Engine assembly having camshaft with non-magnetic journal
An engine assembly may include an engine structure, a camshaft, a timing wheel and a camshaft position sensor. The camshaft may be rotationally supported within the engine structure and may have a non-magnetic journal rotationally fixed thereto. The timing wheel may be rotationally fixed to the camshaft proximate the non-magnetic journal. The camshaft position sensor may be coupled to the engine structure and configured to determine the rotational position of the camshaft based on a magnetic impulse from the timing wheel.
1. An engine assembly comprising:
an engine structure;
a camshaft rotationally supported within the engine structure and having a non-magnetic journal rotationally fixed thereto;
a timing wheel rotationally fixed to the camshaft proximate the non-magnetic journal; and
a camshaft position sensor coupled to the engine structure and configured to determine the rotational position of the camshaft based on a magnetic impulse from the timing wheel.
2. The engine assembly of claim 1 , wherein the non-magnetic journal is formed from austenitic Hadfield steel.
3. The engine assembly of claim 1 , wherein the timing wheel is within 6 millimeters of the non-magnetic journal.
4. The engine assembly of claim 3 , wherein the timing wheel abuts the non-magnetic journal.
5. The engine assembly of claim 1 , further comprising a cam phaser coupled to the camshaft and configured to adjust the rotational position of the camshaft during engine operation.
6. The engine assembly of claim 5 , wherein the camshaft includes first and second lobes rotatable relative to one another during engine operation.
7. The engine assembly of claim 5 , wherein the timing wheel is located at an end of the camshaft proximate the cam phaser.
8. The engine assembly of claim 1 , wherein the camshaft includes first and second lobes rotatable relative to one another during engine operation.
9. The engine assembly of claim 1 , wherein the camshaft includes an additional journal axially spaced from the non-magnetic journal, the timing wheel being located axially between the non-magnetic journal and the additional journal.
10. The engine assembly of claim 9 , wherein the camshaft includes a cam lobe located axially between the non-magnetic journal and the additional journal.
11. A camshaft assembly comprising:
a first shaft;
a non-magnetic journal rotationally fixed to the first shaft; and
a magnetic timing wheel located on the first shaft proximate the non-magnetic journal.
12. The camshaft assembly of claim 11 , wherein the non-magnetic journal is formed from austenitic Hadfield steel.
13. The camshaft assembly of claim 11 , wherein the timing wheel is within 6 millimeters of the non-magnetic journal.
14. The camshaft assembly of claim 13 , wherein the timing wheel abuts the non-magnetic journal.
15. The camshaft assembly of claim 11 , further comprising a cam phaser coupled to the first shaft and configured to adjust the rotational position of the first shaft during engine operation.
16. The camshaft assembly of claim 15 , further comprising first and second lobes located on the first shaft and rotatable relative to one another during engine operation.
17. The camshaft assembly of claim 15 , wherein the timing wheel is located at an end of the camshaft proximate the cam phaser.
18. The camshaft assembly of claim 11 , further comprising first and second lobes located on the first shaft and rotatable relative to one another during engine operation.
19. The camshaft assembly of claim 11 , further comprising an additional journal axially spaced from the non-magnetic journal, the timing wheel being located axially between the non-magnetic journal and the additional journal.
20. The camshaft assembly of claim 11 , further comprising a cam lobe located axially between the non-magnetic journal and the additional journal.