PISTON PUMP AND RELATIVE CONTROL METHOD
    2.
    发明申请

    公开(公告)号:US20190301438A1

    公开(公告)日:2019-10-03

    申请号:US16368958

    申请日:2019-03-29

    IPC分类号: F04B7/00 F04B17/03 F04B49/06

    摘要: A piston pump for feeding a liquid in a vehicle having at least one piston, which is configured to cyclically slide inside a housing between a top dead centre and a bottom dead centre. The liquid is usually fed along a main feeding direction from a suction duct to a delivery duct. The piston pump has two solenoid valves, which are each arranged in the suction duct and in the delivery duct, respectively, and are designed to be operated by an electronic control unit so as to reverse the liquid feeding direction from the main feeding direction to a secondary feeding direction opposite the main liquid feeding direction and/or so as to adjust the cylinder capacity of the piston pump. The piston is operated by an electromechanical actuator, in particular comprising an electromagnet.

    DEVICE TO SUPPLY AN INTERNAL COMBUSTION ENGINE WITH WATER COMING FROM A TANK OF AN EXHAUST SYSTEM PROVIDED WITH EXHAUST GAS AFTER-TREATMENT

    公开(公告)号:US20190170036A1

    公开(公告)日:2019-06-06

    申请号:US16177595

    申请日:2018-11-01

    IPC分类号: F01N3/20

    摘要: A device to supply an internal combustion engine with water comprising one single tank of an exhaust system provided with exhaust gas after-treatment; the tank is divided, on the inside, into a first powder urea storage area and a second water collecting area, and wherein the powder urea and the water are mixed inside the tank so as to obtain a water solution of urea with a variable concentration, the device comprises at least one second electromagnetic injector, which is designed to inject water into the internal combustion engine, and a second pumping device, which is drowned inside the tank and draws from the second water collecting area in order to supply water under pressure to said at least one second electromagnetic injector.

    Method and apparatus to supply water to a tank of an exhaust system provided with exhaust gas after-treatment for a combustion engine

    公开(公告)号:US10738675B2

    公开(公告)日:2020-08-11

    申请号:US15912737

    申请日:2018-03-06

    IPC分类号: F01N3/20

    摘要: An exhaust system provided with exhaust gas after-treatment for a combustion engine comprising an exhaust pipe and a pumping device, which is buried inside the tank, from which it draws so as to feed a water solution of urea under pressure to an electromagnetic injector; the tank is supplied with urea powder and water, which are mixed on the inside so as to obtain a water solution of urea with a variable concentration; and a water supply circuit to supply water to the tank, which is provided with a first pipe, which draws the water from a basin and is regulated by a first valve, which allows water to be introduced into the tank, if necessary, or to be drained to the surrounding environment when the water quantity already contained in the tank is sufficient.