Diesel smoke causes?
Diesel engine exhaust black smoke from diesel combustion is not sufficient, at high temperatures with the decomposition of a carbonaceous gas emissions phenomenon. Exhaust black smoke, not only reduces the engine power, an increase of diesel oil consumption, and easy to form coke and shorten engine life. The following reasons:
First, lack of fresh air in the cylinder
Reasons: (1) air cleaner filter dust too; (2) mufflers rust, coke or oil. (3) The intake and exhaust valve clearance is too large, so reducing the valve opening; (4) Orchestration body parts loosening, wear, deformation, camshaft gear and crankshaft timing gear changes in the relative position, valve opening and closing time is not correct.
2, cylinder compression temperature and pressure drop at the end of reasons:
(1) cylinder, piston ring wear excessive piston ring is not properly installed or loss of elasticity of the cylinder caused by leakage; (2) The valve clearance is too small, hot car easily top opening, or valve ablation, carbon deposition caused by the cylinder Mifengbuyan; (3) cylinder head and the body, fuel injector and cylinder head joints leak; (4) valve to severe subsidence, piston and piston pin, piston pin and connecting rod small head, big head and the rod axis connecting rod neck gap is too large, so that combustion chamber volume increases, the compression ratio down.
3, diesel spray bad
Reasons: (1) Fuel Injector Pressure Adjustment too low; (2) fuel injector pressure regulator spring break or card; (3) injector needle and seat coke, needle, or wear off very catching;
(4 ) Fuel Injection Pump Delivery Valve vacuum ring wear off very, so injectors drip.
4, fuel oil the amount of time and incorrect
The reasons are: (1) The fuel supply too late; (2) the early start, gas pressure and temperature lower, when the oil too early; (3) fuel pump plunger worn to increase oil supply travel use; (4) The fuel injection pump gear adjustment pole or rod stroke is too large, resulting in excessive oil.