| 摘要 |
<p>#CMT# #/CMT# The device has a cam cooperating with a pump piston to generate forward and backward motions of the piston. The cam has a cam lobe curve (18) whose form is modified from a form corresponding to a sinusoidal wave (19) such that piston acceleration increases and decreases, respectively, at start and end of an upward travel of a section of the curve in comparison to the wave. The curve has a form in its section that is obtained from an overlapping of alternation of the wave (19) and another sinusoidal wave (20) which has a double the frequency of and a lesser amplitude than the wave (19). #CMT#USE : #/CMT# Device for driving a high pressure piston pump that is utilized in an internal combustion engine. #CMT#ADVANTAGE : #/CMT# The device is designed such that the cam lobe curve is constructed with a reduced kinematics vibration stimulation of a pump element spring and with an increased marginal rotational speed. The device increases piston acceleration at the start of the upward travel and reduces the piston deceleration at the end of the upward travel, and avoids the uncontrolled introduction of harmonics, which leads to a lifting of the pump piston with a low speed. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a graphical representation of a cam lobe curve. 18 : Cam lobe curve 19, 20 : Sinusoidal wave.</p> |
