The TNV series adds a whole range of “goodies†that make this engine a mechanical “Work of artâ€
The much acclaimed “Clean and Silent†TNE series has just become even better. Its called the TNV and it stand for Total New Value. Lets take a look…..
Emission Reduction (ie a cleaner Engine)
Cleaner engines with even lower exhaust emissions are achieved by improving on the already excellent TNE base. Stricter emission standards are cleared by a wide margin.
IDI engines
1. Combustion Chamber
By investigating flow characteristics using experimental and numerical analysis methods, Yanmar research has achieved improved flow mixing in both the main chamber and the special mouth surrounding the injector. More efficient use of the incoming air charge results in cleaner burn and lower exhaust emissions.
2. Fuel Injection Equipment Mechanical Pump
Instead of a PFR pump, a newly developed in-line pump has been used for the smaller TNV engines. Adjustments are made solely in the Yanmar’s own FIE factory ensuring precise compliance with regulations. Also the following features are incorporated:
- Increased force is applied by the governor to quicken the fuel controlling rack response time. Engine revs are more constant. Matching to a wide range of machinery is simplified.
- Emissions have been reduced by controlling fuel injection timing according to engine load.
- Cam profiles are matched to nozzle throttle needs, which give a better controlled injection rate. Emissions are reduced.