# US 8,739,918 B2 · Exhaust systems for vehicles

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- Number: US 8,739,918 B2
- Document ID: US8739918B2
- Status: Granted
- Kind: B2
- Application number: 13/139,398
- Filed: 2009-12-07
- Published: 2011-11-24
- Granted: 2014-06-03
- Earliest claimed: 2008-12-19
- Assignees: AGCO Corporation
- Applicants: Gerhard Mariner; Andreas Kleinhenz; Guido Nagele; Hans Heinle; Robert Heisler
- Inventors: Gerhard Mariner; Andreas Kleinhenz; Guido Nagele; Hans Heinle; Robert Heisler
- Web page: https://patentgrep.com/patent/US8739918B2

## CPC

- F01N 13/08: Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)}
- F01N 13/0097: {the purifying devices are arranged in a single housing}
- F01N 3/021: by means of filters
- F01N 3/035: with catalytic reactors
- F01N 3/2066: {Selective catalytic reduction [SCR]}
- F01N 13/141: {Double-walled exhaust pipes or housings}
- F01N 2470/18: the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
- F01N 2560/026: for measuring or detecting NOx
- F01N 2560/06: the means being a temperature sensor
- F01N 2590/08: for heavy duty applications, e.g. trucks, buses, tractors, locomotives
- F01N 2610/02: the substance being ammonia or urea
- Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

An exhaust system for an agricultural and/or industrial tractor (10) having an internal combustion engine (11) located in an engine compartment covered by an engine hood (11a). The system includes an exhaust gas treatment unit (16) located inside the engine compartment hood and having a main chamber (18) fed by an inlet pipe (15) which receives exhaust gases from the engine and an outlet pipe (17) which passes treated gases into a final portion (14a,14b) of the exhaust system. The inlet and outlet pipes (15,17) are non-aligned and extending alongside the main chamber (18) in opposite directions to reduce the overall length of the treatment unit. The treatment unit (16) may be installed above the engine (11) with the exhaust gases passing through the unit either generally normal or parallel to the direction of driving (D) of the tractor.

## Claims

### Claim 1

An exhaust system for an agricultural or industrial tractor having an internal combustion engine located in an engine compartment covered by an engine hood, the system including an exhaust gas treatment unit located inside the engine compartment hood and having a main chamber fed by an inlet pipe which receives exhaust gases from the engine and an outlet pipe which passes treated gases into a final portion of the exhaust, the exhaust treatment unit being installed above the engine and orientated generally transverse relative to the tractor so that the exhaust gases pass through the main chamber of the unit in a direction generally normal to the driving direction of the tractor and the inlet and outlet pipes are non-aligned and extend alongside the main chamber in opposite directions to reduce the overall length of the treatment unit.

### Claim 2 (depends on 1)

An exhaust system according to claim 1 in which the gas treatment unit is provided with one or more of a urea injector, an exhaust gas temperature sensor and a NOx sensor to simplify installation of the unit.

### Claim 3 (depends on 1)

An exhaust system according to claim 1 in which the end of the main chamber of the treatment unit is of a double walled construction to provide heat installation for other components under the hood.

### Claim 4 (depends on 1)

An exhaust system according to claim 1 in which one or both of the inlet and exhaust pipes is of a double walled construction to provide heat installation for other components under the hood.

### Claim 5 (depends on 1)

An exhaust system according to claim 1 in which the main chamber of the exhaust gas treatment unit includes one or more of the following components, namely an oxidation catalyser, an NOx catalyser and an NOx, HC, NH3 absorber arranged in series.

### Claim 6 (depends on 1)

An exhaust gas treatment unit for use in the exhaust system of claim 1 in which the treatment unit has a main chamber fed by an inlet pipe which receives exhaust gases from the engine and an outlet pipe which passes treated gases into a final portion of the exhaust system, the inlet and outlet pipes being non-aligned and extending alongside the main chamber in opposite directions to reduce the overall length of the treatment unit.