摘要:
Method for controlling the operation of a pump driven by an electric motor and controlled by a controller, according to which an electronic control module (ECM) sends, to the controller, a PWM (Pulse Width Modulation) control signal having a duty cycle that varies as a function of the desired operating conditions for the pump and according to which the controller acts on the electric motor to apply said operating conditions to the pump.
摘要:
Rotary pump intended to pump a liquid for the pollution control of exhaust gases in a system on board a vehicle and comprising a rotor (4), a stator (5) that are positioned in a casing comprising a wall delimiting a main internal volume and integrating an outlet pipe for the pump, and a pressure sensor (2) which is positioned within the main internal volume of the casing.
摘要:
System for storing an additive solution and injecting it into the exhaust gases of an engine, said system comprising two tanks for storing the solution and one pump for supplying the solution from these tanks to an injection line, these two tanks being in parallel and each being connected to the pump by a branch of a supply line, the branch (I) coming from the first tank (1) giving rise to lower pressure drops than the branch (II) coming from the other tank (2) so that the solution is normally withdrawn mainly from tank (1) and is withdrawn from tank (2), and only from the latter, when tank (1) is non-operational.
摘要:
A urea feed or return line (2) that comprises a hollow coupling (1) enabling it to be connected to a urea tank and that comprises a passage for the urea, this coupling being, in addition, equipped with a heating filament (9), at least one part of which extends freely inside the passage provided for the urea, this part having the shape of a loop or a spiral capable of also extending at least partly into the tank and/or into a tube attached thereto.
摘要:
Method for controlling the operation of a pump driven by an electric motor and controlled by a controller, according to which an electronic control module (ECM) sends, to the controller, a PWM (Pulse Width Modulation) control signal having a duty cycle that varies as a function of the desired operating conditions for the pump and according to which the controller acts on the electric motor to apply said operating conditions to the pump.
摘要:
A system for storing an ammonia precursor, comprising a tank, a filler pipe equipped With an obturator and a ventilation line establishing a direct connection between the filler pipe and a gas discharge duct and also a device designed to specifically open this connection once the obturator starts to be opened.
摘要:
Machine for welding hollow articles and process for welding these articles, for example half-shells of a plastic fuel tank, using the technique of hot-plate welding. A particular process in which the articles to be welded together are preshaped by pressing against a cold plate, which might not be plane, by stretching or compressing the side walls of the articles or by pressing against the walls of a mold. Process applied to the manufacturer of injection-molded/welded fuel tanks. Use of the machine for manufacturing such tanks.
摘要:
A system for storing an internal combustion engine exhaust gas liquid additive, and including a tank for storing the additive, the tank including two halve shells manufactured as two separate parts that are assembled, at least one of the shells including an active component fixed inside of it.
摘要:
A method for regulating a motor-driven pump of an SCR system, the pump delivering a pressure, being subjected to a hydraulic torque in relation to this pressure and also to a resistive torque and being driven by an electric motor including coils supplied with a current and developing a torque in relation to this current, according to which to regulate the pump, use is made of a mechanism to measure the current in the coils of the motor, of a regulator of overall current consumed by the motor, and of a model of the relation between the current and the pressure using an estimate of part of the resistive torque, namely the dry frictions, obtained by rotating the pump under no-load conditions at different speeds and by measuring the associated current.
摘要:
A method for detecting whether an injector with a valve controlled by a PWM signal of an SCR system is at least partially clogged, the system including a pump, or a positive-displacement pump, driven by a motor and pressure of which is controlled by a controller that continuously measures the pressure and/or another parameter characteristic of energy transmitted by the motor to the pump. According to the method, during normal operation of the SCR system, specific portions of one of the measurements are compared with equivalent portions stored in a memory.