98results about "Fuel-injection pumps" patented technology

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.

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 utility model relates to a large speed regulating system for a marine diesel engine, which realizes accurate control of the rotating speed of the diesel engine through components such as a speed regulating controller, an electro-hydraulic control mechanism, a speed setting device, a fly ball, a slide valve mechanism, a prompt drop mechanism, a compensation mechanism, a slide valve core, a power output oil cylinder and a rotating speed sensor. According to the system, under the condition that the electro-hydraulic control mechanism loses power, the rotating speed can be sensed and adjusted through the sliding valve mechanism, the compensation mechanism and the prompt drop mechanism. In addition, the system further comprises a power output oil cylinder which is used for amplifying various adjusting signals of the speed regulator and finally outputting angular displacement. The system can be automatically switched between an electro-hydraulic mode and a mechanical hydraulic mode, and it is ensured that the diesel engine works at the stable rotating speed.

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 fuel system for an internal combustion engine includes a low-pressure fuel pump and a pressure control valve. The pressure control valve is located at the inlet of the low-pressure fuel pump to regulate the fuel pressure and flow in the system.

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.

The utility model discloses a high-pressure plunger distribution pump of a diesel engine, which relates to the technical field of high-pressure plunger distribution pump structures, and aims to solve the problem of improving the quality of oil injection by removing moisture in diesel oil, and adopts the technical scheme that the high-pressure plunger distribution pump is characterized in that a fixed mounting seat is arranged at the front end of a distribution pump outer shell; a distribution chamber is arranged at the rear end of the distribution pump outer shell, a sealing seat is installed on one side of the distribution chamber, an electromagnetic control valve is installed on one side of the sealing seat, a transmission shaft is installed at one end of the distribution pump outer shell, and an adjusting seat is arranged on one side of the upper end of the distribution pump outer shell. A speed regulating gear is arranged in the distribution pump outer shell, an oil inlet seat is arranged above the distribution pump outer shell, an oil-water separator is installed on one side of the distribution pump outer shell, and a high-pressure plunger pump is installed below the speed regulating gear.

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.

The utility model provides an accelerator speed regulating mechanism, which comprises a mounting plate, an accelerator speed regulating mechanism and an accelerator speed regulating mechanism, the control mechanism comprises a handle, a speed regulating arm and a tension spring, the handle and the speed regulating arm are rotatably connected with the mounting plate, the tension spring is connected with the handle and the speed regulating arm, and rotation of the speed regulating arm is used for adjusting the oil supply amount of the oil injection pump; the limiting mechanism elastically abuts against the end, away from the tension spring, of the speed adjusting arm so as to limit the rotating angle of the speed adjusting arm. According to the accelerator speed regulation mechanism, the speed regulation arm is effectively prevented from exceeding the maximum rotation angle to limit the maximum rotation speed through elastic abutting of the limiting mechanism, an engine and other related parts are protected against overspeed damage, the smoother and more continuous regulation effect is provided, and speed regulation is more accurate.

The invention provides an oil adjusting device and a diesel engine. The oil adjusting device comprises a rocker arm assembly, a connecting rod, a first torsional spring and a second torsional spring. The rocker arm assembly rotationally sleeves the oil adjusting rod, and the two ends of the connecting rod are rotationally connected with the rocker arm assembly and the rack correspondingly. The first torsion spring and the second torsion spring are both arranged on the oil adjusting rod in a sleeving mode and are arranged on the two sides of the rocker arm assembly respectively; the far end of each torsional spring is fixedly connected with the oil adjusting rod, and the near end of each torsional spring abuts against the rocker arm assembly. The first torsion spring applies acting force moving in the oil mass increasing direction to the rack through the rocker arm assembly, and the second torsion spring applies acting force moving in the oil mass reducing direction to the rack through the rocker arm assembly. Due to the fact that the oil adjusting rod is elastically connected with the rocker arm assembly through the first torsion spring and the second torsion spring, when a rack of a certain oil injection pump is stuck, the torsional deformation of all the torsion springs can be changed to replace the moving stroke of the stuck rack, smooth rotation of the oil adjusting rod is guaranteed, and then normal oil adding and reducing actions of other normal racks are guaranteed.

The utility model provides an engine which comprises an output component and a speed regulating component. The output component comprises a cylinder head, a cylinder body communicated with the cylinder head, a piston assembly installed in the cylinder body, a crankshaft in transmission connection with the piston assembly and a cam shaft in transmission connection with the crankshaft, and the cam shaft is installed in the cylinder body. The speed regulation component comprises a control mechanism, the control mechanism comprises a mounting plate mounted on the cylinder body, a control handle rotationally mounted on the mounting plate, a shifting fork shaft in transmission connection with the control handle and a shifting fork fixedly mounted on the shifting fork shaft, the shifting fork is connected with an oil injection pump, the oil injection pump is mounted on the cylinder body, and the control handle is rotationally mounted on the mounting plate. And one end of the spring is propped against the cam of the cam shaft. According to the engine, the shifting fork shaft is driven to rotate through the control handle, so that the shifting fork is driven to adjust the oil supply amount of the oil injection pump, throttle control of the engine is achieved, complexity of a system is simplified, cost is low, and maintenance and replacement are simpler.

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 disclosure provides a control device for an internal combustion engine which is capable of reducing an overshoot of a fuel pressure in a common rail with respect to a target pressure. A control device 100 for the internal combustion engine includes an amount-of-injection control unit 110, and a pressure control unit 120. The pressure control unit 120 includes a feedback control unit 121, a discharge flow rate calculation unit 122, a discharge flow rate restricting unit 123, and an energization start angle calculation unit 124. The feedback control unit 121 calculates a target discharge flow rate FRt of a fuel discharged from a high-pressure fuel pump to a common rail, based on the pressure deviation ΔP between a fuel pressure Pf and a target pressure Pt. The discharge flow rate calculation unit 122 calculates a balanced discharge flow rate FRb by increasing or decreasing the target discharge flow rate FRt such that the target discharge flow rate FRt is balanced with the flow rate of the fuel flowed out from the common rail by being injected through injectors. The discharge flow rate restricting unit 123 outputs the restricted discharge flow rate FRr having its upper limit corresponding to the balanced discharge flow rate FRb, based on the pressure deviation ΔP. The energization start angle calculation unit 124 calculates an energization start angle θes, which is a phase angle of the reciprocating motion of a plunger at the start of energization of the electromagnetic valve in the high-pressure fuel pump, based on the restricted discharge flow rate FRr.

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