Camshaft position sensing for dual overhead cam variable valve timing engines

A camshaft position sensing device for a dual overhead cam variable valve timing engine having a pair of camshafts mounted parallel to one another, the camshaft position sensing device comprising:

• a target wheel on each camshaft and adapted to rotate in unison therewith;
• two sensing elements, one for each target wheel, facing in opposite directions and disposed between the camshafts on the centerline of the camshafts;
• and
• a common housing for the two sensing elements, the common housing positioning each sensing element so chat it is in a reading position with respect to one of the target wheels, whereby both target wheels are read by the two sensing elements.

A camshaft position sensing device for a dual overhead cam variable valve timing engine having a pair of camshafts mounted parallel to one another, the camshaft position sensing device comprising:

• a target wheel mounted on each camshaft and adapted to rotate in unison therewith;
• two sensing elements, one for each target wheel;
• a common housing positioned between the two camshafts for housing the two sensing elements, the common housing positioning each sensing element so that it is in a reading position with respect to one of the target wheels, whereby both target wheels are read by the two sensing elements;
• two oppositely facing ends on the common housing, the sensing elements being located on each in the two oppositely facing ends of the common housing and along a plane containing the axis of rotation of each camshaft;
• a common power lead for the two sensing elements;
• a common ground lead for the two sensing elements;
• and
• separate signal leads for the two sensing elements, whereby the two sensing elements require only four leads to read the position of the two camshafts.