Wide Range Oxygen Sensor ZFAS®-U2 – NGK SPARK PLUG CO.LTD.

By controlling in combination with a dedicated interface, it can control in accordance with the concentration of oxygen in the exhaust gas.

Paired with a special interface circuit, this sensor can produce an electric current corresponding to the exhaust gas O2 concentration. This sensor can be used for control over a wide range of air-fuel ratios from precise stoichiometric control, to lean burn, to enrichment for component protection. The capability of lean measurement enables control for lean burn and diesel engines. Compared to the previous design the ZFAS®-U2 wide range air-fuel sensor achieves outstanding reliability and activation speed.

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Accurate output over the entire measurement range
Fully sealed waterproof design does not require external reference air
Excellent heat resistance for improved durability
Fast activation (5sec) due to monolithic heater and element structure
While a standard oxygen sensor essentially outputs only two states-either rich or lean, the wide range air-fuel sensor is able to measure the degree of richness or leanness. Knowing the magnitude of deviation from the stoichiometric point enables more precise control of the air-fuel ratio. The figure bottom of this page (Histogram of controlled A / F during driving mode) shows the air-fuel ratio distribution over a drive cycle. Exhaust gas contains fewer toxins in the region close to the stoichiometric air-fuel ratio. The lighter background in the figure indicates cleaner exhaust, while the darker regions represent more pollutants. Since the wide range sensor produces a narrower distribution around the stoichiometric point, emissions can be lower than with a standard oxygen sensor. This sensor also enables air-fuel control at points other than stoichiometric, which is applicable to lean burn or diesel engines.

Change that is not an extension of the past.

Since its foundation in 1936, the Nippon Tokushu Toryo Group has been exploring the possibilities of ceramics, contributing to the development of society, and building trust with customers under the principles of “Total Participation” and “Ryohin-ism,” which are the starting points of our manufacturing activities.

In our more than 80-year history, which has grown in tandem with the automobile-related business, we are now entering a phase of great change. The economic structure itself is undergoing major changes due to the rapid progress of technological innovation, including electric vehicles. Now is the time for us to not remain in the status quo, but to take a giant leap toward a “new stage” for our company.

In June 2020, we announced our long-term vision for 2040, “Beyond ceramics, eXceeding imagination. The vision is to face the challenges of the world and to make a better use of our resources. In order to face the challenges facing the world and contribute to the realization of a better society, it is necessary to take on challenges that go beyond the realm of ceramics, rather than sticking to the “what can be done with ceramics” of the past.

The future of the NSSC Group will aim for “change that is not an extension of the past. In a rapidly changing environment, each and every employee will always be aware of the action guideline “Change with Will! and with high aspirations, we will continue to work to solve social issues.

Supplier Information

  • Store Name: NGK SPARK PLUG CO.,LTD.
  • Address: 461-0005
    Aichi Higashi-ku 1-1-1 Higashisakura