Exhaust manifold system and collar coolant jacket
First Claim
Patent Images
1. An exhaust manifold system comprising:
- a plurality of runners extending perpendicular to a longitudinal manifold axis;
an outlet passage distal from the runners and terminating with a manifold flange; and
a coolant jacket not adjacent the runners including;
a coolant inlet and outlet for coupling to a coolant system; and
a collar coupling the coolant inlet and outlet, the collar adjacent and surrounding the outlet passage, adjacent the manifold flange, and decoupled from the runners, the collar including only a first flow path and a second flow path defined by an interior of the collar, the first and second flow paths collectively surrounding a circumference of the outlet passage, the collar including a smooth interior surface, the first flow path including a first collar profile, the second flow path including a second collar profile and the coolant inlet having an inlet profile, a cross-sectional area of the first and second collar profiles less than a cross-sectional area of the inlet profile, where the coolant jacket further includes a diverter rib extending into an interior of the coolant jacket collar, the diverter rib extending toward the coolant outlet where the first and second flow paths meet.
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Abstract
An exhaust manifold of a turbocharged engine includes a collar coolant jacket to maintain component temperatures within acceptable limits. The collar coolant jacket is specifically located around the exhaust outlet of the manifold.
38 Citations
16 Claims
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1. An exhaust manifold system comprising:
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a plurality of runners extending perpendicular to a longitudinal manifold axis; an outlet passage distal from the runners and terminating with a manifold flange; and a coolant jacket not adjacent the runners including; a coolant inlet and outlet for coupling to a coolant system; and a collar coupling the coolant inlet and outlet, the collar adjacent and surrounding the outlet passage, adjacent the manifold flange, and decoupled from the runners, the collar including only a first flow path and a second flow path defined by an interior of the collar, the first and second flow paths collectively surrounding a circumference of the outlet passage, the collar including a smooth interior surface, the first flow path including a first collar profile, the second flow path including a second collar profile and the coolant inlet having an inlet profile, a cross-sectional area of the first and second collar profiles less than a cross-sectional area of the inlet profile, where the coolant jacket further includes a diverter rib extending into an interior of the coolant jacket collar, the diverter rib extending toward the coolant outlet where the first and second flow paths meet. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A cooled exhaust manifold system comprising:
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a plurality of inlets to runners extending perpendicular to a longitudinal manifold axis, the plurality of inlets to runners sharing a plane; an outlet passage distal from the runners and asymmetrically positioned at a first end of the cooled exhaust manifold system, the outlet passage extending out away from the plane of runners and the outlet passage extending parallel to the runners away from the inlets, and the outlet passage terminating with a manifold flange; and a coolant jacket not adjacent the plurality of inlets to runners including; a coolant inlet and a coolant outlet both for coupling to a coolant system; and a collar fluidically coupling the coolant inlet and outlet, the collar adjacent the outlet passage and the manifold flange and decoupled from the runners, a longitudinal section of the jacket extending parallel to the longitudinal axis, the longitudinal section directly coupled, via casting, to the collar and the coolant inlet, a length of the longitudinal section equal to, or less than, half the longitudinal length of the cooled exhaust manifold system. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification