US 12,012,884 B1Granted

Engine with exhaust heater

AssigneeRobert Bosch GmbH

InventorsMischa Zeller, Christian Disch, Brent Keppy, Ryan Neal O'Donnell

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Abstract

An internal combustion engine including a first and a second manifold coupled to exhaust ports of a first and a second plurality of cylinders to receive exhaust gas therefrom. The engine includes a first and a second pipe configured to receive the exhaust gas from the manifolds. The engine includes a collector including a first and second inlet coupled to the pipes and an outlet configured to receive a merged flow of the exhaust gas from the first and second pipe. The engine includes a catalyst configured to receive a merged flow of the exhaust gas from the outlet and treats the exhaust gas and a heater assembly configured to selectively supply heat energy to the exhaust gas from the first pipe and the second pipe. The heater assembly includes a connecting portion coupled to the collector.

Claims19

Dependent claims

An internal combustion engine comprising:

a first manifold coupled to exhaust ports of a first plurality of cylinders to receive exhaust gas therefrom;
a second manifold coupled to exhaust ports of a second plurality of cylinders to receive exhaust gas therefrom;
a first pipe configured to receive the exhaust gas from the first manifold;
a second pipe configured to receive the exhaust gas from the second manifold;
a collector including a first inlet coupled to the first pipe, a second inlet coupled to the second pipe, and an outlet, the outlet configured to receive a merged flow of the exhaust gas from the first pipe and the second pipe;
a catalyst configured to receive a merged flow of the exhaust gas from the outlet of the collector and configured to treat the exhaust gas from the first pipe and the second pipe;
and
a heater assembly configured to selectively supply heat energy to the exhaust gas from the first pipe and the second pipe, the heater assembly including a connecting portion coupled to the collector,
wherein the first inlet and the second inlet are angled apart to define a space,
wherein the collector includes a third inlet in the space, the third inlet configured to receive the connecting portion.

7 more elements

An internal combustion engine comprising:

a first bank and a second bank disposed on opposing sides of a crankshaft axis;
a first pipe coupled to an exhaust port of a first cylinder on the first bank to receive exhaust gas therefrom;
a second pipe coupled to exhaust port of a second cylinder on the second bank to receive exhaust gas therefrom;
a collector including a first inlet coupled to the first pipe, a second inlet coupled to the second pipe, and an outlet, the outlet configured to receive a merged flow of the exhaust gas from the first pipe and the second pipe;
a catalyst configured to receive a merged flow of the exhaust gas from the outlet of the collector and configured to treat the exhaust gas from the first pipe and second pipe;
and
a heater assembly configured to selectively supply heat energy to the exhaust gas from the first pipe and the second pipe, the heater assembly including a fuel burning heater and a connecting portion, the connecting portion coupled to the collector and disposed between the first inlet and the second inlet,
wherein the first inlet and the second inlet are angled apart to define a space,
wherein the collector includes a third inlet in the space, the third inlet configured to receive the connecting portion.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/305,900Filed 24 Apr 2023
Granted: 18 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

F01N 3/2033
Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating: using a fuel burner or introducing fuel into exhaust duct
F01N 13/107
Of exhaust manifolds: more than one exhaust manifold or exhaust collector
F01N 3/101
By thermal or catalytic conversion of noxious components of exhaust: three-way catalysts
F01N 3/24
By thermal or catalytic conversion of noxious components of exhaust: characterised by constructional aspects of converting apparatus