Cam with changeable circle diameter

Abstract

The invention discloses a cam with a changeable circle diameter. The cam is characterized in that the cam is divided into two half circles, one half circle is fixed, the other half circle is movable, a centrifugal controller and a cold-hot lifting-contracting machine are arranged on the fixed half-circle cam and a cam shaft, the centrifugal force is used for pushing and pressing a movable clamping sheet and contradicts the force of the cold-hot lifting-contracting machine, one end of the movable clamping sheet is thick and the other end of the movable clamping sheet is thin, the movable clamping sheet is in closed openings of the two half-circle cams, the two half-circle closed openings are enlarged when the movable clamping sheet is pushed and pressed deeply, when the closed openings are enlarged, the circle diameter of the cam is enlarged, an oil supply angle can be in advance due to the enlarged cam, when the rotation speed of a diesel engine is high, the push force of the centrifugal controller is large, the oil supply angle is in advance, and when the temperature of a diesel engine body rises, the lifting force of the cold-hot lifting-contracting machine is increased and contradicts the pushing force of the centrifugal controller, so that the force of the centrifugal controller for pushing the movable clamping sheet is reduced, and the diesel oil supply angle of the diesel angle can be changed along with the change of the rotation speed and the temperature.

Description

Technical field: [0001] The invention relates to a fuel supply cam for a diesel engine, in particular to a cam that can automatically control the angle of diesel supply, and can make the supplied diesel oil follow the rotation speed of the diesel engine crankshaft and the temperature of the fuselage to change the angle of the diesel supply. Background technique: [0002] The cam of existing common diesel oil is when promoting diesel pump, and angle is fixed, and can only adjust oil supply angle again when pulling down diesel pump assembly, is to use the circle surrounding raised part of wheel, promotes oil pump to supply oil. [0003] Because the oil supply angle of the current ordinary diesel engine does not change when it is rotating, the piston of the cylinder is compressed due to the change of the rotational speed, the change of the temperature of the cylinder wall and the change of the natural pair, so that the diesel engine with the same oil supply angle cannot meet the...

AI Technical Summary

Problems solved by technology

[0003] Because the oil supply angle of the current ordinary diesel engine does not change when it is rotating, the piston of the cylinder is compressed due to the change of the rotational speed, the change of the temperature of the cylinder wall and the change of the natural pair, so that the diesel engine with the same oil supply angle cannot meet the required requirements. The self-ignition position burns, but the output horsepower cannot reach the maximum, which causes waste of fuel. The cam that changes the oil supply angle with the speed and temperature increases the output horsepower.

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