Controller for homogenous charge compression ignition internal combustion engine
First Claim
1. A controller for a homogeneous charge compression ignition internal combustion engine which includes a plurality of cylinders, and a fuel supply device capable of supplying respectively plural types of fuels with mutually different octane numbers to a combustion chamber in each of the plurality of cylinders and adjusting a supplied quantity of the respective plural types of fuels supplied to each of the plurality of cylinders, wherein a fuel-air mixture having a fuel supplied to the combustion chamber in each of the plurality of cylinders by the fuel supply device and air inhaled to the combustion chamber is ignited to make a combustion by compressing the fuel-air mixture, comprising:
- a combustion timing corresponded state value detection means for detecting a combustion timing corresponded state value which is a state value of a predefined type having a regular correlativity to a combustion timing of the fuel-air mixture for each cylinder;
a desired state value setting means for setting a desired state value of the combustion timing corresponded state value for each cylinder according to a working state of the homogeneous charge compression ignition internal combustion engine; and
a fuel supply control means for adjusting by using the fuel supply device a relative proportion of a supplied quantity of the respective plural types of fuels to each cylinder according to a deviation between the detected combustion timing corresponded state value and the desired state value set by the desired state value setting means so as to approximate the deviation to zero.
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Accused Products
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.
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Citations
8 Claims
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1. A controller for a homogeneous charge compression ignition internal combustion engine which includes a plurality of cylinders, and a fuel supply device capable of supplying respectively plural types of fuels with mutually different octane numbers to a combustion chamber in each of the plurality of cylinders and adjusting a supplied quantity of the respective plural types of fuels supplied to each of the plurality of cylinders, wherein a fuel-air mixture having a fuel supplied to the combustion chamber in each of the plurality of cylinders by the fuel supply device and air inhaled to the combustion chamber is ignited to make a combustion by compressing the fuel-air mixture, comprising:
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a combustion timing corresponded state value detection means for detecting a combustion timing corresponded state value which is a state value of a predefined type having a regular correlativity to a combustion timing of the fuel-air mixture for each cylinder; a desired state value setting means for setting a desired state value of the combustion timing corresponded state value for each cylinder according to a working state of the homogeneous charge compression ignition internal combustion engine; and a fuel supply control means for adjusting by using the fuel supply device a relative proportion of a supplied quantity of the respective plural types of fuels to each cylinder according to a deviation between the detected combustion timing corresponded state value and the desired state value set by the desired state value setting means so as to approximate the deviation to zero. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification