# US 7,610,899 B2 · Control apparatus for internal combustion engine

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- Number: US 7,610,899 B2
- Document ID: US7610899B2
- Status: Granted
- Kind: B2
- Application number: 12/007,106
- Filed: 2008-01-07
- Published: 2008-05-22
- Granted: 2009-11-03
- Earliest claimed: 2005-03-18
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Inventors: Naoto Nakamura
- Web page: https://patentgrep.com/patent/US7610899B2

## CPC

- F02D 37/02: one of the functions being ignition
- F02D 41/3094: {the fuel injection being effected by at least two different injectors, e.g. one in the intake manifold and one in the cylinder}
- F02M 63/029: {per cylinder bank, e.g. storing different fuels or fuels at different pressure levels per cylinder bank}
- F02M 69/046: {for injecting into both the combustion chamber and the intake conduit}
- F02P 5/1502: {using one central computing unit}
- F02D 41/2422: {Selective use of one or more tables}
- Y02T 10/40: Engine management systems
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An engine ECU executes a program including the steps of: calculating a fuel injection ratio of an in-cylinder injector; calculating an amount of spark advance using a first map employed when the in-cylinder injector has a fuel injection ratio of one, said first map providing a timing of ignition with a maximum amount of spark advance; calculating an amount of spark advance using a second map employed for a fuel injection ratio of zero, said second map providing a timing of ignition with a minimum amount of spark advance; and calculating an amount of spark advance using a third map employed for a fuel injection ratio larger than zero and smaller than one, said third map providing a timing of ignition with a larger amount of spark advance for a larger ratio.

## Claims

### Claim 1

A control apparatus for an internal combustion engine having a first fuel injection mechanism injecting fuel into a cylinder and a second fuel injection mechanism injecting the fuel into an intake manifold, comprising:
a controller controlling said first and second fuel injection mechanisms to bear shares, respectively, of injecting the fuel at a ratio calculated as based on a condition required for said internal combustion engine;
a storage storing a reference timing of ignition; and
an ignition timing controller always employing at least said reference timing of ignition to control an ignition device,
wherein said first and second fuel injection mechanisms bear shares, respectively, of injecting the fuel;
wherein said storage stores said reference timing of ignition to provide spark advance when said first fuel injection mechanism is increased in said ratio;
wherein said storage stores in a form of a map said reference timing of ignition previously calculated as based on said ratio; and
wherein said storage stores said reference timing of ignition divided into a first map applied when said first fuel injection mechanism alone injects the fuel, a second map applied when said second fuel injection mechanism alone injects the fuel, and a third map applied when said first and second fuel injection mechanisms inject the fuel.

### Claim 2 (depends on 1)

The control apparatus according to claim 1, wherein said first map provides said reference timing of ignition set to provide spark advance.

### Claim 3 (depends on 1)

The control apparatus according to claim 1, wherein said second map provides said reference timing of ignition set to provide spark retard.

### Claim 4 (depends on 1)

The control apparatus according to claim 1, wherein said third map provides said reference timing of ignition set to provide spark retard when said second fuel injection mechanism is increased in said ratio.

### Claim 5

A control apparatus for an internal combustion engine having first fuel injection means for injecting fuel into a cylinder and second fuel injection means for injecting the fuel into an intake manifold, comprising:
control means for controlling said first and second fuel injection means to bear shares, respectively, of injecting the fuel at a ratio calculated as based on a condition required for said internal combustion engine, said ratio including preventing one of said fuel injection means from injecting the fuel;
storage means for storing a reference timing of ignition; and
ignition timing control means always employing at least said reference timing of ignition for controlling an ignition device,
wherein said first and second fuel injection means bear shares, respectively, of injecting the fuel;
wherein said storage means includes means for storing said reference timing of ignition calculated as to provide spark advance when said first fuel injection means is increased based on said ratio;
wherein said storage means includes means for storing in a form of a map said reference timing of ignition previously calculated as based on said ratio; and
wherein said storage means includes means for storing said reference timing of ignition divided into a first map applied when said first fuel injection means alone injects the fuel, a second map applied when said second fuel injection means alone injects the fuel, and a third map applied when said first and second fuel injection means inject the fuel.

### Claim 6 (depends on 5)

The control apparatus according to claim 5, wherein said first map provides said reference timing of ignition set to provide spark advance.

### Claim 7 (depends on 5)

The control apparatus according to claim 5, wherein said second map provides said reference timing of ignition set to provide spark retard.

### Claim 8 (depends on 5)

The control apparatus according to claim 5, wherein said third map provides said reference timing of ignition set to provide spark retard when said second fuel injection means is increased in said ratio.