Horiba, Ltd.

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Horiba, Ltr.

Tokihiro Tsukamoto

Nobutaka Kihara

Koichi Matsumoto

Hiroji Kohsaka

Shigeo Nakamura

Masato Yoshida

Yoshiaki Danno

Kazuhide Togai

Hiromitsu Ando

Ichiro Asano

Jun Takemura

Shinji Noguchi

Kennosuke Kojima

Tetsuro Ishida

Daisuke Sanbayashi

Kazuhiro Shiraishi

Takeshi Shimada

Eiichi Koujina

The present invention provides a method for easily measuring nitrogen oxide concentration of an engine vehicle emission. The method can measure vehicle emission from an engine of a vehicle in travel with high precision even in regions other than the lean region, that is, regions from the stoichiometrical region to the rich region by using a NOsensor exclusively used for the lean region. The present invention has an arrangement in which a NOsensor that is exclusively used for the lean region is installed in an exhaust pipeconnected to the engine. Air (secondary air) A is introduced into the exhaust pipeon the upstream side of the NOsensorso that the NOsensoris allowed to measure the concentration of NOin the engine vehicle emission diluted by air A. Thus, the NOconcentration in the engine vehicle emission before dilution G is obtained by using the measured value of the NOconcentration after dilution and by using a dilution ratio.

Method for easily measuring nitrogen oxide concentration of an engine vehicle emission

The present invention provides a method for easily measuring a brake mean effective pressure of a running vehicle. An air flow sensor, a &#x3bb; sensor and a data collecting apparatus are mounted to the vehicle. A running speed and engine speed from the vehicle while actually running on a road surface, and output of the air flow sensor an the &#x3bb; sensor are inputted to the data collecting apparatus. Specific fuel consumption is obtained from an intake air amount and ratio of excessive air in exhaust gas. Output of an engine is obtained from a relation between the specific fuel consumption and the engine speed.

System and method for measuring brake mean effective pressure in a running vehicle

The present invention provides a simple method of measuring NO in a running vehicle. While running on an actual road surface, the weight of NO emitted from an engine of the running vehicle can be found more simply and accurately. The present invention comprises mounting a NO analyzer, an air-fuel ratio sensor, and a data collection device on a vehicle, allowing the vehicle to run on the actual road surface, introducing the exhaust gas emitted while running on the actual road surface to a NO analyzer to determine the concentration of NO contained in the exhaust gas, determining a flow rate of the exhaust gas by using a fuel injection quantity based on a fuel injection pulse output from an electronic control unit mounted on the vehicle and an output from the air-fuel ratio sensor, and determining the weight of NO emitted from the engine from the flow rate of the exhaust gas and the concentration of NO .

Simple method of measuring nitrogen oxide in running vehicles

The present invention provides a method for easily measuring a brake mean effective pressure of a running vehicle. An air flow sensor, a &lgr; sensor and a data collecting apparatus are mounted to the vehicle. A running speed and engine speed from the vehicle while actually running on a road surface, and output of the air flow sensor an the &lgr; sensor are inputted to the data collecting apparatus. Specific fuel consumption is obtained from an intake air amount and ratio of excessive air in exhaust gas. Output of an engine is obtained from a relation between the specific fuel consumption and the engine speed.

Easy method for measuring brake mean effective pressure in a running vehicle

A method of controlling a robot for testing of a motorcar by the simulated driving thereof, as on a chassis dynamometer. The robot is capable of detecting shifted operating quantities of actuators of the robot to correct the detected shifted quantities, whereby surely achieving operations of pedals and the like of the motorcar by the actuators. In the case where the actuators of the robot are shifted in position during a test driving of the motorcar, these positional shifts are automatically sensed and compensated for during the simulated driving of the motorcar, and the test need not be discontinued or interrupted.

Method and apparatus for controlling a robot to simulate driving of a

An improved sample cell for use in a gas analyzer has a sample body with a measuring optical path extending traverse to the cell body. A sample gas inlet port is positioned at one end of the cell body, and a sample gas outlet port is positioned at the other end of the cell body. Porous plates can extend across the cell body, and appropriately-dimensioned apertures in the porous plates can ensure a consistent flow path of gas across the optical path without any stagnated flow patterns.

Sample cell for improved gas flow in a gas analyzer

A drain separator in a gas analyzer is provided to rapidly remove drain or condensate from a gas flow by creating a rotary motion in the gas flow prior to introducing it into a separating chamber. In an exemplary embodiment, separating chamber 2, formed as a downwardly divergent conical space, connects with gas-inlet passage 6 at its upper end and an exhaust gas-outlet passage 3 at the periphery of its base. A sample gas-outlet passage 8 is disposed within separating chamber 2 in a coaxially aligned, vertically spaced opposing relationship to gas-inlet passage 6. Rotation of the gas flow may be accomplished by a vane 7, disposed within gas-inlet passage 6. Upon introduction of the rotating gas flow into separating chamber 2, the pressure on the flow is reduced causing the drain to condense and become distributed about the circumference of the low pressure gas flow. A portion of the gas from the center of the low pressure gas flow containing little condensate then passes through sample gas-inlet passage 8 to a gas analyzer. At the same time the majority of the condensate and waste gas is removed from separating chamber 2 through exhaust gas-outlet passage 3.

Drain separator in gas analyzer

A method and apparatus for measuring particulates in a combustion gas is accomplished by dividing the combustion gas into a first and second sample gas. The first sample gas is filtered to remove particulates to create a reference gas sample. A combustion furnace can heat both the reference gas sample and the sample gas to oxidize any particulates in the sample gas. A gas analyzer that is connected to the furnace can detect the gas components in, respectively, the reference gas sample and the sample gas, and a comparison of the detected results can determine the concentration of particulates.

Method and apparatus for real time measurement of particulate matter in

A method and device for determining and controlling the condition of a spark ignition internal combustion engine involves detecting a physical value of combustion varying in association with combustion in the combustion chamber, then calculating the heat evolution rate from the physical value, and then determining the adjusting the combustion condition in dependence on the falling area of the heat evolution rate.

Growing community of inventors

Kyoto, Japan

Tokihiro Tsukamoto