4 results about "Pressure range" patented technology

Providing an injector driving control apparatus that operates with minimum power consumption while ensuring linearity (proportionality between the current supply duration and fuel injection volume of the injector) in a wide fuel pressure range. Providing a coil current feedback circuit and controlling the current feedback duration according to fuel pressure after applying the current at a boost voltage. The present invention enables optimal control of the injector and hence, the improvement of its fuel injection volume characteristics (linearity) and the reduction of the heat generated in the injector driving control circuits.

The invention discloses an exhaust gas treatment device of a metal organic chemical vapor deposition apparatus and application of the exhaust gas treatment device. The exhaust gas treatment device comprises an air inlet unit, an absorption unit, a monitor unit and a control unit, wherein the air inlet unit is used for inputting to-be-treated exhaust gas, the absorption unit is provided with a gasexhaust mouth, and is connected with the air inlet unit, and an absorption liquid for absorbing the to-be-treated exhaust gas is arranged in the absorption unit; the monitor unit is used for monitoring parameters of the absorption liquid in the absorption unit and outputting the parameters to the monitor unit, the parameters include the pH value, the ORP value and/or the temperature, and the control unit is used for controlling a servo component in the exhaust gas treatment device according to the parameter values and other signals which are output by the monitor unit, so that the corresponding parameters of the absorption liquid are adjusted. The treatment capability of the device is improved greatly, exhaust gas treatment of at most ten MOCVD devices can be met at the same time, the negative pressure is controlled by Venturi and a fan at the same time, and a wide negative pressure range and high accuracy are achieved.