Komatsu Corporation

Sanyo Electric Co., Ltd.

Semiconductor Components Industries, LLC

Sanyo Semiconductor Co., Ltd.

Kozo Okuda

Takeo Inoue

Hideki Ohashi

Shouhei Nagasaka

Jin Yogita

Kiichirou Kouno

Thi Hong Thu Nguyen

Minato Tomuro

Tsuyoshi Kobayashi

Tadashi Iijima

Godo Ozawa

Yasuyuki Onodera

Kenji Ohiwa

Yuusuke Kondou

Muneo Harada

Hitoshi Hongo

Naoto Ikeda

Kouji Hoshi

Kazuyoshi Morimoto

Yukinori Maeda

Hideo Oguri

Hideyuki Ohi

Mika Kirimoto

Naoto Nakamura

Eiji Morinaga

Masatoshi Uchimaru

Hiroki Onishi

Shinya Furuhata

Yoshitsugu Shigehisa

Osamu Okamoto

Ken Itou

Takuya Homma

Hiroto Shinomiya

Kenji Morimoto

Keiji Yanagihara

Hiroyuki Hirai

An oil cooler is disposed on the vehicle body and includes a fan that creates an air flow and a housing that houses the fan. The housing has a first side surface which is disposed on the upstream side of the air flow, a second side surface which is disposed on the downstream side of the air flow, and a third side surface which is connected to the first side surface and the second side surface. The vehicle body is provided with a first passage which is disposed on the side of the first side surface, a second passage which is disposed on the side of the second side surface and on an outer edge of the vehicle body in a top view, and a third passage which is disposed on the side of the third side surface and is connected to the first passage and the second passage.

Work machine cooling unit fan housing

An acoustic echo canceller (AEC) uses a simulated echo from an adaptive filter to cancel an actual echo from a real environment. The echo cancellation is optimal when the adaptive filter response accurately matches the environment response. This can be achieved by changing coefficients of the filter in a step-wise fashion until the filter is converged on a configuration that provides optimal results. The convergence of the filter can be negatively affected by interference due to a double talk event or by an event in which the environment is changed. The disclosed AEC is configured to respond to these disruptive events by adjusting a step-size of the adaptive algorithm used to change the coefficients.

Echo canceller with variable step-size control

Echo reduction. At least one example embodiment is a method including producing, by a loudspeaker, acoustic waves based on a far-microphone signal; receiving, at a local microphone, an echo based on the acoustic waves, and receiving acoustic waves generated locally, the receiving creates a local-microphone signal; producing an estimated-echo signal based on the far-microphone signal and a current step-size parameter; summing the local-microphone signal and the estimated echo signal to produce a resultant signal having reduced echo in relation to the local-microphone signal; and controlling the current step-size parameter. The controlling current step size may include: calculating a convergence value based on a cross-correlation of the local-microphone signal and the resultant signal; and updating the current step-size parameter based on the convergence value.

Systems and methods of echo reduction

Various embodiments of the present technology comprise a method and apparatus for a microphone system. Various embodiments of the present technology may comprise a first microphone connected to a first high pass filter and a second microphone connected to a second high pass filter. The microphone system may further comprise a frequency controller configured to selectively activate the first high pass filter and the second high pass filter according to detected wind noise. The first and second high pass filters may be arranged to filter sound data from the first and second microphone prior to processing the sound data using beamforming.

Methods and apparatus for a microphone system

Various embodiments of the present technology comprise a method and system for wireless audio. In various embodiments, the system comprises a set of wirelessly connected ear buds, each ear bud suitable for placing in a human ear canal. Each ear bud comprises a microphone, an asynchronous sampling rate converter, a timer, and an audio clock. One ear bud from the set further comprises a control circuit and a synchronizer to synchronize the input of sound signals captured by the microphones and/or synchronize the processing and output of the sound signals.

Methods and systems for wireless audio

A work vehicle having a plurality of working modes allowing working in accordance with a load state includes an engine, an exhaust gas purification apparatus, a reducing agent tank, a state determination portion, and an engine control unit. The exhaust gas purification apparatus purifies a nitrogen oxide in an exhaust gas. The reducing agent tank stores a reducing agent. The state determination portion determines a state of the reducing agent. The engine control unit controls output of the engine with the use of a restricted-operation engine output torque curve in which horsepower output from the engine is lower than horsepower output from the engine at the time when each of the plurality of working modes is selected, when a state of the reducing agent is equal to or lower than a reference value.

Work vehicle

A work vehicle includes a vehicle body, a guiding pipe, a first heating section, and a second heating section. The vehicle body has a partition wall that partitions a space in an inner section into a first region and a second region. The guiding pipe is configured to guide a reducing agent. The guiding pipe has a first pipe section and a second pipe section. The first pipe section is positioned inside the first region. The second pipe section is positioned in the second region. The first heating section heats the first pipe section. The second heating section heats the second pipe section and adjusts the temperature independently from the first heating section.

A filter remover removes a cylindrical filter element housed in a housing through an opening provided in the housing. The filter remover includes: an attachment portion provided with a screw to be screwed onto the opening; an insert portion that includes a base end integrated with the attachment portion and a tip end in a form of a free end, that is elastically deformable in a radial direction orthogonal to an axial direction of the filter element in conjunction with a movement in the axial direction caused when the attachment portion is screwed, and that is inserted through the opening into a center hole provided in the filter element as the attachment portion is screwed; and an engaging portion that is provided at the tip end and that is engaged with the filter element after the attachment portion is moved for a predetermined amount when the attachment portion is screwed.

Filter remover

An engine unit mounted to a vehicle frame, the engine unit includes: an engine; an engine support mechanism to be coupled to the vehicle frame, with at least one vibration absorbing mechanism disposed on each of both sides of the engine in an orthogonal direction to a crankshaft of the engine, to support the engine; an aftertreatment device to purify exhaust gas emitted from the engine; a base bracket provided to the engine support mechanism; and an upper bracket detachably fixed and mounted to the base bracket, the upper bracket supporting the aftertreatment device.

Engine support mechanism with aftertreatment device

A hydraulic excavator includes an engine, a rotating frame, a vehicle body frame, a diesel particulate filtering device, a selective catalytic reduction device and a connecting pipe. The rotating frame supports the engine. The vehicle body frame is provided in a standing manner on the rotating frame, and includes a plurality of column members. The a diesel particulate filtering device and the selective catalytic reduction device process exhaust from the engine, and are supported by the vehicle body frame. The connecting pipe has an extendable bellows part in at least a portion. The connecting pipe connects the engine and the diesel particulate filtering device. The bellows part is located further away from the engine as the bellows part inclines further downward.

Hydraulic excavator

A working vehicle includes a vehicle, an engine, an exhaust treatment apparatus, a connecting pipe, a reducing agent injection apparatus, a reducing agent pump and a guiding pipe guiding reducing agent from the pump to the injection apparatus. The engine, exhaust treatment apparatus, connecting pipe, and reducing agent injection apparatus are arranged inside an engine room of the vehicle body. The engine has a crank shaft, and intake and exhaust manifolds arranged on first and second direction sides of the crank shaft, respectively. A first accommodating space is positioned on a first direction side of the engine room. A reducing agent pump is arranged inside the first accommodating space. A guiding pipe is arranged so as to pass inside the engine room on the first direction side with regard to the crank shaft.

A reducing agent tank includes a tank body storing reducing agent and a cylindrical gauge member visually indicating a storage amount of the reducing agent inside the tank body. The gauge member is in communication with an inside of the tank body. The tank body has a replenishment port to replenish the reducing agent. The gauge member is provided on a first wall surface of a plurality of wall surfaces defining the tank body. The gauge member is provided in a slanted manner relative to a bottom plate of the tank body. The replenishing port and the gauge member are disposed in a row along a direction that extends along the first wall surface as seen in a plan view.

Reducing agent tank and work vehicle

A work vehicle includes a reducing agent tank, a battery, a reducing agent tank mounting member, a battery cover and a first guide member. The battery and the tank are positioned in a row. The mounting member has a bottom plate, and a partition plate extending upward from the bottom plate between the tank and the battery. The tank is mounted on the bottom plate. The battery cover has an upper plate above the battery, and a side plate extending downward from a side of the upper plate between the tank and the battery. The first guide member extends from the side plate toward the tank and slopes downward. Preferably, a first end of a second guide member disposed below the first guide member is positioned closer to the battery than a distal end of the first guide member, with the second guide member sloping downward toward the tank.

Work vehicle having reducing agent tank, battery and partition plate positioned between tank and battery

An echo prevention circuit comprises an input terminal to which a first input signal is input; a first FIR filter into which the first input signal is input through the input terminal; a second FIR filter into which the first input signal is input at the same time as into the first FIR filter; an input/output terminal to which an output signal of the first FIR filter is output or a second input signal is input; a subtracter that subtracts an output signal of the second FIR filter from a combined signal of the output signal of the first FIR filter and the second input signal; and an output terminal to which an output signal of the subtracter is output. The first and the second FIR filters have such filter coefficients that the output signal through the output terminal has only the output signal from the first FIR filter removed.

Echo prevention circuit having signal subtracter feature

A speech signal processing apparatus includes a control signal output unit configured to receive as an input signal either one of a first speech signal corresponding to a sound uttered by a user and a second speech signal corresponding to a sound output from an eardrum of the user when the user utters a sound, and output a control signal corresponding to a noise level of the input signal, and a speech signal output unit configured to output either one of the first speech signal and the second speech signal according to the control signal.

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Hirakata, Japan

Kozo Okuda