VARIABLE IGNITION TYPE DIESEL-GASOLINE DUAL FUEL POWERED COMBUSTION ENGINE, SYSTEM, AND METHOD
First Claim
1. A variable ignition type diesel-gasoline dual fuel powered combustion engine comprising:
- a cylinder block including a plurality of cylinders, each cylinder connected to an air intake manifold for receiving air or a gasoline-mixed air and an exhaust manifold discharging an exhaust gas after combustions;
a spark plug provided for each cylinder;
a diesel fuel injector provided for each cylinder; and
an electronic control unit (ECU) controlling the engine in such a way that engine operating ranges are judged, and when the range is the high load range or the low load range, a gasoline-mixed air is sucked into the interior of the cylinder and is spark-ignited by the spark plug, and when the range is between the low load range and the high load range, a gasoline-mixed air is sucked into the interior of the cylinder and a diesel fuel is injected by way of the diesel injector, so the diesel-gasoline fuels are compressed and ignited.
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Accused Products
Abstract
A variable ignition type diesel-gasoline dual fuel powered combustion engine and control method can select spark ignition or compression ignition depending on the engine operating range. The variable ignition type diesel-gasoline dual fuel powered combustion engine includes a cylinder block formed of a plurality of cylinders each being connected to an air intake manifold sucking air or a gasoline fuel-mixed air and an exhaust manifold exhausting an exhaust gas after combustions; and an ECU controlling the combustion modes. The engine operating ranges are judged by the speed and load of the engine. When the range is the high load range or the low load range, a gasoline fuel combustion is performed, and when the range is between the high load range and the low load range, a diesel-gasoline dual fuel powered step is performed.
27 Citations
10 Claims
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1. A variable ignition type diesel-gasoline dual fuel powered combustion engine comprising:
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a cylinder block including a plurality of cylinders, each cylinder connected to an air intake manifold for receiving air or a gasoline-mixed air and an exhaust manifold discharging an exhaust gas after combustions; a spark plug provided for each cylinder; a diesel fuel injector provided for each cylinder; and an electronic control unit (ECU) controlling the engine in such a way that engine operating ranges are judged, and when the range is the high load range or the low load range, a gasoline-mixed air is sucked into the interior of the cylinder and is spark-ignited by the spark plug, and when the range is between the low load range and the high load range, a gasoline-mixed air is sucked into the interior of the cylinder and a diesel fuel is injected by way of the diesel injector, so the diesel-gasoline fuels are compressed and ignited. - View Dependent Claims (2)
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3. A method for controlling a variable ignition type diesel-gasoline dual fuel powered combustion engine in which a spark plug and a diesel fuel injector are provided in the interior of a cylinder, and air or a gasoline-mixed air is introduced by way of an air intake manifold and is spark-ignited or compression-ignited in the interior of the cylinder, comprising:
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a cold driving judgment step for judging whether or not an engine is warmed up by measuring the temperature of cooling water; an engine operating range judgment step for judging the engine operating range of an engine based on the speed and the load of the engine when it is judged that the engine is warmed up as a result of the judgment in the cold driving judgment step; and a combustion mode application step for driving in the previously set combustion mode of the engine depending on the engine operating range determined in the engine operating range judgment step. - View Dependent Claims (4, 5, 6, 7)
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8. A variable ignition type diesel-gasoline dual fuel powered combustion system which is formed of a plurality of cylinders, each cylinder being equipped with a spark plug and a diesel fuel injector, and air or a gasoline-mixed air is introduced into each cylinder, and an electronic control unit (ECU) is configured to control a gasoline fuel combustion, a diesel fuel combustion or a gasoline-diesel fuel combustion depending on an engine operating range, comprising:
an ECU controlling an engine to operate with one selected among a diesel-gasoline fuel combustion and a gasoline fuel combustion depending on the engine operating range by judging the engine operating ranges. - View Dependent Claims (9, 10)
Specification