# US 2017/0284059 A1 · Work machine

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- Number: US 2017/0284059 A1
- Document ID: US20170284059A1
- Status: Published application
- Kind: A1
- Application number: 15/508,205
- Filed: 2015-12-25
- Published: 2017-10-05
- Earliest claimed: 2014-12-26
- Assignees: KCM Corporation
- Applicants: KCM Corporation
- Inventors: Takashi TAKEYAMA; Keigo KIKUCHI; Katsutaka HARA; Masashi YAMASHITA
- Web page: https://patentgrep.com/patent/US20170284059A1

## CPC

- E02F 9/0866: {Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment}
- B60K 13/02: concerning intake
- B60K 13/04: concerning exhaust
- E02F 9/00: Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00 (laying-out or take-up devices for trailing electric cables B66C)
- E02F 9/0891: {Lids or bonnets or doors or details thereof (doors for cabins E02F9/163 takes precedence; for motor vehicles B62D25/10)}
- F01N 3/103: {Oxidation catalysts for HC and CO only}
- F01N 3/206: {Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents}
- F01N 3/2066: {Selective catalytic reduction [SCR]}
- F01N 3/28: Construction of catalytic reactors
- F02M 35/042: {combined with other devices, e.g. heaters (F02M35/021, F02M35/06, F02M35/14 take precedence); for use other than engine air intake cleaning, e.g. air intake filters arranged in the fuel vapour recovery system}
- E02F 3/34: with bucket-arms {, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms (with a single arm E02F3/283)} directly pivoted on the frames of tractors or self-propelled machines
- F01N 2490/06: the gases flowing longitudinally from inlet to outlet in opposite directions
- F01N 2570/10: Carbon or carbon oxides
- F01N 2570/12: Hydrocarbons
- F01N 2570/14: Nitrogen oxides
- 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
- Y02T 10/12: Improving ICE efficiencies
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- 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)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An exhaust system of a work machine is equipped with a first exhaust system, a second exhaust system, and a third exhaust system. The first exhaust system and the third exhaust system are arranged to be in parallel with respective one ends directed in the same direction. In a plan view, the second exhaust system is arranged with the other end side directed in the same direction as the one end sides of the first exhaust system and the third exhaust system to be in parallel with the first exhaust system and the third exhaust system between the first exhaust system and the third exhaust system and, in a side view, is arranged above the first exhaust system and the third exhaust system.

## Claims

### Claim 1

A work machine comprising:
an engine for the work machine; and
an exhaust system for treating exhaust gas from the engine;
wherein the exhaust system includes:
a first exhaust system taking an almost cylindrical shape and including a first inflow port for the exhaust gas on one end side and a first discharge port for the exhaust gas on the other end side;
a second exhaust system taking an almost cylindrical shape and including a second inflow port for the exhaust gas from the first exhaust system on one end side and a second discharge port for the exhaust gas on the other end side, the second exhaust system being connected on a downstream side of the first exhaust system; and
a third exhaust system taking an almost cylindrical shape and including a third inflow port for the exhaust gas from the second exhaust system on one end side and a third discharge port for the exhaust gas on the other end side, the third exhaust system being connected on a downstream side of the second exhaust system,
the first exhaust system and the third exhaust system are arranged to be in parallel with the respective one ends directed in the same direction,
in a plan view, the second exhaust system is arranged with the other end side directed in the same direction as the respective one end sides of the first exhaust system and the third exhaust system to be in parallel with the first exhaust system and the third exhaust system between the first exhaust system and the third exhaust system, the second exhaust system in a side view being arranged above the first exhaust system and the third exhaust system, and
the exhaust system is attached to the work machine so that in a plan view, the third exhaust port comes close to a center line extending in a front-rear direction of the work machine with the extending direction of the third exhaust system slanted relative to the extending direction of the center line.

### Claim 2 (depends on 1)

The machine according to claim 1, further comprising:
an air cleaner for purifying intake air; and
a bulkhead separating an engine room in which the engine is arranged, from a cooler chamber provided behind the engine room;
wherein the air cleaner is arranged in the cooler chamber, and
the exhaust system is attached to the work machine in the state that the other end with the third exhaust port is directed rearward of the work machine.

### Claim 3 (depends on 2)

The work machine according to claim 2, further comprising:
an engine hood covering an upper portion of the engine room in which the engine is arranged;
a cooler housing cover covering an upper portion of the cooler chamber;
an exhaust pipe protruding from the upper portion of the engine hood for discharging the exhaust gas from the third discharge port outside; and
an intake pipe protruding from the upper portion of the cooler housing cover for taking intake air from outside through the air cleaner,
wherein as viewed from the operator's cabin of the work machine, the exhaust pipe and the intake pipe overlaps each other at least partly.

### Claim 4 (depends on 1)

The work machine according to claim 1, further comprising
a bracket fixing the exhaust system in the engine room in which the engine is arranged,
wherein the bracket takes a mountain shape having right and left slopes that slant to become high from the right and left to a center of the work machine,
the first exhaust system is fixed to any one of the right and left slopes, and
the third exhaust system is fixed to the other of the right and left slopes.