Towards a Global Standard for Next-Generation Emission Measurement Systems: U.S. EPA Orders HORIBA’s Testing Instrument for the World’s Cleanest Tier 2 Vehicles

30 August 2003

HORIBA INSTRUMENTS INCORPORATED, (Head office: California; President: Juichi Saito), which is a U.S. subsidiary of HORIBA, Ltd., has received an order from the U.S. Environmental Protection Agency (EPA) for a next-generation emission measurement and testing instrument. This product is a testing instrument designed to provide accurate emission measurement for Tier 2 vehicles, which currently satisfy the most stringent emission regulations in the world. The EPA has introduced such a next-generation emission testing instrument for the first time, and this has attracted the attention of auto manufacturers and research institutes worldwide.

It is noteworthy that in recent times, the concentration of emission from low-emission vehicles has been considerably low. The concentrations of certain emission components of some vehicles are even less than those in atmospheric air, and it has therefore been a challenge for world auto manufacturers and research institutes to accurately measure such regulated emission components.

This emission measurement and testing instrument is to be used in the Tier 2 vehicle test facilities of the U.S. EPA’s National Vehicle and Fuel Emissions Laboratory (NVFEL; Ann Arbor, Michigan). As a manufacturer of measurement instruments, it is a great honor for us that our product has been chosen by one of the world’s most authoritative emission regulatory agencies. We have gained recognition for our reliability and service, not to mention our product performance. Among other things, this product is a state-of-the-art instrument which measures vehicular emission to satisfy the world’s most stringent regulations. This means that our emission measurement capability has been regarded as highly suitable for measurement of emission from Tier 2 vehicles.

Moreover, the measurement instrument to be supplied to the EPA is based on a next-generation measurement system (BMD system) newly certified in 2001, as well as a conventional system (CVS system), so that the EPA can use it to measure emission from Tier 2 vehicles. Further, we have also incorporated our patented emission sampling system into the BMD system. It is expected that the U.S. EPA’s decision to adopt a product of the HORIBA Group will serve as a recommendation for world auto manufacturers and research institutions that are considering adopting a new-generation emission measurement system.

The HORIBA Group enjoys about 80% of the world’s market share in the field of emission measurement. As a key player in the field, the Horiba group has been constantly innovating and providing high quality services, and demonstrating good sales and marketing for nearly 40 years. It is because of this reputation that the HORIBA Group has earned the trust of auto manufacturers and certification bodies alike.

We believe that the order for the testing instrument for Tier 2 vehicles from the U.S. EPA is a sign of appreciation for the Horiba Group’s continued efforts to invent new systems, and its all-round reliability in terms of brand value, technological capability, and service. We aim for our products to represent a global standard in the field of emission measurement as well as in the Tier 2 measurement instrument market, and for our conventional systems to set a similar standard.


< Informative References >
●The measurement instrument to be supplied to the EPA
・Motor Exhaust Gas Analyzer
・Exhaust Gas Sampler
・Chassis Dynamometers
・Test Automation System(Software for measurement control)

●Trends in Emission Regulations
Emission regulations in Japan, the U.S., and Europe have become increasingly stringent since the 1970s, and the amount of hazardous substances currently being emitted has been reduced to as much as one-hundredth of what it was about 30 years ago.

In 2000, the Ministry of Land, Infrastructure, and Transport implemented a new emission regulation, namely, a low-emission vehicle certification system. As a result of this regulation, vehicles achieved a considerable reduction in the emission of hazardous substances such as hydrocarbons (HC), nitrogen oxides (NOx), and particulate matter (PM), in relation to the 1978 standards currently in place. Vehicles that achieve a 25% reduction are certified as “Good―low-emission vehicle (☆),”those that achieve a 50% reduction as “Excellent―low-emission vehicle (☆☆),” and those with a 75% reduction as “Superb―low-emission vehicle (☆☆☆).”

The Environmental Protection Agency (EPA) and the California Air Resources Board (CARB) are internationally renowned emission regulatory agencies in the U.S.

EPA: The EPA is a regulatory agency that stipulates regulations throughout the U.S., except in California and some eastern states. It has stipulated regulations such as the Tier 1 and Tier 2 regulations.
Our instrument ordered by the U.S. EPA is to be used for the Tier 2 regulation, whose standards are equivalent to those of the SULEV regulation, stipulated in California, which is one of the world’s most stringent regulations.

CARB: The CARB is a regulatory agency that stipulates exclusive regulations for California. It has stipulated regulations such as the Low Emission Vehicle (LEV), the Ultra-low Emission Vehicle (ULEV), and the Super Ultra Low Emission Vehicle (SULEV) regulations. The SULEV regulation requirements are 0.01 g/mile for hydrocarbons (HC) and 0.02 g/mile for nitrogen oxides (NOx), which are one-ninth and one-twelfth respectively, of those of the LEV regulations. With a duration standard of 120,000 miles, these are the most stringent requirements in the world.

The Euro regulations are currently being implemented in stages as emission standards for the whole of Europe. The Euro3 regulations took effect in 2000 and the Euro4 regulations will be introduced in 2005.

● Emission Sampling Systems (BMD and CVS systems)
Emission regulation requirements are expressed in mass, and are calculated from the concentration of an emission component and the exhaust flow rate. As the concentration of a component decreases, the emission sampling system plays a more important role in obtaining an accurate measurement of emission.

Bag Mini Diluter (BMD) system: This system makes it possible to sample emission in a transparent plastic bag. A part of the emission is sampled, and the sample is diluted at a constant ratio. The mass flow technology of STEC, Inc., a Horiba Group company, is adopted to control the flow rate, enabling a highly accurate and stable dilution. This system is suitable for ultra-low concentration components.

Constant Volume Sampler (CVS) system: This system makes it possible to sample a constant amount of sample. All the emission is sampled, and the sample is then diluted at a constant flow rate. This system has been widely utilized.