1. TOP
  2. Csr Activities
  3. What Hitachi Zosen Can Do For the Earth, for People
  4. Protecting the Environment
  5. 2. Reducing NOx emissions from marine diesel engines

Protecting the Environment

2. Reducing NOx emissions from marine diesel engines

Reducing NOx emissions from marine diesel engines

NOx emission regulations on marine diesel engines

Ships and boats play a key role in the transportation of goods as part of global economic activity, and also provide an important source of leisure and enjoyment.
In the same way that vehicles such as trucks and buses are already subject to regulation on NOx emissions that pollute the atmosphere, increasing regulation of NOx emissions from marine traffic is expected in the future.

Environmentally-friendly marine diesel engines

Electronic control engine
Electronic control engine :type ME

Hitachi Zosen has developed marine diesel engines designed to comply with stricter NOx emission regulations.
2003 marked the release of the first Hitachi Zosen engines in Japan equipped with electronic controllers capable of reducing both NOx and CO2 emissions to below the level of conventional mechanical engines.
Emissions are reduced via variable programming of fuel injection spraying and exhaust valve timing as opposed to conventional fixed timing. The added flexibility of variable programming reduces overall fuel consumption and also reduces the content of NOx and smoke in exhaust gases.
In this way, Hitachi Zosen is working to provide environmentally-friendly marine diesel engines to comply with increasingly strict NOx emission regulations.

International Maritime Organization (IMO) introduces tougher NOx regulations

In 2008, the International Maritime Organization (IMO), an organ of the United Nations, called for an 80% reduction in NOx emissions relative to 2008 levels in marine areas suffering from pronounced atmospheric pollution, to be achieved by 2016. This announcement prompted marine diesel engine manufacturers and ship builders to join together in the development of new technologies to comply with the regulations.