173results about "Fuel injection with sensors" patented technology

Fuel injectors (10) for internal combustion engines are modified and equipped with fiber optic fuel pressure sensors (12) and fiber optic combustion pressure sensors (14). The combustion pressure sensors (14) are located in separate channels (26) formed in the fuel injectors with the lower portion (22) of the channels leading to the combustion chambers. Above the combustion pressure sensors (14) are fiber optic leads (24). In the preferred embodiments the sensors (46) are equipped with diaphragms (40) of novel shape (48) and employ multiple pairs of fibers (86, 88), temperature sensitive components (72, 74, 126) and novel compensation and status monitoring circuits (FIGS. 6, 9, 10, 14, 15, 18).

To obtain a small and high performance damper mechanism which reduces pressure pulsation in low pressure-side fuel in the high pressure fuel pump in a high pressure fuel supply system or a high pressure fuel pump provided with the small and high performance damper mechanism.Two metal diaphragms are welded together over the entire circumference to obtain a metal diaphragm assembly (also referred to as “double metal diaphragm damper”). The whole or part of the portion of the metal diaphragm assembly other than the weld (for example, the portion inside the weld) is clamped by a pressing member and thereby the assembly is secured in a housing enclosure. The housing enclosure may be formed integrally with the body of a high pressure pump.

A fuel injector for an internal combustion engine, the fuel injector comprising an injector body, a fuel supply passage defined in the injector body, the fuel supply passage containing fuel under high pressure in use of the injector, a pressure sensor for measuring the pressure of fuel in the passage in use, wherein the pressure sensor is situated within the injector body and is separated from fuel in the passage in use, and a method of fuel injection, comprising constructing an hydraulic behavior profile by fuel pressure measurement, using the hydraulic behavior profile to predict fuel pressure that will prevail in a fuel injector during an injection event, and supplying a control signal to the fuel injector to control the amount of fuel injected during the injection event in accordance with the predicted fuel pressure. By predicting the fuel pressure that will prevail during an injection event, the fuel delivered during the injection event can be accurately controlled.

A fuel supply apparatus for an engine in which calculation of a manipulated variable of a fuel pump in response to a deviation between a fuel pressure detected by a fuel pressure sensor and a target value is carried out, is configured in a manner such that when the fuel pressure sensor is failed, a change in the fuel pressure is estimated based on a required fuel flow amount of an engine, a discharge amount of the fuel pump and a fuel pressure detected immediately before the fuel pressure sensor is failed, so that deciding of the manipulated variable of the fuel pump is made, based on the estimation value. A method of controlling the fuel supply apparatus to realize the controlling of the fuel pump based on the manipulated variable is also disclosed.

A diesel engine coupled to a transmission and having a fuel injector control system which among other things monitors the load on the engine by measuring the transmission line pressure, a higher pressure being indicative of a greater load. When the pressure is below a preset value and the engine is sufficiently warm, the normal injector firing sequence is altered by not actuating injectors at spaced intervals in the firing sequence. As the pressure and therefore the load decreases, the intervals between which injectors are not actuated are decreased so that in a given number of engine rotations there are fewer injector actuations and as a result of corresponding cylinders being idle, less fuel is supplied to the engine at lighter loads.

A fuel injection system (1) with at least one fuel injector (1a) and a heatable adapter (1b), which is connected to a fuel rail (1c) and to the fuel injector (1a) of the fuel injection system (1); a thermoswitch (2) is provided in the fuel rail (1c), which is connected with an external door contact switch (3) and with the heatable adapter (1b). The thermoswitch (2) includes a thermosensor, so that a reliable cold start is ensured by the fact that, when a previously specified fuel temperature is fallen below, the thermoswitch (2) switches over and causes fuel (8) to be heated.