초록 ▼

A mass fluid flow sensor for determining the amount of fluid inducted into an internal combustion engine, for example, is disclosed. The mass fluid flow sensor includes an external intake fluid temperature element which improves the accuracy of the mass fluid reading. An external cold wire element i

A mass fluid flow sensor for determining the amount of fluid inducted into an internal combustion engine, for example, is disclosed. The mass fluid flow sensor includes an external intake fluid temperature element which improves the accuracy of the mass fluid reading. An external cold wire element is further provided which improves response time. The mass fluid flow sensor has an improved aerodynamic design which provides a lower system pressure drop. Moreover, the sensor is smaller and lighter and has fewer parts, thus providing better manufacturability. A molded one-piece isolated jet nozzle having a hot element disposed therein is included in the fluid sampling portion. The fluid sampling portion has a tubular sampling channel, wherein the sampling channel has one bend having a constant bend radius. Consequently, an improved lower internal flow passage pressure drop is achieved. Additionally, an improved signal to noise ratio, as well as a larger dynamic range is an advantageous consequence of the present invention. The present invention further provides improved electromagnetic interference performance.

대표청구항 ▼

A mass fluid flow sensor for determining the amount of fluid inducted into an internal combustion engine, for example, is disclosed. The mass fluid flow sensor includes an external intake fluid temperature element which improves the accuracy of the mass fluid reading. An external cold wire element i

A mass fluid flow sensor for determining the amount of fluid inducted into an internal combustion engine, for example, is disclosed. The mass fluid flow sensor includes an external intake fluid temperature element which improves the accuracy of the mass fluid reading. An external cold wire element is further provided which improves response time. The mass fluid flow sensor has an improved aerodynamic design which provides a lower system pressure drop. Moreover, the sensor is smaller and lighter and has fewer parts, thus providing better manufacturability. A molded one-piece isolated jet nozzle having a hot element disposed therein is included in the fluid sampling portion. The fluid sampling portion has a tubular sampling channel, wherein the sampling channel has one bend having a constant bend radius. Consequently, an improved lower internal flow passage pressure drop is achieved. Additionally, an improved signal to noise ratio, as well as a larger dynamic range is an advantageous consequence of the present invention. The present invention further provides improved electromagnetic interference performance. e pump and motor are the same component. 13. The apparatus of claim 12 further comprising a valve situated in line with the pump and motor. 14. The apparatus of claim 11 wherein the pump is in line with a heat exchanger. 15. The apparatus of claim 11 further comprising: a. a pressurized fluid supply in line with the motor, whereby fluid output from the fluid supply may drive the motor; b. a valve in line with the motor and fluid supply, wherein the valve regulates fluid output of the fluid supply to the motor. 16. The apparatus of claim 15 further comprising a heat exchanger in line with the pump. 17. The apparatus of claim 16 wherein the heat exchanger and pump are provided in a pump circuit whereby fluid passing through the heat exchanger and pump is recirculated. 18. The apparatus of claim 17 wherein the fluid supply, motor, and valve are provided in a motor circuit whereby fluid passing through the fluid supply, motor, and valve is recirculated. 19. The apparatus of claim 18 wherein the valve is also situated in the pump circuit. 20. The apparatus of claim 16 wherein the valve is also in line with the heat exchanger and pump. ; US-5900027, 19990500, Geihsler et al., 008/094.19R