초록 ▼

A convectively-cooled hydraulic fluid tank system comprises a hydraulic fluid tank and a fluid cooler incorporated into the hydraulic fluid tank. The fluid cooler includes a vortex chamber having a wall made of a heat conductive material. An inlet is provided to direct incoming pressurized hydraulic

A convectively-cooled hydraulic fluid tank system comprises a hydraulic fluid tank and a fluid cooler incorporated into the hydraulic fluid tank. The fluid cooler includes a vortex chamber having a wall made of a heat conductive material. An inlet is provided to direct incoming pressurized hydraulic fluid tangentially onto the inner surface of the vortex chamber wall to create a swirled flow of hydraulic fluid against the inner surface of the wall. A cooling structure extends from an exterior surface of the vortex chamber wall to promote heat dissipation.

대표청구항 ▼

A convectively-cooled hydraulic fluid tank system comprises a hydraulic fluid tank and a fluid cooler incorporated into the hydraulic fluid tank. The fluid cooler includes a vortex chamber having a wall made of a heat conductive material. An inlet is provided to direct incoming pressurized hydraulic

A convectively-cooled hydraulic fluid tank system comprises a hydraulic fluid tank and a fluid cooler incorporated into the hydraulic fluid tank. The fluid cooler includes a vortex chamber having a wall made of a heat conductive material. An inlet is provided to direct incoming pressurized hydraulic fluid tangentially onto the inner surface of the vortex chamber wall to create a swirled flow of hydraulic fluid against the inner surface of the wall. A cooling structure extends from an exterior surface of the vortex chamber wall to promote heat dissipation. orders of an operating range of said measurement elements, respectively, wherein said maximum and minimum output voltages of said measurement elements are also set to fall between upper and lower failure reference voltage ranges, which are set by an electronic control unit connected to said measurement elements and are provided at upper and lower borders of a power supply voltage applied to said measurement elements, respectively. 2. A method for processing an output of a position measurement sensor according to claim 1, wherein said movable body is a throttle valve that adjusts an amount of intake air supplied to an internal combustion engine, and said electronic control unit detects an abnormality of each said measurement element based on an output voltage of each said measurement element that is outputted while said throttle valve is being returned to an initial throttle valve position within an operating range of said throttle valve. 3. A method for processing an output of a position measurement sensor according to claim 2, wherein if one of said measurement elements is determined to be abnormal by said electronic control unit, other of said measurement elements, which is determined to be normal, is used to resume a drive control operation of said throttle valve. 4. A method for processing an output of a position measurement sensor according to claim 3, wherein a time point of resuming said drive control operation of said throttle valve by said electronic control unit is when a demand for a change in an operating condition of a vehicle is made. 5. A method for processing an output of a position measurement sensor according to claim 2, wherein in said drive control operation of said throttle valve that is carried out when said one of said measurement elements is determined to be abnormal by said electronic control unit, upper protective limits are imposed on a position of said throttle valve and also on a parameter provided for controlling an operating condition of said internal combustion engine, respectively. 6. A method for processing an output of a position measurement sensor according to claim 5, wherein in said drive control operation of said throttle valve that is carried out when said one of said measurement elements is determined to be abnormal by said electronic control unit, if a relationship between said position of said throttle valve and said parameter provided for controlling said operating condition of said internal combustion engine is out of a predetermined range, a power supply to an electric motor that drives said throttle valve to open or close said throttle valve is turned off. 7. An apparatus for processing an output of a redundant position measurement sensor having a couple of non-contacting measurement elements for measuring a position of a movable body, said apparatus further comprising: means for setting maximum and minimum output voltages of said measurement elements, wherein said maximum and minimum output voltages of said measurement elements are set to exceed upper and lower tolerance limits for output voltages of said measurement elements at upper and lower borders of an operating range of said measurement elements, respectively, wherein said maximum and minimum output voltages of said measurement elements are also set to fall between upper and lower failure reference voltage ranges and are provided at upper and lower borders of a power supply voltage applied to said measurement elements, respectively. 8. An apparatus for processing an output of a position measurement sensor according to claim 7, wherein said movable body is a throttle valve that adjusts an amount of intake air supplied to an internal combustion engine, said apparatus further including control means for detecting an abnormality of each said measurement element based on an output voltage of each said measurement element that is outputted while said throttle valve is being returned to an initial throttle valve position w