Abstract:
PROBLEM TO BE SOLVED: To provide an oil amount adjusting device capable of adjusting an oil amount only at a desired sliding part according to temperature of the oil.SOLUTION: An oil amount adjusting device 1 comprises: a housing 2 arranged on an upstream side of an adjusting object sliding part S1; a valve 4 that can reciprocate in the housing 2; a temperature sensitive spring 70 and a bias spring 71 for energizing the valve 4 in opposite directions to each other; a first chamber 22 and a second chamber 23 blocked on a surface side and a rear side of the valve 4; an interior passage 40 arranged between the first chamber 22 and the second chamber 23; a first outflow passage 210 arranged between the first chamber 22 and outside; and a second outflow passage B arranged between the second chamber 23 and outside. A flow rate of the oil O in the first outflow passage 210 is larger than that in the second outflow passage B. At low temperature, the valve 4 closes the first outflow passage 210 by an energization force of the bias spring 71. At high temperature, the valve 4 opens the first outflow passage 210 by an energization force of the temperature sensitive spring 70.
Abstract:
PROBLEM TO BE SOLVED: To provide an oil amount adjusting device capable of adjusting a flow rate of oil only at a desired sliding part according to temperature of the oil.SOLUTION: An oil amount adjusting device 1 is arranged in an oil path 8 for supplying oil O to plural sliding parts S1-S3 of an engine 9. Among all of the sliding parts S1-S3, some of sliding parts S1 and S2 are adjusting object sliding parts S1 and S2 for adjusting a flow rate of the oil O according to temperature of the oil O. The oil amount adjusting device 1 is arranged on an upstream side of the adjusting object sliding parts S1 and S2 in the oil path 8, and switches the flow rate of the oil O to the adjusting object sliding parts S1 and S2 at a low-temperature time and at a high-temperature time during which the temperature of the oil O is higher than the temperature at the low-temperature time.
Abstract:
PROBLEM TO BE SOLVED: To provide a piston cooling jet securing a valve opening state even when an oil path is clogged with foreign matters.SOLUTION: A piston cooling jet 1 includes: a housing 2; a nozzle 3 projecting outwardly from the housing 2 and capable of injecting oil O to a piston 91; a valve 4 capable of reciprocating inside the housing 2, and including a valve side oil passage 40 to which a load Fu is applied from a surface side by an oil pressure in an engine side oil passage 900 and which communicates with the engine side oil passage 900; a pressure chamber 21 defined inside the housing 2 in a back side of the valve 4 and communicating with the valve side oil passage 40; a pressure adjust passage B arranged between the pressure chamber 21 and the outside of the housing 2; and a filter 75 which is provided in the valve 4 and removes, from the oil O flowing through the valve side oil passage 40, foreign matters P that cannot pass through the pressure adjust passage B.
Abstract:
PROBLEM TO BE SOLVED: To provide an oil jet in which a valve opening pressure is mechanically automatically adjusted in accordance with an oil temperature.SOLUTION: A body 2 of an oil jet 100 includes: an oil supply port 6 which opens to an oil passage 62 in a cylinder block 60 of an internal combustion engine; a cylinder 4 which is communicated to the oil supply port 6 at one end with the other end being closed; and an oil injection port 10 which opens to a side surface of the cylinder 4. A piston valve 20 is housed in the cylinder 4. The piston valve 20 forms a differential pressure chamber 8 as a closed section in the cylinder 4, and an orifice 22 which communicates the differential pressure chamber 8 to the side of an oil supply port 6 is formed. The piston valve 20 is biased, by means of a spring 14, to a position where the piston valve closes the oil injection port 10. Further, a leak hole 42 which leaks oil to the outside of the body 2 from the differential pressure chamber 8 is formed on the body 2.
Abstract:
PROBLEM TO BE SOLVED: To calculate the influence of a fine shape formed on an inner surface of a cylinder, on oil film formation, accurately and in a short period of time.SOLUTION: A control section 11 of a simulation device 1 inputs a shape parameter (S1), performs a numerical calculation for a flow of an oil film between a piston ring string and a cylinder inner surface assuming that the cylinder inner surface has a fine shape (S2), performs a numerical calculation for the flow of the oil film between the piston ring string and the cylinder inner surface assuming that the cylinder inner surface has a smooth surface (S3), and calculates a correction coefficient based on the result of numerical calculations (S4). Next, the control section 11 applies a lubrication basic equation introduced with the correction coefficient to the lubrication film between the piston ring string and the cylinder inner surface having the fine shape and performs a lubrication calculation (S5), calculates a friction force based on the result of the numeric calculations and the lubrication calculation (S6), and outputs the result of calculation (S7).
Abstract:
PROBLEM TO BE SOLVED: To provide a control device of an internal combustion engine with a supercharger, the control device preventing preignition to be caused by oil deposited on an intake port.SOLUTION: The control device includes a variable valve mechanism that varies opening timing of an intake valve, and a means for acquiring an intake pipe pressure near the intake bottom dead center. During deceleration along with fuel cut, if the intake pipe pressure is kept lower than a set negative pressure for a set number of cycles or more, the control device determines that determination conditions are established. When the determination conditions are established, the control device closes the intake valve through the variable valve mechanism at least in a period from the bottom dead center of an intake stroke till the top dead center of a compression stroke. When the determination conditions are established, the control device opens an exhaust valve in an exhaust stroke.
Abstract:
PROBLEM TO BE SOLVED: To provide a filter device used for removing unnecessary objects from liquid, wherein high pressure is prevented from acting on a reacting body such as an ion exchanging material provided therein.SOLUTION: The filter device 1 is provided for removing the unnecessary objects from the liquid. The filter device 1 has a filter member 40 as a filtering body arranged in the first liquid passage 51 extending from an inlet to an outlet, a functional member 42 having the reacting body having a function to adsorb a predetermined component arranged in the second liquid passage 52 in communication with the first liquid passage 51, and an adjusting valve 54 as an adjusting device configured to adjust the flow of the liquid in the first liquid passage 51 and the flow of the liquid in the second liquid passage 52, and the adjusting valve 54 adjusts the flow of the liquid such that the liquid of a predetermined pressure or less flows into the second liquid passage.
Abstract:
PROBLEM TO BE SOLVED: To provide a sliding support structure of a piston pin, which reduces a friction loss by generating a sufficient oil film pressure in a load concentrated portion even when the load concentrated portion exists. SOLUTION: The sliding support structure of a piston pin 120 supplies a lubricating oil between sliding surfaces of relatively rotatable piston pin 120 and piston pin boss 106, wherein regions Y higher in oil repellency than other regions are provided in a sliding surface region of the piston pin 120 on the upstream side and downstream side in a flow direction of the lubricating oil so as to sandwich therebetween a sliding surface region X corresponding to the load concentrated portion of the piston pin 120 and piston pin boss 106. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a sliding bearing having excellent seizure resistance and wear resistance. SOLUTION: This sliding bearing includes a bearing body which supports a shaft through a lubricating oil and an elastic body installed on the rear surface of the bearing body. When the modulus of elasticity (X) of the elastic body is within the range of 0.005 to 1.0 GPa, the thickness (Y) of the elastic body is within the range of the expression (1) below. When the modulus of elasticity (X) of the elastic body is within the range of more than 1.0 to 2.0 GPa, the thickness (Y) of the elastic body is desirably within the range of the expression (2) below. The expression (1) is 50(μm)≤Y(μm)≤150Ln(X)+500(μm), and the expression (2) is 250(μm)≤Y(μm)≤500(μm). COPYRIGHT: (C)2010,JPO&INPIT