Sleeved rocker shaft for type iii heavy duty valve train
AssigneeEaton Intelligent Power Limited
InventorsRamy Rezkalla, Andrei Radulescu, Ryan Krieger
Life of this patent
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Abstract
A rocker shaft assembly configured to support a rocker arm and deliver oil to the rocker arm and related method of making is provided. The rocker shaft assembly includes a core shaft and a sleeve. The core shaft has a core body including a main oil supply channel formed thereon. The sleeve has passages formed thereon. The sleeve is disposed around the core shaft. The main oil supply channel aligns with at least one of the passages on the sleeve. The main oil supply is milled into the core shaft.
Claims19
A rocker shaft assembly configured to support a rocker arm and deliver oil to the rocker arm, the rocker shaft assembly comprising:
- a core shaft having a core body including a main oil supply channel formed thereon;
- and
- a sleeve having passages formed thereon;
- wherein the sleeve is disposed around the core shaft, the main oil supply channel aligning with at least one passage of the passages on the sleeve.
A method of making a rocker shaft assembly configured to support a rocker arm and deliver oil to the rocker arm, the method comprising:
- providing a core shaft having a core body;
- providing a sleeve;
- milling a main oil supply channel onto the core body;
- milling a brake oil supply channel onto the core body;
- milling one of a variable lift (VVL) and cylinder deactivation (CDA) supply channel onto the core body;
- and
- press-fitting the sleeve around the core shaft.
A rocker shaft assembly configured to support a rocker arm and deliver oil to the rocker arm, the rocker shaft assembly comprising:
- a tube assembly having a main supply tube and at least one of a brake oil supply tube, a variable lift (VVL) tube and a cylinder deactivation (CDA) tube;
- and
- a sleeve having passages formed thereon;
- wherein the sleeve is disposed around the tube assembly, wherein the passages intersect the main supply tube and the at least one of the brake oil supply tube, the VVL tube and the CDA tube.
A method of making a rocker shaft assembly configured to support a rocker arm and deliver oil to the rocker arm, the method comprising:
- stacking a main supply tube, a brake oil supply tube and one of a variable lift (VVL) tube and a cylinder deactivation (CDA) tube onto at least one separator plate to create a tube subassembly;
- inserting the tube subassembly into a sleeve, the sleeve having passages formed thereon;
- overmolding the tube subassembly within the tube;
- and
- drilling holes into the main supply tube, the brake oil supply tube and one of the WL and CDA tube.
Dependencies are inferred from the claim text.