(1) Overall structure diagram
The structure of SAA6D125E-3 diesel engine is shown in Figure 2-3-1, and the structure of SAA6D107E-1 diesel engine is shown in Figure 2-3-2.
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(1) SAA6D125E-3 diesel engine complies with strict emission regulations: US EPA standard (2001 regulation), European regulation 2002, Japanese construction equipment regulation 2003, it is a diesel engine with high performance, high efficiency, low fuel consumption and low noise, Improved exhaust color, improved acceleration.
(2) SAA6D125E-3 diesel engine and SAA6D107E-1 diesel engine are both in-line, 6-cylinder, water-cooled, direct-injection diesel engines.
(3) SAA6D125E-3 diesel engine and SAA6D107E-1 diesel engine adopt electronically controlled common rail fuel injection system, which injects high-pressure fuel at a pressure of 118MPa, which can provide the best injection control to match the speed and load, thereby improving Diesel engine emission performance, reducing fuel consumption and noise.
(4) The piston is made of high-quality steel, cast in a vibratory cooling furnace, and has the lowest thermal expansion in Komatsu tradition, which improves the reliability and life of the diesel engine.
(5) SAA6D125E-3 diesel engine and SAA6D107E-1 diesel engine adopt electronically controlled common rail fuel injection system and the design of optimal divergence characteristics at low temperature startup, which improves startup performance and reduces white smoke emission.
(6) The turbocharger used on the 125E-2 diesel engine is improved, so that the air supply cycle part can control the impact at the end of the compressor, so that the performance is optimal, the speed range from low speed to high speed is wider, and the fuel consumption is lower .
(7) The thickness of the top surface of the cylinder block is increased, which can prevent deformation after long-term operation and make remanufacturing easier. In addition, by increasing the rigidity of the main reinforcement, the rigidity of the main body is improved, the deformation and vibration under load are reduced, and the generation of various noises is prevented.
(8) The size of the fuel supply pump of the electronically controlled common rail fuel injection system is 1/3 of the fuel supply pump of the ordinary in-line fuel injection system. In addition, the flange is used instead of the mounting seat, and it is tightly connected with the timing gearbox, thereby reducing noise.
(9) The air filter is changed from ordinary end face seal to radial seal to prevent dust from entering and damaging parts. Additionally, a 5-segment display-type air filter clogging sensor provides accurate information on cleaning times.
(10) The oil filter is a filter that combines high performance and high efficiency.
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(11) The fuel filter is a special fuel filter with high performance and high efficiency, which can filter out small particles of dirt and protect the electronically controlled common rail fuel injection system.
(12) If the electronic control unit judges that the diesel engine is working abnormally, it will issue a warning and the system will switch to the emergency escape mode.
(13) After starting the diesel engine at a very low temperature, if the diesel engine speed suddenly increases, the overload will apply excessive load to the bearing before the lubrication is sufficient, which will reduce the service life of the diesel engine, especially the overload will damage Non-locating bearings for turbochargers. In order to prevent this situation, a turbo protection system is installed to limit the diesel engine speed.
