# US 11,028,788 B2 · Control device for internal-combustion engine

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- Number: US 11,028,788 B2
- Document ID: US11028788B2
- Status: Granted
- Kind: B2
- Application number: 16/810,093
- Filed: 2020-03-05
- Published: 2020-10-08
- Granted: 2021-06-08
- Earliest claimed: 2019-04-03
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Ryohei Sugamata; Takahiro Nishigaki
- Web page: https://patentgrep.com/patent/US11028788B2

## CPC

- F02D 41/0002: {Controlling intake air}
- F02D 19/084: {Blends of gasoline and alcohols, e.g. E85}
- F02D 29/02: peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
- F02D 41/0225: {in relation with the gear ratio or shift lever position}
- F02D 41/025: {by changing the composition of the exhaust gas, e.g. for exothermic reaction on exhaust gas treating apparatus}
- F02D 41/1497: {With detection of the mechanical response of the engine}
- F02M 25/06: adding lubricant vapours
- F02D 41/123: {the fuel injection being cut-off}
- F02D 41/126: {transitional corrections at the end of the cut-off period}
- F02D 41/18: by measuring intake air flow
- F02D 2041/001: {for engines with variable valve actuation}
- F02D 2041/0265: {to decrease temperature of the exhaust gas treating apparatus}
- F02D 2200/0404: Throttle position
- F02D 2200/0802: Temperature of the exhaust gas treatment apparatus
- F02D 2250/08: Engine blow-by from crankcase chamber
- F02D 2250/21: during a transition between engine operation modes or states
- Y02T 10/12: Improving ICE efficiencies
- Y02T 10/30: Use of alternative fuels, e.g. biofuels
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A control device for an engine, includes: an air intake controller controlling a quantity of intake air to be supplied to a catalyst provided in an exhaust passage by controlling an open degree of a throttle valve provided in an intake passage; a fuel controller controlling fuel supply to the engine, wherein the fuel controller stops the fuel supply and the air intake controller performs a first control supplying intake air to the catalyst by opening the throttle valve, for a predetermined period of time after an end of the first control, the fuel controller stops the fuel supply, and the air intake controller performs a second control decreasing the open degree of the throttle valve to an open degree smaller than that during the first control, and after the predetermined period of time passes, the fuel controller starts a third control supplying the fuel to the engine.

## Claims

### Claim 1

A control device for an internal-combustion engine, comprising:
an air intake controller configured to control a quantity of intake air to be supplied to a catalyst provided in an exhaust passage of the internal-combustion engine by controlling a degree of opening of a throttle valve provided in an intake passage of the internal-combustion engine;
a fuel controller configured to control supply of fuel to the internal-combustion engine, wherein
the fuel controller stops supply of the fuel and the air intake controller performs a first control that supplies intake air to the catalyst by opening the throttle valve,
when a start request of the internal combustion engine becomes ON, the air intake controller stops the first control,
for a predetermined period of time after an end of the first control, the fuel controller stops the supply of the fuel, and the air intake controller performs a second control that decreases the degree of opening of the throttle valve to a degree of opening smaller than a degree of opening during the first control, and
after the predetermined period of time passes, the fuel controller starts a third control that supplies the fuel to the internal-combustion engine.

### Claim 2 (depends on 1)

The control device according to claim 1, wherein
the internal-combustion engine includes a PCV passage connected to a crank case and the intake passage, the PCV passage introducing blow-by gas from the crank case to the intake passage.

### Claim 3 (depends on 1)

The control device according to claim 1, wherein
the fuel contains alcohol.

### Claim 4 (depends on 1)

The control device according to claim 1, further comprising:
a position acquisition unit configured to obtain a position of a shift lever of the internal-combustion engine, wherein
when the position of the shift lever becomes a neutral position, the air intake controller ends the first control and performs the second control.

### Claim 5 (depends on 1)

The control device according to claim 1, further comprising:
a rotation speed controller configured to control a rotation speed of the internal-combustion engine by an electric motor for the predetermined period of time.