Horiba, Ltd.

Masanobu Akita

Hiroshi Nakamura

Ichiro Asano

Yoshinori Otsuki

Masayuki Adachi

Masayoshi Shinohara

Takashi Matsuyama

Kaoru Okada

The present invention is intended to, at the time of directly measuring a flow rate of exhaust gas flowing through an exhaust gas flow path and an air-fuel ratio of the exhaust gas, and on the basis of the flow rate and air-fuel ratio of the exhaust gas, calculating fuel consumption, reduce a measurement error of the fuel consumption. Also, the invention is a fuel consumption calculation unit that, with use of an exhaust gas flow rate obtained by a flow rate sensor provided in an exhaust gas flow path through which exhaust gas of an engine flows, and an air-fuel ratio obtained by an air-fuel ratio sensor provided in the exhaust gas flow path, calculates fuel consumption of the engine, and on the basis of the air-fuel ratio obtained by the air-fuel ratio sensor, changes a value of exhaust gas density used for the calculation of the fuel consumption.

Fuel consumption calculation unit, fuel consumption measuring apparatus, and exhaust gas measuring apparatus

In order to provide a flow rate measurement device that can measure a flow rate of a sample fluid passing a tube body with high accuracy even though temperature irregularity of the sample fluid generates along a radial direction of the tube body, the flow rate measurement device comprise a temperature measurement device that measures a mean temperature of a sample fluid discharged from an internal combustion engine or temperature distribution of the sample fluid along a radial direction of the tube body, and a flow rate of the sample fluid is measured based on the mean temperature or the temperature distribution measured by the temperature measurement device.

Flow rate measurement device, fuel efficiency measurement device, program for flow rate measurement device and flow rate measurement method

An instrument that directly measures a flow rate and air-fuel ratio of exhaust gas, and from the flow rate and air-fuel ratio of the exhaust gas, calculates fuel consumption measures the fuel consumption at high response speed and with high accuracy. The instrument is provided with: an ultrasonic flowmeterthat measures a flow rate QEX of exhaust gas flowing through an exhaust gas flow path R; and an arithmetic unitthat calculates fuel consumption Fe of an engine with use of the exhaust gas flow rate QEX obtained by the ultrasonic flowmeterand an air-fuel ratio AFR obtained by an air-fuel ratio sensorthat measures the air-fuel ratio AFR of the exhaust gas flowing through the exhaust gas flow path R.

Fuel consumption measuring instrument

A system for determining a number of particles includes a diluter arranged at a connecting point of a main flow channel and dilution gas flow channel, a dilution gas flow rate control part that controls the flow rate of the dilution gas introduced into the diluter, a particle number measuring unit that measures a number of solid particles in a diluted exhaust gas, a bypass flow channel that bifurcates from between the diluter and particle number measuring unit in the main flow channel and in which a constant flow rate unit is arranged, and an information processing unit that calculates the dilution factor of the exhaust gas based on a dilution gas flow rate controlled by the dilution gas flow rate control part, and a total of a unit flow rate of the particle number measuring unit and a set flow rate of the constant flow rate unit.

Growing community of inventors

Kyoto, Japan

Masanobu Akita