US 5,115,790 A · Re-combustion control means for alcohol engine

Abstract

This re-combustion control means for an alcohol engine comprises intake and exhaust valves designed to be opened or closed by virtue of magnetic force that are disposed, respectively, in intake and exhaust ports of cylinders, control valves designed to be opened or closed by virtue of magnetic force that are disposed, respectively, in combustion gas ports communicating with each other via a combustion gas passageway, sensors for detecting a state in which the engine is operated, and a controller for controlling the supply of combustion gas from predetermined cylinders to the other cylinders via the combustion gas passageway in response to a detection signal detected by the sensors. In response to a signal informing that the engine is under partial load, the exhaust valves of the predetermined cylinders are maintained in a closed state with the control valves thereof being operated so as to be opened or closed, while the intake valves of the other cylinders are maintained in a closed state with the control valves thereof being operated so as to be opened or closed so that combustion gas produced in the predetermined cylinders is taken into the cylinders and is re-burned therein for complete combustion, the discharge of unburnt aldehyde or the like being thereby prevented.

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Drawings

Claims8

Dependent claims

Re-combustion control means for an alcohol engine having a cylinder block provided with cylinders, a cylinder head secured to said cylinder block, pistons each reciprocating in said cylinders of said cylinder block, intake ports and exhaust ports formed in said cylinder head, and intake valves and exhaust valves disposed in said intake ports and exhaust ports, respectively, and designed to sequentially operate in four-cycle of intake, compression, expansion and exhaust strokes.

said re-combustion control means comprising:
control valves disposed in said combustion gas ports,
a combustion gas passageway establishing communication between said combustion gas ports,
valve driving means for operating said intake, exhaust and control valves so as to be opened or closed by virtue of electromagnetic force, and
said engine has four cylinders, wherein any two selected cylinders of said four cylinders take thereinto suction air via said intake ports and discharge combustion gas into said combustion gas passageway via said combustion gas ports, wherein the other two cylinders take thereinto combustion gas in said combustion gas passageway via said combustion gas ports, and wherein re-combustion gas is discharged outside via said exhaust ports;
whereby said re-combustion control means is controlled such that alcohol fuel is burned with air introduced via said intake ports of the selected cylinders of said cylinders, that combustion gas from said selected cylinders is discharged into said combustion gas passageway by opening said control valves during an exhaust stroke, that combustion gas is then supplied into the other cylinders from said combustion gas passageway by opening said control valves of the other cylinders that are performing an intake stroke, so that said combustion gas so supplied is re-burned in said other cylinders, and that combustion gas resulting from the re-combustion is then discharged outside by opening said exhaust valves of said other cylinders during an exhaust stroke.

3 more elements

Re-combustion control means for an alcohol engine having a cylinder block provided with cylinders, a cylinder head secured to said cylinder block, pistons each reciprocating in said cylinders of said cylinder block, intake ports and exhaust ports formed in said cylinder head, intake valves and exhaust valves disposed in said intake ports and exhaust ports, respectively, and means for supplying alcohol fuel into said cylinders, and designed to sequentially operate in four-cycle of intake, compression, expansion and exhaust strokes, said re-combustion control means comprising;

combustion gas ports formed in said cylinder head,
control valves disposed in said combustion gas ports,
a combustion gas passageway establishing communication between said combustion gas ports,
valve driving means for operating said intake, exhaust and control valves so as to be opened or closed by virtue of electromagnetic force,
a load sensor for detecting the loaded state of the engine, and
a controller for performing controls such that in response to a detection signal from said load sensor informing that the engine is under partial load said exhaust valves of said predetermined cylinders out of said cylinders are maintained in a closed state with said control valves being operated so as to be opened or closed so that combustion gas is discharged into said combustion gas passageway via said combustion gas ports, while said intake valves of said other cylinders are maintained in a closed state with said control valves of being operated so as to be opened or closed so that combustion gas in said combustion gas passageway is supplied into said other cylinders via said combustion gas ports, that combustion gas produced after re-burned is discharged outside via said exhaust ports of said other cylinders, and that in response to a detection signal from said load sensor informing that the engine is under high load said control valves are maintained in a closed state with said exhaust and intake valves being normally operated so that suction air is introduced into each of said cylinders via said intake ports with combustion gas being discharged outside via said exhaust ports.

3 more elements

Re-combustion control means for an alcohol engine having a cylinder block provided with cylinders, a cylinder head secured to said cylinder block, pistons each reciprocating in said cylinders of said cylinder block, intake ports and exhaust ports formed in said cylinder head, intake valves and exhaust valves disposed in said intake ports and exhaust ports, respectively, and means for supplying alcohol fuel into said cylinders, and designed to sequentially operate in four-cycle of intake, compression, expansion and exhaust strokes, said re-combustion control means comprising;

combustion gas ports formed in said cylinder head,
control valves disposed in said combustion gas ports,
a combustion gas passageway establishing communication between said combustion gas ports,
valve driving means for operating said intake, exhaust and control valves so as to be opened or closed by virtue of electromagnetic force,
a load sensor for detecting the loaded state of the engine, and
a controller for performing controls such that in response to a detection signal from said load sensor informing that the engine is under partial load said exhaust valves of said predetermined cylinders out of said cylinders are maintained in a closed state with said control valves being operated so as to be opened or closed so that combustion gas is discharged into said combustion gas passageway via said combustion gas ports, while said intake valves of said other cylinders are maintained in a closed state with said control valves being operated so as to be opened or closed so that combustion gas in said combustion gas passageway is supplied into said other cylinders via said combustion gas ports, and that combustion gas produced after re-burned is discharged outside via said exhaust ports of said other cylinders.

3 more elements

Dependencies are inferred from the claim text.

Description4,775 words

Summary1,783 words

#1. Field of the Invention

#The present invention relates to a re-combustion means for an alcohol engine having valves adapted to be opened and/or closed by virtue of electromagnetic force.

#2. Description of the Prior Art

Brief description of the drawings3 figures

#FIG. 1 is a cross-sectional view of an embodiment of a re-combustion control means for an alcohol engine according to the present invention,

#FIG. 2 is an explanatory view explaining the control of the opening and/or closing operation of intake and exhaust valves and control valves of the re-combustion control means for an alcohol engine shown in FIG. 1, and

#FIG. 3 is a process flow chart showing an example of the operation of the re-combustion control means for an alcohol engine shown in FIG. 1.

Detailed description2,906 words

#Referring to the accompanying drawings, one embodiment of a re-combustion control means for an alcohol engine according to the present invention will be described below.

#FIG. 1 is a schematic explanatory view showing one embodiment of the re-combustion control means for an alcohol engine according to the present invention, and FIG. 2 is a schematic plan view explaining the re-combustion control means for an alcohol engine shown in FIG. 1. In this embodiment, a four-cylinder alcohol engine is taken as an example for the sake of clear understanding of an explanation of the re-combustion control means for an alcohol engine to be made as below.

#This alcohol engine comprises cylinders 19, constituted by four cylinders 1, 2, 3, 4, that are formed in a cylinder block, a cylinder head 12 secured to the cylinder block, and pistons 5 each designed to reciprocate in the respective cylinders 19. Intake ports 16 and exhaust ports 17 for the respective cylinders 1, 2, 3, 4 are formed in the cylinder head 12, and on top of these intake and exhaust ports 16, 17, combustion gas ports 18 as a third port for the respective cylinders 1, 2, 3, 4 are also formed in the cylinder head 12. Intake valves 6 are disposed, respectively, in the intake ports 16 formed in the cylinder lead 12, and exhaust valves 7 are disposed, respectively, in the exhaust ports 17 formed in the cylinder head 12. Control valves 8 are also disposed, respectively, in the combustion gas ports 18. These combustion gas ports 18 are constructed such that they communicate with each other via a combustion gas passageway 11.

Facts

Application

07/593,447Filed 4 Oct 1990

Priority

JP 1-28191931 Oct 1989

Granted

26 May 1992

Term ended

4 Oct 2010

Estimated · how

Pre-1995 term; greater of 17 years from grant or 20 years from filing when eligible. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification12 codes

F02D 13/0276
During engine operation: actuation of an additional valve for a special application, e.g. for decompression, exhaust gas recirculation or cylinder…
F02B 1/02
Engines characterised by fuel-air mixture compression: with positive ignition
F02B 13/10
Engines characterised by the introduction of liquid fuel into cylinders by use of auxiliary fluid: use of specific auxiliary fluids, e.g. steam,…
F02D 21/08
Peculiar to engines having other non-fuel gas added to combustion air: the other gas being the exhaust gas of engine

Re-combustion control means for alcohol engine

Life of this patent

Re-combustion control means for alcohol engine

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims8

Description4,775 words

Drawings

Classification12 codes

Life of this patent

Description4,775 words