61results about "Fuel-injection pumps" patented technology

An ignition system (10) including an injection member (20) configured to deliver fuel to an ignition zone (140) within a combustion chamber, an ignition element (40) configured to ignite fuel within the ignition zone, and a control unit (60) configured to operate the injection member and the ignition element in a first ignition phase including ignition of a first delivery of fuel provided to the combustion chamber by the injection member and a second ignition phase including ignition of a second delivery of fuel provided to the combustion chamber by the injection member.

A method for defining cylinder torque demand during transitions in skip-fire engine operation of a combustion engine having a number N of cylinders, the method comprising: firing the engine in first cycles of a first pattern of N events, that defines for each cylinder of the engine a fire or skip fire event in one cycle of the first cycles, with a first fuel quantity for each fire event in the first cycle; transitioning the engine to firing the engine in second cycles of a second pattern of N events of fire and skip fire events for each cylinder, with a second fuel quantity for each fire event in the second cycle; carrying out one or more transitioning fire events, in transitioning from the first to the second pattern, with a dynamic fuel quantity, to compensate for torque loss of a preceding or succeeding skip fire event of said fire event, wherein the adjustment differs from the first and / or second fuel quantity.

A method of determining fuel leak of fuel injectors 2a, 2b of an injection system of a combustion engine, said method comprising determining a baseline pressure based on a predetermined integral response threshold and for each fuel injector 2a, 2b determine a primary reference integral response by fluidly isolating the respective fuel injector 2a, 2b and obtaining the associated primary reference integral response by obtaining the current integral response while running the engine at the baseline pressure with the respective fuel injector 2a, 2b fluidly isolated.

An ignition system including an injection member configured to deliver fuel to an ignition zone within a combustion chamber, an ignition element configured to ignite fuel within the ignition zone, and a control unit configured to operate the injection member and the ignition element in a first ignition phase including ignition of a first delivery of fuel provided to the combustion chamber by the injection member and a second ignition phase including ignition of a second delivery of fuel provided to the combustion chamber by the injection member.

The objective is to provide a control device for an internal combustion engine that can adjust the amount of fuel injected. [Solution] A control device for an internal combustion engine comprising: an injection control unit that controls a first fuel injection valve provided in the cylinder of the internal combustion engine; a prediction unit that predicts the load ratio of the internal combustion engine; and a setting unit that determines the required amount of fuel injection based on the predicted load ratio, wherein if the predicted load ratio is greater than the actual load ratio, the injection control unit injects a first amount less than the required amount from the first fuel injection valve.

At least some embodiments of the present disclosure relate to a fuel injection timing drift detection and / or compensation system. In some cases, the system collects or receives a series of fuel pressure data measured by one or more fuel pressure sensors. The system is configured to receive an indication of a fuel flow cut-off and an injection start command signal. The system uses the series of fuel pressure data to calculate a set of pressure drops and identify a selected pressure drop that is greater than a predetermined threshold to determine a measured injection start timing based on the selected pressure drop. The system is also configured to evaluate whether a fuel injection drift occurred based on the received injection start command signal and the measured injection start timing. In some cases, the fuel injection drift is used to compensate for fuel injection timing or raise a flag indicating a drift.

A method for controlling air and fuel supply to an engine of a machine includes: detecting, by a processing circuit, a change in a loading condition on the engine of the machine based on use of an implement system of the machine; and providing, by the processing circuit, a command to (i) a fueling system of the machine to increase an amount of fuel provided to the engine by the fueling system and (ii) an air handling system of the machine to increase at least one of (a) an amount of air or (b) a boost pressure of the air provided to the engine by the air handling system in response to an increase in the loading condition.

The present invention relates to an adaptive high pressure fuel pump system and a method of predicting pumped quantity. There is provided a method of predicting a quantity of fuel ("Q pump ") pumped by a pump during a pumping event to a fuel accumulator to control operation of the pump, the method comprising: generating a model of operation of the pump, generating the model of operation of the pump comprising: estimating a start of pumping ("SOP") position of a plunger of the pump, estimating Q pump , determining a converged value of the estimated SOP position and determining a converged value of the estimated Q pump ; predicting Q pump using the model by inputting the converged value of the estimated SOP position, a measured fuel pressure in the fuel accumulator and a measured fuel temperature in the fuel accumulator to the model; and controlling operation of the pump in response to the predicted Q pump .

A control system for an internal combustion engine includes at least one sensor configured to measure a combustion signal within at least one cylinder of a plurality of cylinders within the internal combustion engine. The combustion signal corresponds to a first combustion cycle. The control system also includes a controller operably connected to the at least one sensor. The controller is configured to receive the combustion signal from the at least one sensor and determine whether the measured combustion signal satisfies at least one condition associated with the internal combustion engine. The at least one condition corresponds to the at least one of engine misfire or delayed combustion. The controller is further configured to, based on the determination, reduce a fueling amount to the at least one cylinder for a predetermined number of combustion cycles following the first combustion cycle.

The invention provides a control device for an internal combustion engine. Wherein the processing circuit is configured so as to execute: a first process for calculating an imbalance index value indicating the degree of variation in the air-fuel ratio between the plurality of cylinders, and a second process for calculating an imbalance index value indicating the degree of variation in the air-fuel ratio between the plurality of cylinders; a second process of calculating a target air-fuel ratio by correcting the reference air-fuel ratio with the imbalance index value; a third process in which fuel in an amount corresponding to the target air-fuel ratio is injected from the fuel injection valve; and a fourth process for stopping the operation of the internal combustion engine when the stop condition is satisfied. The processing circuit is configured so as to repeat the first to third processes without stopping the operation of the internal combustion engine until an end condition is satisfied, even if a stop condition is satisfied, when a continuation condition indicating a symptom of an abnormality related to a deviation in the air-fuel ratio between the plurality of cylinders is satisfied.

The utility model discloses a respirator with an oil baffle cover for a fuel injection pump speed regulator, which relates to the field of respirator structures and comprises a respirator body, a mounting groove coaxially arranged at the top of the respirator body, a vent hole coaxially penetrating through the respirator body and connected with the mounting groove, and a blank cap arranged in the mounting groove. The respirator further comprises an oil blocking cover which is coaxially arranged at the bottom of the respirator body, and the two communicating grooves are symmetrically formed in the two ends of the oil blocking cover and connected with the vent hole. The breather is effectively prevented from leaking oil by improving the structure of the vent hole and adding the oil baffle cover.

The present application provides a kind of pressure regulating system of fuel injection pump, pressure regulating system includes nozzle connecting pipe, connecting cavity, solenoid valve, pump base, pump base is connected nozzle connecting pipe through connecting cavity above, solenoid valve is arranged in one side of connecting cavity, the center of pump base is equipped with cavity, cavity is also equipped with liquid inlet pipeline and liquid outlet pipeline below, the output end of cavity is communicated with a shunt passage, shunt passage flows out in two sections, the size of the force of tightening of adjusting seat is adjusted by external tool, so as to adjust spring stretch or compression, when adjusting seat is loosened, spring stretch, copper plug head is extruded to containing chamber, oil in containing chamber is extruded, so that the internal pressure of solenoid valve connected with upper portion becomes larger, finally nozzle connecting pipe pressure becomes larger, when tightening adjusting seat, spring compression, copper plug head is removed from containing chamber, the pressure of oil in containing chamber is reduced, so that the internal pressure of solenoid valve connected with upper portion becomes smaller, finally nozzle connecting pipe pressure becomes smaller.

Method for controlling fuel injection of a direct injection fuel system, wherein the direct injection fuel system comprises a fuel pump (202, 206) and several fuel injectors (214a, 214b, 214c, 214d), the method comprising: Variable operation of the fuel pump (202, 206) to maintain a fuel pressure at a selected pressure; Temporarily increasing the pump operation to raise the pressure sufficiently above the selected pressure, and then reducing the pump operation; During at least one fuel injection following the reduction of pump operation: Correlation of the fuel pressure drop during the at least one fuel injection with a fuel injector operation, wherein a predetermined number of fuel injections for each fuel injector (214a, 214b, 214c, 214d) in an engine (10) is performed following and near the reduction of pump operation, and Adjusting the fuel injector operation based on correlation.

A system includes; a hydrogen internal combustion engine configured to produce exhaust; an aftertreatment system in exhaust receiving communication with the hydrogen internal combustion engine, the aftertreatment system comprising a catalyst member; a sensor coupled to the aftertreatment system; and a controller configured to: receive, from the sensor, data corresponding to a characteristic of the aftertreatment system, determine, based on the characteristic, a performance value corresponding to the catalyst member, compare the performance value to a threshold, cause the hydrogen internal combustion engine to operate in a first engine operating mode when the performance value does not exceed the threshold, and cause the hydrogen internal combustion engine to operate in a second engine operating mode when the performance value exceeds the threshold.

When an accelerator opening degree decreases to be lower than a predetermined accelerator determination opening degree, a control device implements a fuel cut that stops fuel injection by an injector; and in implementation of fuel cut, when a catalyst temperature is high, the control device implements an intake air amount increase control to control an intake air amount adjustment device so that an intake air amount is larger than when a catalyst temperature is low, and in implementation of the intake air amount increase control, when a brake sensor detects that a brake is in operation, the control device controls the intake air amount adjustment device so that the intake air amount becomes larger than when the brake sensor detects that the brake is in non-operation.

Aspects of the present disclosure relate to an electric or hybrid vehicle. Aspects of the vehicle may be used to provide a variety of functionality, including power exporting and aggregation, power take off functionality, thermal signature reduction, and improved vehicle longevity, vehicle turning, and vehicle control techniques.

When an accelerator opening degree decreases to be lower than a predetermined accelerator determination opening degree, a control device implements a fuel cut that stops fuel injection by a fuel supply device 11; and in implementation of fuel cut, when a catalyst temperature obtained by a catalyst temperature obtaining device is high, the control device implements an intake air amount increase control to control an intake air amount adjustment device 22 so that an intake air amount is larger than when a catalyst temperature is low, and in implementation of the intake air amount increase control, when a brake operation state detection device detects that a brake 81 is in operation, the control device controls the intake air amount adjustment device 22 so that the intake air amount becomes larger than when a brake operation state detection device detects that the brake 81 is in non-operation.

The present invention addresses the problem of providing a control device for an internal combustion engine capable of adjusting the amount of fuel injection. A control device for an internal combustion engine is provided with: an injection control unit that controls a first fuel injection valve provided in a cylinder of the internal combustion engine; a prediction unit that predicts the load rate of the internal combustion engine; and a setting unit that determines a required amount of fuel injection amount on the basis of the predicted load rate, and when the predicted load rate is greater than an actual load rate, the injection control unit performs injection of a first amount less than the required amount from the first fuel injection valve.

The present invention relates to a method for controlling a high-pressure pump of an injection system for an internal combustion engine, a computing unit and a computer program for carrying out the method, as well as an injection system and an internal combustion engine. The method comprises the steps of determining a quantity of fuel to be supplied to the high-pressure accumulator (16); comparing the quantity of fuel to be supplied to the high-pressure accumulator (16) with a maximum delivery rate of a single delivery unit (50, 50') of the high-pressure pump (15); and supplying the fuel to the high-pressure accumulator (18) with only one delivery unit (50, 50') of the high-pressure pump (15) when a difference between the quantity of fuel to be supplied to the high-pressure accumulator (18) and the maximum delivery rate of a single delivery unit (50, 50') is less than or equal to a predetermined value.

A system and process for operating an internal combustion engine includes a fuel injector connected to a fuel rail, which injects fuel during an engine cycle. A high-pressure pump is connected to the fuel rail and includes pump elements that pressurize the fuel, as well as discrete-flow inlet metering valves that control the fuel flow from the pump elements. The fuel flow from the high-pressure pump's pump elements to the fuel rail is interrupted by the discrete-flow inlet metering valves during a portion of the engine cycle to obtain fuel pressure readings from the fuel rail during fuel injection.

To provide an engine control device capable of suppressing deterioration of deceleration feeling while preventing excessive temperature rise of a catalyst device.SOLUTION: When the accelerator opening degree decreases to less than a predetermined accelerator determination opening degree, execute a fuel cut for stopping fuel injection by the fuel supply device 11, and when the fuel cut is executed, execute intake air amount increase control for controlling the intake air amount adjusting device 22 such that the intake air amount is larger when the catalyst temperature specified by the catalyst temperature specifying device is high than when the catalyst temperature is low; When it is detected by the brake operation state detection device that the brake is operated during execution of the intake air amount increase control, the intake air amount adjustment device is controlled so that the intake air amount is larger than that when it is detected that the brake is not operated.SELECTED DRAWING: Figure 1

To provide a fuel supply device capable of determining whether a fuel pressure sensor is normal or not when the operation of an internal combustion engine is stopped.SOLUTION: When the operation of an internal combustion engine is stopped, a processing circuit 71 of a fuel supply device 20 opens a relief valve 52 by increasing the fuel pressure in a high-pressure delivery pipe 30 until the fuel pressure reaches or exceeds a specified pressure prior to stopping the operation of the internal combustion engine. After the fuel pressure in the high-pressure delivery pipe 30 begins to decrease due to the relief valve 52 being opened, the processing circuit 71 determines whether a fuel pressure sensor 62 is normal or not on the basis of the comparison result between the delivery fuel pressure and a fuel pressure determination value.SELECTED DRAWING: Figure 2

The invention is a CO2 capture system comprising the following features: - a CO2 rich exhaust gas (6g) from an external first source (6s) to the inlet (6) of a compressor (2); and a first CO2 rich gas (6r) compressed at high pressure (P) reaches a manifold (8) to one or more outlets (5) of a housing (10) enclosing at least part of a combustion chamber (11) having a wall (11w), - wherein the combustion chamber (11) comprises a burner (13) arranged to combust fuel (14f) and compressed air (15c) supplied from a fuel line (14) and an air supply pipe (15) respectively at high pressure (P) to form a second CO2 rich gas (15r), - wherein a slit (12) is provided in the wall (11w) in the combustion chamber (11) for the compressed CO2 rich gas (6r) to enter to mix with the other CO2 rich gas (15r) formed in the combustion chamber (11) and cool to a third CO2 rich exhaust gas (60r); - a heat exchanger (16) arranged to operate at high pressure (P) and to exchange heat from the hot CO2 rich exhaust gas (60r) from the combustion chamber (11) with a returning CO2 lean exhaust gas (60L) from a CO2 extraction device (100) mainly at high pressure (P), - wherein the returning, now heated, CO2 lean exhaust gas (60L) is returned via a manifold (9) to an expander (3) and discharged via an outlet (7), the expander driving the compressor (2) and the CO2 extraction device (100).

The purpose of this invention is to provide a piston-type booster pump and a fuel injection system based on a dual-solenoid valve booster pump with a flexible and variable injection pattern, belonging to the field of engine technology. Fuel is pressurized by an electronically controlled unit pump and enters the high-pressure common rail. The piston-type booster pump can further pressurize the pressurized fuel, thereby changing the injection pressure of the injector and achieving a variable fuel injection pattern. When only one booster pump solenoid valve is open, the piston-type booster pump has a long booster response time and a slow increase in injection rate. When both booster pump solenoid valves are open simultaneously, the piston-type booster pump has a short booster response time and a fast increase in injection rate. The electronic control unit achieves flexible control of the injection pattern by coordinating the opening and closing sequence of the two booster pump solenoid valves, the electronically controlled unit pump solenoid valve, and the injector solenoid valve.

The present invention relates to a spring-return type actuator provided with a speed reduction gear unit. According to an embodiment of the present invention, disclosed is a spring-return type actuator in which, when power supply is interrupted, a driving shaft is automatically rotated and restored by a reel spring to drive objects to be controlled, such as valves and dampers. The spring-return type actuator is provided with the speed reduction gear unit, which provides a torque boosting function, separate from a planetary gear system that provides an operation control function for the restoring rotation, thus making it possible to provide a large force required for the restoring rotation of a large-capacity valve or damper without excessively increasing the number of turns of the reel spring.

The utility model discloses a multi-spring opposed type speed stabilizing device and a traveling block prevention fuel injection pump assembly, and belongs to a diesel engine fuel injection device. The multi-spring opposed type speed stabilizing device comprises a speed adjusting rod, a sliding block, a flywheel, speed adjusting springs, a buffering assembly and a speed adjusting arm. The speed regulation spring provides first thrust for the speed regulation rod, at least one of the first buffer spring and the second buffer spring can provide second thrust opposite to the first thrust in direction, the situation that force generated by the buffer assembly and pre-tightening force of the speed regulation spring are in the same direction is avoided, therefore, the rotating speed of the diesel engine can be fast and stable, and the occurrence rate of traveling block faults is reduced. The utility model further discloses a traveling block prevention fuel injection pump assembly which comprises an upper pump body, a lower pump body, a base, an oil inlet valve, an oil outlet valve, a plunger pump and the multi-spring oppositely-arranged type speed stabilizing device.

Control device (90) for a fuel injection system (10), wherein the fuel injection system comprises: a low-pressure pump (20) configured to compress a fuel in a fuel tank (18) and deliver the fuel; a high-pressure pump (30) configured to increase the pressure of the fuel delivered by the low-pressure pump and to deliver high-pressure fuel; a storage tank (60) configured to store the high-pressure fuel delivered by the high-pressure pump; a fuel injector (62) configured to inject the high-pressure fuel contained in the reservoir; a relief valve (80) provided in a high-pressure section (44, 60) downstream of the high-pressure pump and configured to open when a high-pressure anomaly occurs in the high-pressure section; and a return line (45) which is configured such that it returns the high-pressure fuel in the high-pressure section to a low-pressure section provided downstream of the low-pressure pump by opening the relief valve, wherein the control device is configured to control the high-pressure fuel in the storage tank within a predetermined pressure range, wherein the control device comprises: a fuel pressure determining unit configured to determine whether the pressure in the high-pressure section rises to a predetermined determining pressure that is higher than the pressure range and lower than a valve opening pressure for opening the relief valve; and a restriction unit configured to cause the low-pressure pump to implement a fuel delivery restriction when the fuel pressure determination unit determines that the pressure in the high-pressure section is rising to the determination pressure.

Processing circuitry is configured to execute a first process that calculates an imbalance index value indicating a degree of variation in air-fuel ratios across multiple cylinders, a second process that calculates a target air-fuel ratio by correcting a reference air-fuel ratio based on the imbalance index value, a third process that causes fuel injection valves to inject fuel in an amount corresponding to the target air-fuel ratio, and a fourth process that stops the operation of the internal combustion engine when a stop condition is met. The processing circuitry is configured to repeat, when a continuation condition is met, the first to third processes without stopping the operation of the internal combustion engine until a termination condition is met even if the stop condition is met. The continuation condition is a condition indicating a sign of an anomaly related to variations in air-fuel ratios across the cylinders.

The purpose of the present invention is to accurately detect the operating state of a movable element of an electromagnetic actuator. A control device (10) is a device for controlling an electromagnetic actuator (200) having a stator (206), a coil (205), and a movable element (204) that operates on the basis of a current supplied to the coil (205). A control device (10) is provided with: an energizing unit (11) that switches energization to a coil (205) and supplies a switching current to the coil (205); and a switching detection unit (13) that detects the increase and decrease in the switching current. A switching state calculation unit (14) that calculates a ratio (T1 / T2) between the rise time (T1) and the fall time (T2); a switch state change detection unit (15) that detects a change in the calculated ratio; and an operation state detection unit (16) that detects the operation state of the movable element (204) on the basis of the detected change in the ratio.

The present invention addresses the problem of providing a fuel supply system in which the flow rate of fuel supplied to a port injection valve is stable. A fuel supply system is provided with: a first low-pressure fuel pump and a second low-pressure fuel pump which are provided in a fuel tank and pressurize fuel in the fuel tank; a low-pressure fuel passage for supplying fuel pressurized by the first low-pressure fuel pump and the second low-pressure fuel pump to a port injection valve of an engine; a high-pressure fuel pump which further pressurizes the fuel supplied from the low-pressure fuel passage and supplies the pressurized fuel to an in-cylinder injection valve of the engine; and a control device that controls the first low-pressure fuel pump and the second low-pressure fuel pump such that the fuel discharge flow rate of each of the first low-pressure fuel pump and the second low-pressure fuel pump becomes a first target discharge flow rate and a second target discharge flow rate.