Throttle valve assembly

An engine air induction control system for a motor vehicle, comprising:

• an air inlet flow path to an engine including a throttle valve assembly including;
• a throttle body defining offset inlet and outlet air flow passages connected via a throttle passage providing an adjustable air flow area;
• a wedge shaped valve member slidingly mounted in the throttle body to vary the air flow area of the throttle passage;
• and
• an actuator mechanism to move the wedge shaped valve member towards and away from the inlet air flow passage to vary the air flow area of the throttle passage;
• wherein the inlet air flow passage extends along a first longitudinal axis, the outlet air flow passage extends along a second longitudinal axis arranged parallel to but offset from the first longitudinal axis and the actuator mechanism is operable to slide the wedge shaped valve member between open throttle and closed throttle positions along a third longitudinal axis arranged parallel to the first and second longitudinal axes;
• an electronic controller;
• an accelerator pedal position sensor associated with an accelerator pedal of the motor vehicle to provide a driver torque demand input to the electronic controller;
• and
• an electronically controllable actuator forming part of the actuator mechanism of the throttle valve assembly operably connected to the electronic controller.

A throttle valve assembly, comprising:

• a throttle body including radially offset inlet and outlet air flow passages connected via a throttle passage with an adjustable air flow area;
• a wedge shaped valve member slidingly mounted in the throttle body to vary the air flow area of the throttle passage;
• and
• an actuator mechanism moving the wedge shaped valve member towards and away from the inlet air flow passage.