Energy-saving diesel engine with multi-stage variable fuel supply transmission ratio and multi-operation mode

Abstract

The invention discloses an energy-saving diesel engine having a multistage variable oil-supply transmission ratio and multiple running modes. The energy-saving diesel engine comprises a high-pressure oil pump, a diesel engine body and an oil tank, the high-pressure oil pump is of a double-oil-cylinder structure, the diesel engine body is of a double-piston-cylinder structure, two piston cylinders are respectively communicated with two oil cylinders correspondingly through electric-control oil injectors, plungers of the two oil cylinders correspondingly contact with two cams on a cam shaft respectively through pushing rods, pistons of the two piston cylinders are correspondingly connected with two connecting rod drivers on a crankshaft respectively through connecting rods, an oil supply speed-variable transmission mechanism is arranged between the cam shaft and the crankshaft, and the two electric-control oil injectors are communicated with a pressure-storage energy storing tank respectively through electric-control one-way valves. The multistage variable oil-supply transmission ratio can be automatically adjusted according to rotating speed of the diesel engine, low-speed oil-supply efficiency and stability can be improved, and high-speed oil-supply energy waste can be reduced; the multiple running modes can be started according to road conditions, so that fuel consumption of the diesel engine can be reduced, and emission pollution can be lowered.

Description

technical field [0001] The invention relates to a vehicle diesel engine, in particular to an energy-saving diesel engine with multi-stage variable fuel supply transmission ratio and multiple operating modes. Background technique [0002] With the increasing shortage of petroleum fuels and the increasing environmental pollution, energy-saving and environment-friendly diesel engines have attracted more and more attention. When the vehicle is driving on urban roads, the driving speed is relatively low, and the power requirements for the diesel engine are not high, and a diesel engine with a small displacement is required, especially when encountering congested road conditions, the smaller the displacement of the diesel engine, the better, or even When encountering a red light or congestion and causing temporary parking, the high-pressure oil pump needs to stop fuel supply, and the diesel engine stops running, thereby reducing the fuel consumption of the diesel engine and reduci...

AI Technical Summary

Problems solved by technology

However, this invention only improves the cam of the camshaft of the high-pressure oil pump. The camshaft is still connected to the crankshaft of the diesel engine through gear meshing, and the transmission ratio is fixed and invariable. The oil supply stability is poor; high-speed operation, the crankshaft and camshaft speed are too high, the high-pressure oil pump has excess oil supply capacity, and it does not have the flexibility to switch operation modes according to road conditions, and the oil is cut off when encountering temporary parking conditions such as red lights Function

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