Heavy-duty commercial vehicles have many ways to save energy and reduce emissions


In 2007, China's heavy truck sales grew at a rapid rate, with an increase of more than 50% year-on-year. In the first quarter of this year, sales of heavy trucks reached new record highs, reaching 167,000 units, a rapid increase. At present, the number of heavy trucks has exceeded 2.3 million, and heavy-duty trucks have become more and more polluted by the atmosphere. Energy-saving and emission-reduction have become an increasingly pressing task faced by heavy-duty truck companies.

With the worsening of the environment and the increasingly tense energy, European and American countries have increasingly higher requirements for vehicle emissions and energy conservation. How can China's heavy truck companies achieve energy conservation and emission reduction goals?

Engine Upgrade Reduces Pollutant Emissions

The engine reduces pollutant emissions by upgrading the fuel system and the exhaust gas treatment system. Tan Xiuqing said that the use of advanced technology engines can effectively reduce fuel consumption and reduce environmental pollution. At present, the fuel system used in the State III engine is mainly high pressure common rail technology. There are two ways to reduce pollutant emissions in exhaust gas treatment, one is EGR (Exhaust Gas Recirculation) and the other is SCR (Selective Catalytic Reduction). Compared with SCR, EGR neither increases fuel consumption nor requires additional chassis space, and can also achieve weight savings. There are no problems in achieving State III, State IV emission standards through these two methods.

In addition to traditional diesel power, other fuels and power applications can also effectively reduce pollutant emissions, such as natural gas. The domestic natural gas reserves are relatively abundant. In some regions, natural gas fueled vehicles have been used extensively. Tan Xiuqing said that hybrid vehicles have advantages in reducing fuel consumption and reducing noise, and they should also try hard.

Seven Ways to Achieve Energy Saving Goals

In 2008, the issue of energy-saving for heavy-duty commercial vehicles became more and more prominent. In particular, the increase in raw material prices caused most heavy-duty commercial vehicle manufacturers to feel pressure. The rise in oil prices also puts users under economic pressure. The goal of saving energy through technological advancement has become the focus of manufacturers.

Tan Xiuqing said that the energy-saving of heavy-duty commercial vehicles can be achieved by reducing the vehicle's own weight, using advanced engines, matching the entire vehicle, improving the efficiency of the transmission system, using auxiliary facilities (such as diversion devices), radial tires, and maintenance.

The application of new materials, such as aluminum-magnesium alloys, composite materials, and high-strength steels, can effectively reduce the vehicle's own weight. For example, the flywheel shell is changed from iron to aluminum, which can reduce the weight of 30kg. Reducing the number of leaf springs and using air suspensions, rubber suspensions, etc. can also reduce vehicle weight. The rear suspension of the cab removes the cross beam and replaces the connecting rod with a shock absorber, which can reduce the weight of the vehicle by 5 kg.

Tan Xiuqing believes that whether or not vehicle matching is reasonable will affect the energy efficiency of vehicles. Targeted matching design should be carried out and a reasonable assembly should be used to achieve the best economic performance. It is recommended that relevant companies strengthen the above-mentioned seven aspects of research and that the technologies that have been initially applied should strengthen market promotion. In addition, OEMs and parts factories should strengthen cooperation and exchanges to jointly promote the progress of energy-saving and emission reduction technologies for heavy-duty commercial vehicles.

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