The DTDL.2007G/19 project includes many testing objects such as engines, passenger cars, light duty vehicles,34,37-39 the findings from testing engines are presented in detail as follows.

The testing objects include 02 diesel engines D243, Belarus made. One used market diesel, another used biodiesel B5. These engines are usually used in tractors and fishing boats. Specifications of the testing engines are shown in Table 23.8.

Comparative tests were conducted on load curves and speed curves to investigate impacts of B5 fuel on engine’s performance. To assess exhaust emissions, R49 driving cycles (equivalent to Euro 2 emission standard — the one currently applied for heavy duty vehicle engines in Vietnam) were used for the testing engines.

Table 23.8 Specifications of the testing engines

Specifications

D243

In-line, diesel, four stroke Mechanical direct injection Four

110 mm x 125 mm 4.749 litres 16.4:1

80HP/2200rpm

The two testing engines were also operated within 300 hours durability tests to assess engine components, lubrication oil, as well as engine’s performance and exhaust emissions.

The test-cell used to conduct comparative tests and durability tests is high dynamic engine AVL test-cell for heavy duty vehicle’s engines at Laboratory of Internal Combustion Engine, Institute of Transportation Engineering, Hanoi University of Technology.

Emission bench CEBII was used for gaseous emissions analysis. Particulate matter was sampled by the AVL Smart sampler 743. The testing apparatuses are presented in Fig. 23.19.

638 Handbook of biofuels production