| 摘要 |
A variable type oil jet is provided to cool a piston by injecting oil through a plurality of nozzles moving forward and backward according to the position of the piston, and to thereby maximize the cooling efficiency. A variable type oil jet includes a piston sensor(21), a controller(22), an oil pressure controller(23), and an oil jet unit(20). The piston sensor senses an ascending position of a piston. The controller judges a position of the piston based on an electric signal from the piston sensor and outputs a control signal. The oil pressure controller operates according to the control signal from the controller, and pressurizes oil so as to control an oil pressure. The oil jet unit is installed at a lower side of the cylinder block and injects supplied oil to an oil gallery of the piston while adjusting the motion of a nozzle. |
