# US 10,309,322 B2 · Control device for internal combustion engine

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- Number: US 10,309,322 B2
- Document ID: US10309322B2
- Status: Granted
- Kind: B2
- Application number: 15/895,780
- Filed: 2018-02-13
- Published: 2018-10-18
- Granted: 2019-06-04
- Earliest claimed: 2017-04-12
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Kenji Hoshi
- Web page: https://patentgrep.com/patent/US10309322B2

## CPC

- F02D 13/0211: {the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related}
- F02B 23/101: {the injector being placed on or close to the cylinder centre axis, e.g. with mixture formation using spray guided concepts}
- F02D 41/0245: {by increasing temperature of the exhaust gas leaving the engine}
- F02D 41/064: {at cold start (F02D41/067 takes precedence)}
- F02D 41/3041: {with means for triggering compression ignition, e.g. spark plug}
- 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}
- F02D 41/34: with means for controlling injection timing or duration
- F02D 41/402: {Multiple injections}
- F02D 43/00: Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
- F02M 61/14: Arrangements of injectors with respect to engines; Mounting of injectors
- F02M 61/182: {Discharge orifices being situated in different transversal planes with respect to valve member direction of movement}
- F02P 5/1502: {using one central computing unit}
- F02P 5/1504: {with particular means during a transient phase, e.g. acceleration, deceleration, gear change (during starting F02P5/1506)}
- F02P 5/1506: {with particular means during starting}
- F01N 3/204: {using an exhaust gas igniter, e.g. a spark or glow plug, without introducing fuel into exhaust duct}
- F01N 3/2896: {Liquid catalyst carrier}
- F01N 2900/1602: Temperature of exhaust gas apparatus
- F02B 23/105: {the fuel is sprayed directly onto or close to the spark plug}
- F02B 2023/102: {the spark plug being placed offset the cylinder centre axis}
- F02B 2023/103: {the injector having a multi-hole nozzle for generating multiple sprays}
- F02B 2023/106: {Tumble flow, i.e. the axis of rotation of the main charge flow motion is horizontal}
- F02D 29/02: peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
- F02D 45/00: Electrical control not provided for in groups F02D41/00 - F02D43/00
- F02D 2041/001: {for engines with variable valve actuation}
- F02D 2041/0015: {for engines with means for controlling swirl or tumble flow, e.g. by using swirl valves}
- F02P 5/045: {combined with electronic control of other engine functions, e.g. fuel injection (in general F02D37/02)}
- Y02T 10/12: Improving ICE efficiencies
- 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)
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- 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)
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

When it is determined that the initial combustion is unstable, the engine speed is forcibly increased. When the engine speed is forcibly increased, fluidity in the cylinder increases. When the fluidity in the cylinder rises, homogeneity of the homogeneous air-fuel mixture is improved. Therefore, it is possible to enlarge the flame kernel. When the flame kernel is enlarged, the initial flame resulting from the flame kernel is also enlarged. Then, the initial flame becomes easy to involve the closest fuel spray thereby the initial combustion can be stabilized.

## Claims

### Claim 1

A control device for controlling an internal combustion engine which is configured to control an engine,
wherein the engine comprising:
an injector which is provided in an upper portion of a combustion chamber where tumble flow is generated, the injector is configured to inject fuel into a cylinder from multiple injection ports;
a spark plug which is provided at the upper portion and is configured to ignite a fuel-air mixture inside the cylinder by using a discharge spark, the spark plug is provided on a downstream side relative to the injector in a tumble flow direction at the upper portion, the spark plug is located at the downstream side of closest fuel spray among the fuel sprays injected from the multiple injection ports and is located closer to the upper portion than a contour surface of the closest fuel spray; and
an exhaust gas cleaning catalyst that is configured to clean exhaust gas from the combustion chamber,
wherein the control device is configured to perform an engine control for activating the exhaust gas cleaning catalyst in which the spark plug and the injector are controlled, the spark plug is controlled so as to generate discharge spark at an ignition period on a retard side of compression top dead center, the injector is controlled so that a first injection is performed on an advance side of the compression top dead center and a second injection whose injection period is overlapped with at least a part of the ignition period is performed on the retard side of the compression top dead center,
wherein the control device is further configured to perform an engine control in which rotation speed of the engine is forcibly increased when it is determined that a parameter relative to stability of the initial combustion exceeds a threshold.

### Claim 2 (depends on 1)

The control device according to claim 1,
wherein the control device is further configured to perform an engine control in which the injector is controlled so that injection amount for the first injection is increased when it is determined, in cycles after increasing the rotation speed of the engine, that the parameter exceeds the threshold again.

### Claim 3 (depends on 1)

The control device according to claim 1,
wherein the control device is further configured to perform an engine control in which the injector is controlled so that the first injection is performed a plurality of times when it is determined, in cycles after increasing the rotation speed of the engine, that the parameter exceeds the threshold again.