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公开(公告)号：US11486324B2
公开(公告)日：2022-11-01
申请号：US17284972
申请日：2019-09-19
申请人： Hitachi Astemo, Ltd.
发明人： Yuta Mifune , Koichi Tsukio
摘要： A drive circuit is controlled when power is interrupted. When power is turned off, a main power supply is switched to a sub-power supply, and a residual charge of a step-up circuit is lowered to a drive voltage of a drive circuit using a step-down circuit is used as the sub-power supply.
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2.发明授权公开(公告)号：US11480129B2
公开(公告)日：2022-10-25
申请号：US17180185
申请日：2021-02-19
申请人： Caterpillar Inc.
发明人： Adam Charles Hill
摘要： A fuel system includes a fuel injector, and a fueling control unit electrically connected to a solenoid actuator in the fuel injector. The fueling control unit is structured to energize and deenergize the solenoid actuator to lift and return an armature coupled with an injection control valve. The fueling control unit also reenergizes the solenoid actuator with an armature retarding current while the armature is in flight to stabilize closing of the injection control valve. The armature retarding current can be used to electronically trim the fuel injector to limit an error in a quantity of injected fuel.
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公开(公告)号：US11466653B2
公开(公告)日：2022-10-11
申请号：US17104784
申请日：2020-11-25
申请人： DENSO CORPORATION
发明人： Keisuke Yanoto
摘要： A control device controls a drive current that flows through a drive coil of a fuel injection valve that is electromagnetically driven. A control device includes a determination unit configured to determine whether a supply fuel pressure, which is a pressure of fuel supplied to the fuel injection valve, is higher than a determination pressure at which the fuel pressure is determined abnormally high; a first control unit configured to control the drive current in a first mode when the determination unit determines that the supply fuel pressure is not higher than the determination pressure; and a second control unit configured to control the drive current in a second mode that facilitates maintaining of the fuel injection valve in an open state more than in the first mode when the determination unit determines that the supply fuel pressure is higher than the determination pressure.
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公开(公告)号：US11459969B2
公开(公告)日：2022-10-04
申请号：US17286893
申请日：2019-10-22
发明人： Cedrick Biellmann , Thierry Bavois
摘要： Disclosed is a method for controlling a DC/DC voltage converter for controlling the current of at least one fuel injector of an internal combustion engine of a motor vehicle, the vehicle including a supply battery and the converter including a coil and a switch. The method includes the steps of measuring the value of the voltage delivered by the battery, of determining a threshold value of the current passing through the coil from the measured value of the voltage and from a predetermined curve of the current as a function of the voltage, and of actuating the opening of the switch when the current passing through the coil reaches the determined threshold value of the current in order to regulate the power of the converter.
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公开(公告)号：US20220298989A1
公开(公告)日：2022-09-22
申请号：US17806484
申请日：2022-06-11
发明人： Peter Senft
摘要： A method for injecting a predetermined total fuel quantity via multiple injections using a fuel injector having a solenoid drive for an internal combustion engine of a motor vehicle is disclosed. The method includes determining a first target injection quantity to be injected per injection to inject the total fuel quantity throughout a series of consecutive injections; and performing a first subseries of consecutive injections, where the fuel injector is actuated according to the first target injection quantity. The method also includes determining a first fuel quantity injected during the first subseries of injections; determining a second target injection quantity to be injected per injection in a second subseries of consecutive injections, to inject the total fuel quantity throughout the first subseries and the second subseries of consecutive injections; and performing the second subseries of injections. The fuel injector is actuated according to the second target injection quantity.
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公开(公告)号：US11428183B2
公开(公告)日：2022-08-30
申请号：US17487444
申请日：2021-09-28
发明人： Motoaki Kato , Atsushi Ogawa , Kengo Nomura , Keisuke Kuroda
IPC分类号： F02D41/20
摘要： An electromagnetic valve driving device that drives an electromagnetic valve for injecting a fuel, includes: a first charging route that charges a bootstrap capacitor from a battery without intervention of a boost circuit; a second charging route that charges the bootstrap capacitor from the boost circuit; and a switching control unit that switches a charging route for charging the bootstrap capacitor to the first charging route or the second charging route.
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公开(公告)号：US11415069B2
公开(公告)日：2022-08-16
申请号：US17258118
申请日：2019-07-08
发明人： Jean Cannavo
IPC分类号： F02D41/20
摘要： Disclosed is a method for controlling a DC-DC voltage converter for driving with current at least one fuel injector of a motor-vehicle internal combustion engine. The method includes, when the transistor is switched from the off state to the on state, triggering a counter for measuring time, and, if at the end of a preset time called the “observation” time, the amplitude of the peak current has not reached its maximum value, steps of commanding that transistor so that the transistor switches from the on state to the off state, of keeping the transistor in the off state for a preset time called the “cooling time”, and of commanding the transistor so that the transistor switches to the on state at the end of the cooling time.
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公开(公告)号：US20220251981A1
公开(公告)日：2022-08-11
申请号：US17657349
申请日：2022-03-30
IPC分类号： F01M1/16 , F02D41/40 , F01M11/00 , F01M1/02 , F01M1/08 , F02D41/20 , F02D41/00 , F01M1/18 , F02B75/18 , F01M5/00
摘要： This disclosure generally relates to an oil mitigation system and method for lubricating the piston(s) for electronic fuel injected internal combustion engines, incorporating cylinder deactivation technology. This concept leverages the engine's base fuel injection pulse width table, determines the fuel injection “shutoff” state and, reduces the oiling to counter the reverse oil flow effect within the cylinder wall, past the ring set to the cylinder combustion chamber. This disclosure further comprises a system and method for mitigating oil consumption to all active cylinders, for accommodating all ranges of engine loading.
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公开(公告)号：US11408364B2
公开(公告)日：2022-08-09
申请号：US16956125
申请日：2018-12-11
IPC分类号： F02D41/20
摘要： Disclosed is a method for regulating the output voltage of a DC-to-DC voltage converter of a motor vehicle engine control computer. The method includes a step of the microcontroller simultaneously controlling a control module, so that the control module drives at least one injector of the vehicle engine, and a converter, so that the converter generates its own output voltage by setting the strength of the drive current to its maximum in what is called a “forced” mode corresponding to a step.
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10.发明授权公开(公告)号：US11384705B2
公开(公告)日：2022-07-12
申请号：US17430941
申请日：2020-03-27
发明人： Quentin Dussardier
摘要： The disclosure relates to a method for determining a drift in the static fuel flow rate of a piezoelectric injector of a motor vehicle combustion engine. The method relies on fluid-pressure measurements carried out in the injector supply chamber in order to calculate a measured static flow rate value. This value is compared against a nominal static flow rate in order to determine the existence, if any, and amplitude of the drift in the static flow rate. Furthermore, each pressure measurement is carried out when the valve of the injector is closed and the injector is open. In this way, the measured static flow rate calculation is not influenced by pressure-variation effects not relevant to the measurement.
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