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公开(公告)号：US11111866B2
公开(公告)日：2021-09-07
申请号：US16884171
申请日：2020-05-27
申请人： YANMAR CO., LTD.
发明人： Ryoichi Hagiwara , Kazuteru Toshinaga , Masayoshi Doi , Taishi Murakami , Tatsuro Ohsara , Osamu Yamagishi
摘要： An engine device including an intake manifold configured to supply air into a cylinder; an exhaust manifold configured to output exhaust gas from the cylinder; a gas injector which mixes a gaseous fuel with the air supplied from the intake manifold; and a main fuel injection valve configured to inject a liquid fuel into the cylinder for combustion. At the time of switching from a gas mode in which the gaseous fuel is supplied into the cylinder to a diesel mode in which the liquid fuel is supplied into the cylinder, a supply-start timing of the liquid fuel is delayed relative to a supply-stop timing of the gaseous fuel.
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公开(公告)号：US10690069B2
公开(公告)日：2020-06-23
申请号：US15760169
申请日：2016-05-24
申请人： Yanmar Co., Ltd.
发明人： Ryoichi Hagiwara , Kazuteru Toshinaga , Masayoshi Doi , Taishi Murakami , Tatsuro Ohsara , Osamu Yamagishi
摘要： An engine device of the present invention includes including: an intake manifold configured to supply air into a cylinder; an exhaust manifold configured to output exhaust gas from the cylinder; a gas injector which mixes a gaseous fuel with the air supplied from the intake manifold; and a main fuel injection valve configured to inject a liquid fuel into the cylinder for combustion. At the time of switching from a gas mode in which the gaseous fuel is supplied into the cylinder to a diesel mode in which the liquid fuel is supplied into the cylinder, a supply-start timing of the liquid fuel is delayed relative to a supply-stop timing of the gaseous fuel.
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公开(公告)号：US10330031B2
公开(公告)日：2019-06-25
申请号：US15113958
申请日：2015-01-15
发明人： Tatsuro Ohsara , Keiji Matsumoto , Osamu Yamagishi
IPC分类号： F02D19/02 , F02D41/14 , F02D41/00 , F02B43/00 , F02D29/06 , F02B29/04 , F02M21/02 , F02D23/00 , F02B61/04 , B63H21/14 , B63H21/17 , F02M21/04 , F02D41/34 , F02B37/16
摘要： A gas engine is provided that suppresses fluctuation of the actual air-fuel ratio even when a load fluctuates. A gas engine (1) in which at least one opening degree (D) selected from the opening degree of an air supply valve (5a) and the opening degree of a bypass valve (5b) is corrected so that an adequate target air-fuel ratio (λt) is achieved, wherein a target gas pressure (Pgt) and a target gas-jetting time (Tt) of a fuel gas are calculated on the basis of fluctuations of an actual load (L), the gas pressure is corrected on the basis of the target gas pressure (Pgt), and at least one opening degree selected from the opening degree of the air supply valve and the opening degree of the bypass valve is corrected on the basis of the amounts of change in the target gas pressure (Pgt) and the target gas-jetting time.
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公开(公告)号：US10393035B2
公开(公告)日：2019-08-27
申请号：US15760887
申请日：2016-05-24
申请人： Yanmar Co., Ltd.
IPC分类号： B63H21/00 , B63H21/21 , B63H21/32 , F02D19/06 , F02D19/10 , F02D31/00 , F02D41/00 , F02D41/30 , F02M37/00
摘要： An engine device including: an intake manifold configured to supply air into a cylinder; an exhaust manifold configured to output exhaust gas from the cylinder; a gas injector which mixes a gaseous fuel with the air supplied from the intake manifold; and a main fuel injection valve configured to inject a liquid fuel into the cylinder for combustion. At the time of switching the operation mode from one to the other between a gas mode and a diesel mode, an instant switching to the diesel mode is executed when the engine rotation number is determined to approach the upper limit value which leads to an emergency stop of the engine device.
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公开(公告)号：US10378461B2
公开(公告)日：2019-08-13
申请号：US15760890
申请日：2016-05-24
申请人： Yanmar Co., Ltd.
IPC分类号： B63H21/00 , F02D19/06 , F02D41/30 , F02D41/38 , F02D31/00 , F02D41/00 , F02D19/10 , F02B61/04 , F02D41/08
摘要： An engine device (21) including: an intake manifold (67) configured to supply air into a cylinder (77), an exhaust manifold (44) configured to output exhaust gas from the cylinder; a gas injector (98) which mixes a gaseous fuel with the air supplied from the intake manifold; and a main fuel injection valve (79) configured to inject a liquid fuel into the cylinder for combustion. At the time of switching the operation mode from one to another between a gas mode and a diesel mode, a supply amount of a first fuel to be supplied in a post-switching operation mode is increased to a switching threshold value through an increase control which monotonously increases the supply amount, and then is controlled by a speed-governing control based on the engine rotation number. The switching threshold value is set based on the engine rotation number or the engine load.
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公开(公告)号：US10337421B2
公开(公告)日：2019-07-02
申请号：US15370741
申请日：2016-12-06
申请人： YANMAR CO., LTD.
发明人： Koichi Hirose , Taishi Murakami , Tatsuro Ohsara
IPC分类号： F02D41/00 , F02B37/18 , F02D19/06 , F02D23/00 , F01N13/10 , F02B43/04 , F02M35/104 , F02D41/30 , F02B37/16 , F02D41/14 , F02B43/00 , F02D9/02
摘要： When a load on an engine device is lower than a first predetermined load falling within a low load range, feedback control is performed on a main throttle valve. When the load is higher than the first predetermined load, map control based on a data table is performed on the main throttle valve. When the load is higher than a second predetermined load higher than the first predetermined load, an opening degree of the main throttle valve is brought to a fully-open opening degree, and each of an exhaust bypass valve and an air supply bypass valve is controlled to allow pressure inside an intake manifold to be adjusted to a target value appropriate to the load.
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