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公开(公告)号：EP4306791A1
公开(公告)日：2024-01-17
申请号：EP22766805.0
申请日：2022-02-21
申请人： Kubota Corporation
摘要： Provided is an injector control device which is capable of setting a preceding injection amount to a fuel injection amount that is less than a main injection amount, while suppressing situations where preceding injections executed prior to a main injection in multi-stage injection are eliminated.
An injector control device 2 includes: an injection amount setting unit 211 that sets, as a total injection amount, a total of fuel injection amounts in multi-stage injection in a single cycle, and sets, as a preceding injection amount, a fuel injection amount in a preceding injection executed prior to a main injection in the multi-stage injection; an energization period setting unit 212 that sets an energization period of an injector 31 based on the fuel injection amounts set by the injection amount setting unit 211; and an injector driving unit 213 that controls driving of the injector 31 based on the energization period set by the energization period setting unit 212. The injection amount setting unit 211 sets a fuel injection amount that is a predetermined percentage of the total injection amount as the preceding injection amount.-
2.发明公开
公开(公告)号：EP4394174A1
公开(公告)日：2024-07-03
申请号：EP22860816.2
申请日：2022-02-21
申请人： Kubota Corporation
摘要： [Problem] There are provided a diesel engine, a diesel engine manufacturing method, and a diesel engine injection-amount correction system which can easily improve accuracy of correction of variations in fuel injection amount. [Solution] A diesel engine 30 includes an injector 4 that uses a solenoid to directly drive a needle valve and inject a fuel and an injector control device 2 that controls the driving by the injector 4. The injector control device 2 includes a charge voltage control circuit 22, a storage unit 25 that stores a correction value related to an injection amount of the fuel injected from the injector 4, and an injector control circuit 24 that controls the driving by the injector 4 on the basis of each of a voltage supplied from the charge voltage control circuit 22 and the correction value stored in the storage unit 25. The correction value is set according to a voltage applied to a terminal of the injector control device 2 connected to a load when a current starts to flow in the load connected to the injector control device 2.
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公开(公告)号：EP4269781A1
公开(公告)日：2023-11-01
申请号：EP21914980.4
申请日：2021-10-25
申请人： Kubota Corporation
发明人： OSO, Hiroki , TAGASHIRA, Yuki , TAMURA, Akira , KANEKO, Rina , SUEHIRO, Kiichi
摘要： Provided is an electronic fuel injection type diesel engine capable of performing precise electronic fuel injection control. A fuel injector 7 includes a main body portion 7c having a large diameter, a nozzle portion 7d having a small diameter, and a pressing surface 7e formed at a step portion between the main body portion 7c and the nozzle portion 7d, in which the nozzle portion 7d of the fuel injector 7 is inserted from an inside of a sleeve 10 into an inside of an insertion hole 1a, the fuel injector 7 is pressed toward a vortex chamber 2 by a pressing force 11, and the pressing force 11 applied to the fuel injector 7 is received by a pressure receiving surface 10b of the sleeve 10 from the pressing surface 7e of the fuel injector 7 via the washer 12.
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