Engine valve adjuster
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHideo Nakamura
Life of this patent
Estimating the term…
Abstract
A variable valve timing mechanism (VVT) for adjusting the valve timing of an intake valve of an internal combustion engine. The VVT has first and second pressure chambers for receiving oil. An oil control valve (OCV) is provided for controlling oil flow from a pump. Passages are provided for connecting the OCV to the pressure chambers to supply oil to the chambers in a controlled manner. A filter is located in the passage for filtering the oil. The filter is supported in water jacket where coolant flows. The filter is heated by the coolant to decrease the flow resistance of the oil.
Claims13
An apparatus for adjusting the valve performance of an internal combustion engine valve, the apparatus having a pressure chamber for receiving oil, wherein the apparatus is hydraulically driven by the oil pressure, the apparatus comprising:
- a reservoir for reserving oil;
- a pump for discharging the oil from the reservoir;
- a control valve for controlling the oil flow from the pump;
- a passage for connecting the control valve to the pressure chamber to supply the oil to the pressure chamber;
- a filter positioned in the passage for filtering the oil;
- and
- a heater for heating the filter to a temperature that is approximately the same as that of an interior part of the engine.
An oil supply structure for a mechanism that adjusts the valve performance of a valve of an internal combustion engine, wherein the mechanism has a pressure chamber for receiving oil, wherein the mechanism is driven by hydraulic oil pressure, the structure comprising:
- a reservoir for reserving an oil;
- a pump for discharging oil from the reservoir;
- a control valve for controlling the flow of oil discharged from the pump;
- a passage for connecting the control valve to the pressure chamber to supply oil to the pressure chamber;
- a filter positioned in the passage for filtering the oil;
- and
- a heater for heating the filter to a temperature that is approximately the same as that of an interior part of the engine.
Dependencies are inferred from the claim text.