Diesel engine
AssigneeNissan Motor Co., Ltd.
InventorsShuji Kimura, Osamu Aoki
Life of this patent
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Abstract
A dish-shaped combustion chamber (14) is formed in a diesel engine piston (13), and a fuel injector (16) is installed on the center axis of this combustion chamber (14). A device (3,41) is provided for varying the intake air amount aspirated into the engine. It is determined whether the engine is an idle running state or a normal running state. The device (3,41) is controlled so that the intake air amount in the idle running state is less than the intake air amount in the normal running state, and the injector (16) is controlled so that part of the fuel is injected before a main injection when the engine is in the idle running state.
Claims6
A diesel engine comprising:
- a piston having a dish-shaped combustion chamber is formed on its top surface,
- a fuel injector situated coaxially with the combustion chamber which injects fuel directly into a cylinder,
- an intake air amount control device which varies an intake air amount aspirated by the engine,
- a detector which detects a running state of the engine, and
- a microprocessor programmed to:
- determine whether or not the engine is an idle running state or a normal running state,
- control the intake air amount control device based on the engine running state so that the intake air amount in the idle running state is less than the intake air amount in the normal running state, and
- control the fuel injector so that part of the fuel is injected before a main injection when the engine is in the idle running state.
A diesel engine comprising:
- a piston having a dish-shaped combustion chamber is formed on its top surface,
- a fuel injector situated coaxially with the combustion chamber which injects fuel directly into a cylinder,
- an intake air amount control device which varies an intake air amount aspirated by the engine,
- a means for detecting a running state of the engine,
- means for determining whether or not the engine is an idle running state or a normal running state,
- means for controlling the intake air amount control device based on the engine running state so that the intake air amount in the idle running state is less than the intake air amount in the normal running state, and
- means for controlling the fuel injector so that part of the fuel is injected before a main injection when the engine is in the idle running state.
Dependencies are inferred from the claim text.