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US 12,331,693 B2Granted
Engine, control device, and control
AssigneeYanmar Holdings Co., Ltd.
InventorsGin Morita, Daichi Matsunaga, Takafumi Tentora
Life of this patent
Estimating the term…
Abstract
An engine includes a cylinder, a piston, an ignition device, a rotation sensor, an intake temperature sensor, an intake pressure sensor, and a control device. The ignition device ignites a gas mixture. The rotation sensor measures the rotation speed of a crankshaft. The intake temperature sensor measures the temperature of the gas mixture. The intake pressure sensor measures a first pressure value of the gas mixture. The control device controls the hydrogen equivalent ratio of hydrogen contained in the gas mixture and/or timing of igniting the gas mixture based on the rotation speed, the temperature of the gas mixture, and the first pressure value of the gas mixture.
Claims12
An engine comprising:
- a cylinder configured to enable combustion of a gas mixture containing hydrogen;
- a piston configured to reciprocate in the cylinder;
- an ignition device configured to ignite the gas mixture;
- a rotation sensor configured to measure a rotation speed of a crankshaft;
- an intake temperature sensor configured to measure a temperature of the gas mixture;
- an intake pressure sensor configured to measure a first pressure value of the gas mixture;
- and
- a control device configured to:
- determine a compression temperature in the cylinder based on the temperature of the gas mixture;
- and
- control, based on a comparison between the compression temperature and a first reference value, a hydrogen equivalent ratio of the hydrogen contained in the gas mixture or a timing of igniting the gas mixture,
- wherein the control device includes:
- an abnormal combustion estimation unit configured to estimate an occurrence of abnormal combustion of the gas mixture, the occurrence of the abnormal combustion estimated based on the rotation speed, the temperature of the gas mixture, and the first pressure value of the gas mixture, wherein the abnormal combustion estimation unit includes:
- a temperature estimation unit configured to estimate the compression temperature in the cylinder based on the temperature of the gas mixture,
- a reference value determination unit configured to determine the first reference value based on the rotation speed, the temperature of the gas mixture, and the first pressure value of the gas mixture, and
- a determination unit configured to compare the first reference value and the compression temperature with each other to determine the occurrence of the abnormal combustion of the gas mixture;
- and
- a control unit configured to, based on the estimated occurrence of the abnormal combustion, output a first control signal for controlling the hydrogen equivalent ratio of the hydrogen contained in the gas mixture and/or the timing of igniting the gas mixture.
15 more elements
An engine comprising:
- a cylinder configured to enable combustion of a gas mixture containing hydrogen;
- a piston configured to reciprocate in the cylinder;
- an ignition device configured to ignite the gas mixture;
- a rotation sensor configured to measure a rotation speed of a crankshaft;
- an intake temperature sensor configured to measure a temperature of the gas mixture;
- an intake pressure sensor configured to measure a first pressure value of the gas mixture;
- a cylinder internal pressure sensor configured to measure a second pressure value of gas in the cylinder;
- and
- a control device configured to:
- determine a compression temperature in the cylinder based on the temperature of the gas mixture;
- and
- control, based on a comparison between the compression temperature and a first reference value, a hydrogen equivalent ratio of the hydrogen contained in the gas mixture or a timing of igniting the gas mixture
- wherein the control device includes:
- an abnormal combustion estimation unit configured to estimate an occurrence of abnormal combustion of the gas mixture, the occurrence of the abnormal combustion estimated based on the rotation speed, the second pressure value of the gas in the cylinder, and the temperature of the gas mixture, wherein the abnormal combustion estimation unit includes:
- a temperature estimation unit configured to estimate the compression temperature in the cylinder based on the temperature of the gas mixture,
- a reference value determination unit configured to determine the first reference value based on the rotation speed, the temperature of the gas mixture, and the second pressure value of the gas in the cylinder, and
- a determination unit configured to compare the first reference value and the compression temperature with each other to determine the occurrence of the abnormal combustion of the gas mixture;
- and
- a control unit configured to, based on the estimated occurrence of the abnormal combustion, output a first control signal for controlling the hydrogen equivalent ratio of the hydrogen contained in the gas mixture and/or the timing of igniting the gas mixture.
16 more elements
Dependencies are inferred from the claim text.