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Taiwan to Launch 6th-stage (Euro 4) PTW Emission Standard in 2017

2014/05/27 | By Quincy Liang

To match the pollution-prevention standards of the industrially advanced nations, Taiwan's government promulgated sixth- and seventh-stage emissions standards for powered two-wheelers (PTWs) in late 2013, with implementation slated for 2017 and 2021, respectively.

The island's existing fifth-stage emission standard for PTWs, which was put into effect in mid-2007, is equal to the Euro 3 standard imposed by the European Union (EU). Taiwan's sixth- and seventh-stage standards will be similar to the Euro 4 and Euro 5 standards.

Taiwan's 6th- and 7th-stage Emission Standards

Taiwan's 6th-stage Emission Standard (effective in 2017)

Equal to

Euro 4 (effective in 2016)

Taiwan's 7th-stage Emission Standard (effective in 2021)

Equal to

Euro 5 (effective in 2020)

Source: ARTC.

The Automotive Research & Testing Center (ARTC), Taiwan's top transportation vehicle R&D and testing/inspection hub in Taiwan, points out that from the effective date of Euro 5, and of the seventh stage in Taiwan one year later, there will be new requirements for non-methane hydrocarbon (NMHC) and particulate matter (PM) emissions.

At the same time, the type of testing will be switched to the United Nations-approved Worldwide Motorcycle Test Cycle (WMTC), from the current six ECE-15 urban driving cycles (UDC) and one Extra-Urban driving cycle (EUDC).

From the sixth stage, ARTC notes, the test process will use only the SHED (Sealed Housing for Evaporative Determination) test, which is more objective for hydrocarbon (HC) testing that the canister trap or Sealed Housing Evaporative Determination (SHED) method used previously.

Test Method and Emissions Standard

5th stage (2007)

6th stage (2017)

7th stage (2021)

Test Method

Canister Trap or SHED

SHED

SHED

Emissions Standard

Less than 2g each test

Less   than 2g each test

Less than 1.5g each test

Note

--

Equal to Euro 4

Equal to Euro 5

Source: ARTC

The sixth-and seventh-stage emissions standards will also lengthen the PTW durability guaranteed mileage for emissions control from 15,000 kilometers to 20,000 and 35,000 kilometers, respectively.

Extended PTW Durability Guarantee Mileage for Emissions Control

Category

6th stage (2017)

7th stage (2021)

Maximum Speed < 130km/h

20,000km

20,000km

Maximum Speed > 130km/h

35,000km

35,000km

Note

Equal to Euro 4

Equal to Euro 5

Source: ARTC

Following evaluation by the Environmental Protection Administration (EPA), the assigned multiplicative deterioration factors of Taiwan's future PTW emissions standards will be adjusted slightly from the Euro 4 and Euro 5 standards, as follows:

Assigned Multiplicative Deterioration Factors of Future PTW Emissions Standards

CO HC NMHC NOx PM
Euro 4

1.3

1.2

--

1.2

--

6th stage

1.400

1.400

--

1.400

--

Euro 5

1.3

1.3

1.3

1.3

1.3

7th stage

1.400

1.400

1.400

1.400

1.400

Source: ARTC

When Taiwan's 6th-stage emissions standard becomes effective, all new PTWs sold on the island will have to be equipped with an On-board Diagnostics (OBD) system to provide higher-precision emissions tests. In addition, more than 20% of the PTWs sold by any PTW vendor in Taiwan with an annual sales volume of more than 10,000 units will be required to meet the "zero emissions during idle speed" standard after 2017, and the ratio will be boosted to 50% in the 7th stage. Under this requirement, more and more PTWs with a stop-start function (like that now adopted by many fuel-efficient car models) or hybrid propulsion systems are expected to be introduced to the market.