Abstract: A homogeneous charge compression ignition internal combustion engine (HCCI) (1) is able to supply two types of fuels with different octane numbers to each cylinder (3) through fuel supply devices (17, 18). A controller (2) detects via an ion current sensor (21) disposed in each cylinder (3) a combustion timing corresponded state value having a regular correlativity to a combustion timing for each cylinder (3) and then adjusts by using the fuel supply devices (17, 18) a relative proportion of a respective supplied quantity of each fuel to each cylinder (3) according to a deviation between the combustion timing corresponded state value and a desired state value set according to a working state of the HCCI engine 1. Thereby, it is able to efficiently inhibit variations on the combustion timing for each cylinder of the HCCI engine 1 having plural cylinders without involving a complex mechanism.

Abstract: A controller includes a first intermediate mode which, when the operation mode of an internal combustion engine is shifted from a compression ignition operation mode to a spark ignition operation mode, is interposed between both the operation modes, and a second intermediate mode which, when the operation mode of the internal combustion engine is shifted from the spark ignition operation mode to the compression ignition operation mode, is interposed between both the operation modes. An air supply amount and a fuel supply amount to a combustion chamber is controlled so that the air-fuel ratio of an air-fuel mixture becomes rich gradually in the first intermediate mode, and the air supply amount and the fuel supply amount to the combustion chamber is controlled so that the air-fuel ratio of the air-fuel mixture becomes lean gradually in the second intermediate mode.

Abstract: A system for separating an ethanol-gasoline blended fuel into gasoline and ethanol-water mixture by mixing water therewith with a lightweight, compact and simple configuration is provided. The system includes a fuel tank for storing a blended fuel; pump means for sucking the blended fuel in the fuel tank, separating the blended fuel into gasoline and ethanol-water mixture by mixing water therewith, and pressure-feeding the separated gasoline and ethanol-water mixture; a separation tank provided inside the fuel tank, and storing the gasoline and the ethanol-water mixture pressure-fed by the pump means in a state separated from each other and in a pressurized state; gasoline drawing means for drawing the gasoline stored in the separation tank via a first on-off valve; and ethanol drawing means for drawing the ethanol-water mixture stored in the separation tank via a second on-off valve.

Abstract: To provide a diesel light oil composition having an excellent ignitability while containing butanol. The diesel light oil composition comprises a diesel light oil base material, butanol having a volume percentage in a range of 9% to 20% and butyl nitrate or butyl nitrite having a volume percentage in a range of 0.8% to 4%. It is preferable that the butanol is 20 v/v %, and the butyl nitrate or butyl nitrite is 4 v/v %. The butyl nitrite or butyl nitrate is derived from butanol as a material.

Abstract: A HCCI engine (1) is able to supply two types of fuels with different octane numbers to each cylinder (3) through fuel supply devices (17 and 18). A fuel supply control means (50) of a controller (2) increases a proportion of a supplied quantity of a low-octane fuel in the entire supplied quantity of the respective two types of fuels to a combustion chamber greater than a normal proportion defined by a normal control operation value group determined by a predefined control rule according to a FC correction processor (57) in a predefined duration immediately after a return of a working mode from a fuel-cut mode to a normal mode. Thereby, it is able to efficiently perform combustion of the fuel-air mixture in the combustion chamber even after the return of the working mode from the fuel-cut mode to the normal mode when a temperature in the combustion chamber is low.

Abstract: A homogeneous charge compression ignition internal combustion engine (HCCI) (1) is able to supply two types of fuels with different octane numbers to each cylinder (3) through fuel supply devices (17, 18). A controller (2) detects via an ion current sensor (21) disposed in each cylinder (3) a combustion timing corresponded state value having a regular correlativity to a combustion timing for each cylinder (3) and then adjusts by using the fuel supply devices (17, 18) a relative proportion of a respective supplied quantity of each fuel to each cylinder (3) according to a deviation between the combustion timing corresponded state value and a desired state value set according to a working state of the HCCI engine 1. Thereby, it is able to efficiently inhibit variations on the combustion timing for each cylinder of the HCCI engine 1 having plural cylinders without involving a complex mechanism.

Abstract: A controller includes a first intermediate mode which, when the operation mode of an internal combustion engine is shifted from a compression ignition operation mode to a spark ignition operation mode, is interposed between both the operation modes, and a second intermediate mode which, when the operation mode of the internal combustion engine is shifted from the spark ignition operation mode to the compression ignition operation mode, is interposed between both the operation modes. An air supply amount and a fuel supply amount to a combustion chamber is controlled so that the air-fuel ratio of an air-fuel mixture becomes rich gradually in the first intermediate mode, and the air supply amount and the fuel supply amount to the combustion chamber is controlled so that the air-fuel ratio of the air-fuel mixture becomes lean gradually in the second intermediate mode.

Abstract: A Rankine cycle system includes an evaporator for heating water with thermal energy of exhaust gas of an engine so as to generate steam, an expander for converting the thermal energy of the steam generated by the evaporator into mechanical energy and a temperature controller for making the temperature of the steam supplied from the evaporator to the expander coincide with a target temperature. The temperature controller includes a water supply amount controller for manipulating the amount of water supplied to the evaporator and a water injection quantity controller for supplying water to the exhaust gas upstream of the evaporator during an expansion stroke or an exhaust stroke of the engine, when the thermal energy of exhaust gas changes suddenly accompanying a change in the load of the engine and the temperature of the steam cannot be controlled at the target temperature by supply of water to the evaporator.

Abstract: A vehicular Rankine cycle system includes: an evaporator for heating a liquid-phase working medium with thermal energy of exhaust gas of an engine so as to generate a gas-phase working medium; a displacement type expander for converting thermal energy of the gas-phase working medium generated by the evaporator into mechanical energy; gas-phase working medium controller for controlling the temperature and/or pressure of the gas-phase working medium supplied to the expander at a target temperature and/or a target pressure by changing the amount of liquid-phase working medium supplied to the evaporator; and throttle opening degree controller for controlling a throttle opening degree of the engine by correcting an accelerator opening degree directed by a driver.