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公开(公告)号：US11319871B2
公开(公告)日：2022-05-03
申请号：US17391690
申请日：2021-08-02
摘要： In certain embodiments, Lube Oil Controlled Ignition (LOCI) Engine Combustion overcomes the drawbacks of known combustion technologies. First, lubricating oil is already part of any combustion engine; hence, there is no need to carry a secondary fuel and to have to depend on an additional fuel system as in the case of dual-fuel technologies. Second, the ignition and the start of combustion rely on the controlled autoignition of the lubricating oil preventing the occurrence of abnormal combustion as experienced with the Spark Ignition technology. Third, LOCI combustion is characterized by the traveling of a premixed flame; hence, it has a controllable duration resulting in a wide engine load-speed window unlike the Homogeneous Charge Compression Ignition technology where the engine load-speed window is narrow. Adaptive Intake Valve Closure may be used to control in-cylinder compression temperature to be high enough to realize the consistent auto ignition of the lubricating oil mist.
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公开(公告)号：US11230982B2
公开(公告)日：2022-01-25
申请号：US16079174
申请日：2017-03-09
发明人： Staffan Lundgren
摘要： A method is provided for operating an internal combustion piston engine, including introducing air into a cylinder of the engine, compressing the air in a first compression stroke of the cylinder, providing fuel into the cylinder for a first combustion, with a portion of the oxygen in the compressed air as oxidant, in a first power stroke succeeding the first compression stroke, to produce residues including oxygen, compressing the residues in a second compression stroke succeeding the first power stroke, and providing, after the first combustion, fuel into the cylinder for a second combustion, with at least a portion of the oxygen of the residues as oxidant, in a second power stroke succeeding the second compression stroke, wherein the first compression stroke is repealed immediately after the second power stroke, and the introduction of air into the cylinder is done at the end of the second power stroke and/or at the beginning of the first compression stroke.
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公开(公告)号：US11193075B1
公开(公告)日：2021-12-07
申请号：US16930453
申请日：2020-07-16
发明人： Eric Monroe , Joseph Carlson , Ryan Wesley Davis
摘要： A fuel for an internal combustion engine includes a fatty alkyl ether having a formula corresponding to formula (II): wherein x is 1-8, and y is 0 to 3; and the alkyl is an alkyl group having a number of carbon atoms that is less than the number of carbon atoms in the alkyl chain on the opposite side of the oxygen atom. The fatty alky ether can be used as a neat fuel or blend with biodiesel, diesel, ethanol or other fuels. The fatty alkyl ethers are improved in cetane number and cold flow properties over a biodiesel with fatty acid methyl acid methyl ester compounds. This is particularly valuable for compression ignition engines. A method of combustion in several types of engines is also disclosed.
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公开(公告)号：US11149628B2
公开(公告)日：2021-10-19
申请号：US16454298
申请日：2019-06-27
申请人： Amaroq Limited
IPC分类号： F02B25/06 , F02B1/12 , F02B25/14 , F02B33/04 , F02P19/00 , F02P15/00 , F02B75/02 , F02F7/00 , F23Q7/00
摘要： Disclosed is a piston ported two-stroke compression ignition internal combustion engine comprising: a cylinder having a fixed closed end, and a piston for reciprocation within the cylinder, wherein the closed end of the cylinder and the piston together define a combustion chamber therebetween; at least one heater to heat the combustion chamber; and a controller to control the heater to heat the combustion chamber when the controller determines that a temperature of the combustion chamber has fallen below a threshold temperature during reciprocation of the piston within the cylinder.
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公开(公告)号：US11111865B2
公开(公告)日：2021-09-07
申请号：US16675508
申请日：2019-11-06
发明人： Shinichi Hikitani , Hajime Umehara , Naoki Nagano , Tomokuni Kusunoki , Tatsuya Takahata , Shinji Watanabe , Masanobu Koutoku , Toshinori Ueno , Katsuya Murakami , Nobuhiko Yokoyama
摘要： A compression ignition engine with a supercharger is provided, which includes one or more valves configured to switch a state between a first state where intake air is boosted by the supercharger and a second state where it is not boosted, a fluid temperature adjuster configured to adjust a temperature of engine coolant to be supplied to a radiator from an engine body, and a controller. When the engine operates in a high-load range, the controller controls the combustion mode to be in a compression ignition combustion mode, and causes the valve(s) to be in the first state, and in a low-load range, the controller causes the valve(s) to be in the second state. In the high-load range, the controller outputs a control signal to the fluid temperature adjuster so that a target temperature of the engine coolant is lowered than that in the low-load range.
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公开(公告)号：US11111846B2
公开(公告)日：2021-09-07
申请号：US16039266
申请日：2018-07-18
摘要： In certain embodiments, Lube Oil Controlled Ignition (LOCI) Engine Combustion overcomes the drawbacks of known combustion technologies. First, lubricating oil is already part of any combustion engine; hence, there is no need to carry a secondary fuel and to have to depend on an additional fuel system as in the case of dual-fuel technologies. Second, the ignition and the start of combustion rely on the controlled autoignition of the lubricating oil preventing the occurrence of abnormal combustion as experienced with the Spark Ignition technology. Third, LOCI combustion is characterized by the traveling of a premixed flame; hence, it has a controllable duration resulting in a wide engine load-speed window unlike the Homogeneous Charge Compression Ignition technology where the engine load-speed window is narrow. Adaptive Intake Valve Closure may be used to control in-cylinder compression temperature to be high enough to realize the consistent auto ignition of the lubricating oil mist.
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公开(公告)号：US11066977B1
公开(公告)日：2021-07-20
申请号：US16749642
申请日：2020-01-22
申请人： Caterpillar Inc.
发明人： David Y. Chang
IPC分类号： F02B19/00 , F02B1/12 , F02M26/01 , F02D37/02 , F02B3/06 , F02D41/38 , F02B75/12 , F02D41/00 , F02D13/02
摘要： In one aspect, an engine ignition apparatus for a natural gas engine may include a housing including a drive piston, a floating piston, a controllable hydraulic fluid chamber located between the drive piston and the floating piston, and an ignition chamber acted on by the floating piston, the ignition chamber having an outlet formed by a plurality of orifices, the outlet being in direct communication with a combustion chamber of the engine. In another aspect, an engine ignition apparatus for a natural gas engine may include, among other features, a controllable valve connected to a hydraulic fluid chamber, and configured to open and release a hydraulic fluid from the hydraulic fluid chamber, and to close. In still another aspect, a method for controlling an engine ignition apparatus for an engine includes, among other features, controlling a volume of a hydraulic fluid chamber of an ignition apparatus.
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公开(公告)号：US20200208582A1
公开(公告)日：2020-07-02
申请号：US16675508
申请日：2019-11-06
发明人： Shinichi Hikitani , Hajime Umehara , Naoki Nagano , Tomokuni Kusunoki , Tatsuya Takahata , Shinji Watanabe , Masanobu Koutoku , Toshinori Ueno , Katsuya Murakami , Nobuhiko Yokoyama
摘要： A compression ignition engine with a supercharger is provided, which includes one or more valves configured to switch a state between a first state where intake air is boosted by the supercharger and a second state where it is not boosted, a fluid temperature adjuster configured to adjust a temperature of engine coolant to be supplied to a radiator from an engine body, and a controller. When the engine operates in a high-load range, the controller controls the combustion mode to be in a compression ignition combustion mode, and causes the valve(s) to be in the first state, and in a low-load range, the controller causes the valve(s) to be in the second state. In the high-load range, the controller outputs a control signal to the fluid temperature adjuster so that a target temperature of the engine coolant is lowered than that in the low-load range.
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公开(公告)号：US10590845B1
公开(公告)日：2020-03-17
申请号：US15952830
申请日：2018-04-13
申请人： Roderick A. Newstrom
发明人： Roderick A. Newstrom
摘要： A two cycle-opposed piston, two cycle, homogenous charge compression ignition engine with cylinder sets, each cylinder set having a first cylinder with an intake port; a second cylinder coaxially aligned with the first cylinder and having an exhaust port; a first piston engaged within the first cylinder; a second piston engaged within the second cylinder; a combustion chamber formed between the first piston and the second piston; a first cam mechanically engaged with the first piston; a mechanical device to convert reciprocating motion to rotational motion connected to the second piston; and a charge pump connected to the intake port by an intake passage.
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公开(公告)号：US10563569B2
公开(公告)日：2020-02-18
申请号：US15865296
申请日：2018-01-09
发明人： Wuqiang Long , Hua Tian , Jiangping Tian , Yao Fu , Jingchen Cui , Kai Sheng , Ping Yi , Kunpeng Qi , Qiang Zhang , Yicong Wang
摘要： A diesel combustion system including a piston, an annular impinging block, and a combustion chamber. The combustion chamber is divided by the annular impinging block into an upper chamber and a lower chamber. The annular impinging block includes a lower guide surface that is adjacent to the lower chamber and that extends from a trough line connected to the piston to a crest line. The ratios among the inner diameter of the top of the piston, the outer diameter of the top of the piston, the diameter of the trough line, and the diameter of the crest line define the shape of the combustion chamber which leads to increased rate of combustion, reduced soot emission, and increased fuel efficiency.
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