The Japanese Test Procedure (JATP) is a standardized test procedure used to measure the emissions of vehicles sold in Japan. It is designed to ensure that vehicles meet certain standards for air pollution and contribute to the overall health and well-being of communities in the country. The JATP has been implemented by the Japanese Ministry of Land, Infrastructure, Transport and Tourism (MLIT) and is used to test vehicles for compliance with Japanese emissions standards.
The JATP test is conducted on a chassis dynamometer, which simulates the resistance and inertia of driving on a road. The test is divided into three phases, each of which represents a different driving condition:
- Urban cycle: The urban cycle simulates driving in city traffic, with a mix of acceleration, braking, and idle periods. This phase is designed to represent a typical urban driving pattern and accounts for about 20% of the total test distance.
- Extra-urban cycle: The extra-urban cycle simulates driving on a highway or open road, with steady speeds and relatively few accelerations or decelerations. This phase is designed to represent a typical suburban or rural driving pattern and accounts for about 60% of the total test distance.
- Constant speed cycle: The constant speed cycle simulates driving at a constant speed of 60 km/h for a short distance.
| Feature | Description |
|---|---|
| Purpose | To measure the emissions of vehicles sold in Japan and ensure that they meet certain standards for air pollution and contribute to the overall health and well-being of communities in the country. |
| Test Method | Conducted on a chassis dynamometer, which simulates the resistance and inertia of driving on a road. Divided into three phases representing different driving conditions. |
| Phases | Urban cycle (simulates city traffic), extra-urban cycle (simulates highway or open road driving), constant speed cycle (simulates driving at a constant speed of 60 km/h). |
| Test Centers | Designated test centers located throughout Japan, equipped with specialized equipment to accurately measure emissions. |
| Results | Used to determine the emissions rating of the vehicle and ensure it meets required standards. |
| Standards | Set by the Japanese Ministry of Land, Infrastructure, Transport and Tourism (MLIT) and used to test vehicles for compliance with Japanese emissions standards. |
The JATP test is conducted at designated test centers located throughout Japan. These centers are equipped with specialized equipment, including exhaust gas analyzers and other measurement devices, to accurately measure the emissions of vehicles during the test.
Throughout the test, the vehicle’s emissions are measured using this equipment. The results of the test are used to determine the emissions rating of the vehicle and to ensure that it meets the required standards.
In summary, the Japanese Test Procedure (JATP) is a critical part of ensuring that vehicles sold in Japan meet certain standards for air pollution and contribute to the overall health and well-being of communities in the country. It is conducted at designated test centers using specialized equipment and is used to test vehicles for compliance with Japanese emissions standards.
What is the purpose of the Japanese Test Procedure (JATP)?
The purpose of the JATP is to measure the emissions of vehicles sold in Japan and ensure that they meet certain standards for air pollution and contribute to the overall health and well-being of communities in the country.
How is the JATP test conducted?
The JATP test is conducted on a chassis dynamometer, which simulates the resistance and inertia of driving on a road. The test is divided into three phases, representing different driving conditions, and is conducted at designated test centers using specialized equipment, including exhaust gas analyzers and other measurement devices, to accurately measure the emissions of the vehicle.
What are the three phases of the JATP test?
The three phases of the JATP test are the urban cycle, which simulates driving in city traffic; the extra-urban cycle, which simulates driving on a highway or open road; and the constant speed cycle, which simulates driving at a constant speed of 60 km/h.
How are the results of the JATP test used?
The results of the JATP test are used to determine the emissions rating of the vehicle and to ensure that it meets the required standards. These standards are set by the Japanese Ministry of Land, Infrastructure, Transport and Tourism (MLIT) and are used to test vehicles for compliance with Japanese emissions standards.
Here are a few sources that provide more information about the Japanese Test Procedure:
- The Japanese Ministry of Land, Infrastructure, Transport and Tourism (MLIT) provides an overview of the JATP and the emissions standards for vehicles in Japan on their website: https://www.mlit.go.jp/en/vehicle/regulation/vehicle_law/index.html
- The Japan Automobile Manufacturers Association (JAMA) also provides information about the JATP and Japanese vehicle emissions standards on their website: https://www.jama.or.jp/en/technical_information/vehicle_regulation/index.html
- The International Council on Clean Transportation (ICCT) has published a report on the JATP and its effectiveness in reducing vehicle emissions in Japan: https://www.theicct.org/publications/japan-vehicle-emissions-standards-overview
