque TD including the intake flow torque TA and the cancel torque TC applied to the turbulence generator valve is set smaller than the reverse transmission torque TB, the cancel torque TC being used to satisfy: |TA+TC|<|TB|, wherein the turbulence generator valve is configured to maintain a valve opening degree in any valve opening degree from full close to full open without activating the electric motor.