US 6,644,272 B2 · Diesel engine

Abstract

A diesel engine (1) has: a flow adjuster (10) for throttling exhaust flow; an intake heater (71) for heating intake air; a thermal medium circulator (72) for circulating a thermal medium to warm the diesel engine (1); a cylinder cut-off device (73) for conducting cylinder cut-off; and a fuel injection timing advancing device (74) for advancing timing for supplying fuel to a cylinder, the respective devices being actuated at least from pre-high-idle step to a neighborhood of high-idle condition, so that fuel combustion stabilization of the diesel engine (1) can be rapidly enhanced during a period where less fuel is supplied into the cylinder and fuel combustion time is short, thus greatly reducing discharge of white smoke and possibility of engine bunching.

Claims32

Dependent claims

A diesel engine (1), comprising:

a combustion stabilization assist (10, 71, 72, 73, 74) for enhancing stabilization of combustion of fuel supplied into a combustion chamber,
the combustion stabilization assist (10, 71, 72, 73, 74) being actuated for a predetermined period in accordance with operating condition of the diesel engine (1).
wherein the predetermined period is either one of a first predetermined period from starting the diesel engine (1) until the diesel engine (1) reaches a neighborhood of high-idle condition and a second predetermined period from a pre-high-idle step before the condition of the diesel engine (1) reaches the high-idle condition until the condition of the diesel engine (1) reaches the neighborhood of the high-idle condition.

A diesel engine (1), comprising:

a combustion stabilization assist (10, 71, 72, 73, 74) for enhancing stabilization of combustion of fuel supplied into a combustion chamber,
the combustion stabilization assist (10, 71, 72, 73, 74) being actuated for a predetermined period in accordance with operating condition of the diesel engine (1),
wherein the predetermined period is either one of a third predetermined period from starting the diesel engine (1) until a predetermined time has elapsed after the diesel engine (1) reaches a high-idle condition and a fourth predetermined period from a pre-high-idle step before the condition of the diesel engine (1) reaches the high-idle condition until a predetermined time has elapsed after the diesel engine (1) reaches the high-idle condition, and/or
either one of a fifth predetermined period from starting the diesel engine (1) until a predetermined load is applied to the engine after the diesel engine (1) reaches the high-idle condition and a sixth predetermined period from a pre-high-idle step before the condition of the diesel engine (1) reaches the high-idle condition until a predetermined load is applied to the engine after the diesel engine (1) reaches the high-idle condition.

1 more element

Dependencies are inferred from the claim text.

Diesel engine

Life of this patent

Diesel engine

Life of this patent

Abstract

Claims32