# US 2014/0196974 A1 · Wheel loader > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196974 A1 - Document ID: US20140196974A1 - Status: Published application - Kind: A1 - Application number: 14/115,364 - Filed: 2013-04-26 - Published: 2014-07-17 - Earliest claimed: 2012-10-26 - Assignees: Komatsu Ltd. - Applicants: Komatsu Ltd. - Inventors: Daisuke Hayashi; Nobuo Matsuyama - Web page: https://patentgrep.com/patent/US20140196974A1 ## CPC - B60K 13/04: concerning exhaust - E02F 9/0833: {Improving access, e.g. for maintenance, steps for improving driver's access, handrails} - E02F 9/0841: {Articulated frame, i.e. having at least one pivot point between two travelling gear units (tractor-trailer combinations B62D53/00)} - E02F 9/0866: {Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment} - F01N 3/24: characterised by constructional aspects of converting apparatus (filtering in combination with catalytic reactors F01N3/035) - 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 - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - 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) ## Abstract A wheel loader includes a vehicle frame, an engine, an operating fluid tank, a stand, a rear support frame, and a base member. The engine is mounted on the vehicle frame. The operating fluid tank is disposed in front of the engine. The stand is fixed to the vehicle frame and supports the operating fluid tank. The rear support frame is disposed facing the stand with the engine interposed there-between and fixed to the vehicle frame. The base member is disposed above the engine and has one end fixed to an upper part of the stand and the other end fixed to an upper part of the rear support frame. A diesel particular filter, a nitrogen oxide reduction catalytic converter, and a connecting pipe are all mounted on the base member with the connecting pipe connecting the diesel particulate filtering device and the nitrogen oxide reduction catalytic converter. ## Claims ### Claim 1 A wheel loader comprising: a vehicle frame; an engine mounted on the vehicle frame; an operating fluid tank disposed in front of the engine; a stand fixed to the vehicle frame and supporting the operating fluid tank; a rear support frame disposed facing the stand with the engine interposed therebetween and fixed to the vehicle frame; a base member disposed above the engine and having one end fixed to an upper part of the stand and the other end fixed to an upper part of the rear support frame; and a diesel particulate filtering device, a nitrogen oxide reduction catalytic converter, and a connecting pipe, all mounted on the base member with the connecting pipe connecting the diesel particulate filtering device and the nitrogen oxide reduction catalytic converter. ### Claim 2 (depends on 1) The wheel loader according to claim 1, wherein the rear support frame includes left and right posts disposed facing each other in a crosswise direction of the vehicle an upper brace extending in the crosswise direction of the vehicle and having both ends thereof fixed to upper parts of the left and right posts, and a rear supporting part that is provided so as to project upward in a middle portion in the crosswise direction of the upper brace, and that supports a rear end part of the base member, a space for disposing members being secured above the upper brace to the left and right of the rear supporting part. ### Claim 3 (depends on 1) The wheel loader according to claim 1, further comprising: a pipe unit connected between an exhaust part of the engine and an exhaust gas inlet of the diesel particulate filtering device; and an adjusting mechanism for adjusting an assembly position of the pipe unit and the diesel particulate filtering device mounted on the base member, the base member being removable from the stand and from the rear support frame. ### Claim 4 (depends on 3) The wheel loader according to claim 3, wherein the pipe unit includes an upstream side pipe having an exhaust upstream side end part coupled to the exhaust part of the engine, and an exhaust downstream side that extends rearward from the exhaust upstream side end part and is formed to bend upward so that an end part of the exhaust downstream side opens upward, and a downstream side pipe having a first pipe section that is connected to the exhaust gas inlet of the diesel particulate filtering device, and a second pipe section having a certain angle with respect to the first pipe section and coupled to a rear end surface of the upstream side pipe. ### Claim 5 (depends on 4) The wheel loader according to claim 4, wherein the upstream side pipe has a flexible pipe section. ### Claim 6 (depends on 2) The wheel loader according to claim 2, wherein the stand includes a mounting surface on which the operating fluid tank is mounted, and a front supporting part that projects upward in the middle portion in the crosswise direction of the vehicle at a rear end part of the mounting surface and that supports the base member, the diesel particulate filtering device and the nitrogen oxide reduction catalytic converter are disposed in a row, and one of the diesel particulate filtering device and the nitrogen oxide reduction catalytic converter is supported on a front end part of the base member, and the other of the diesel particulate filtering device and the nitrogen oxide reduction catalytic converter is supported on the rear end part of the base member. ### Claim 7 (depends on 6) The wheel loader according to claim 6, wherein the exhaust gas inlet of the diesel particulate filtering device is formed to face toward rearward, and the pipe unit is disposed so as to pass through the space for disposing members. ### Claim 8 (depends on 2) The wheel loader according to claim 2, further comprising a shim for adjusting a disposed height between the base member and the rear supporting part of the rear support frame. ### Claim 9 (depends on 8) The wheel loader according to claim 8, wherein the base member has an opening for avoiding obstruction with a fixing member for fixing the shim to the rear supporting part.