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US 5,826,565 AGranted
Internal combustion engine with externally supplied ignition and direct injection
AssigneeRobert Bosch GmbH
InventorsMartin Mueller, Uwe Maienberg
Life of this patent
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AssigneeRobert Bosch GmbH
InventorsMartin Mueller, Uwe Maienberg
Estimating the term…
An internal combustion engine with externally supplied ignition and direct injection comprising an intake tube, having at least two combustion chambers with at least one inlet valve and at least one outlet valve per combustion chamber and a fuel injection valve that injects directly into the combustion chamber. A supply line to the at least one inlet valve of each combustion chamber, in which air that is controlled by a throttle mechanism flows from the intake tube, wherein evaporated fuel from a fuel vapor retention system of a fuel tank of the engine is supplied to the air downstream of the throttle mechanism. The introduction of the evaporated fuel from the fuel vapor retention system into the supply line is only carried out in a partial number of the combustion chambers, in particular in a single combustion chamber of the engine. The internal combustion engine according to the invention, with externally supplied ignition and direct injection, is suitable for motor vehicles that have a fuel vapor retention system.
An internal combustion engine with externally supplied ignition and direct injection, comprising an intake tube, at least two combustion chambers with at least one inlet valve and at least one outlet valve per combustion chamber, a fuel injection valve that injects fuel directly into the combustion chamber, an air supply line to the at least one inlet valve of each combustion chamber, air in said supply line that flows from the intake tube is controlled by a throttle mechanism, wherein evaporated fuel from a fuel vapor retention system of a fuel tank of the engine is supplied to the air downstream of the throttle mechanism, the introduction of the evaporated fuel from the fuel vapor retention system into the supply line (16) is carried out in at least one combustion chamber (5) of the engine (1) in which the number of combustion chambers supplied with fuel is at least one less than a total number of combustion chambers of the engine.
An internal combustion engine with externally supplied ignition and direct injection according to claim 4, in which at least one supply opening (34) is provided in at least one of the branches (44, 45) of the supply line (16), downstream of the throttle mechanism (36), via which opening the evaporated fuel from the fuel vapor retention system is introduced into the branch (44;
An internal combustion engine with externally supplied ignition and direct injection, comprising an intake tube, at least two combustion chambers with at least two inlet valves for each combustion chamber and at least one outlet valve per combustion chamber, a fuel injection valve that injects fuel directly into the combustion chamber, an air supply line to the at least one inlet valve of each combustion chamber, air in said supply line that flows from the intake tube is controlled by a throttle mechanism, wherein evaporated fuel from a fuel vapor retention system of a fuel tank of the engine is supplied to the air downstream of the throttle mechanism, the introduction of the evaporated fuel from the fuel vapor retention system into the supply line (16) is carried out in at least one combustion chamber (5) of the engine (1) in which the number of combustion, chambers supplied with fuel is at least one less than a total number of combustion chambers of the engine, the at least two inlet valves are connected to the intake tube (14) via the supply line (16) and the supply line (16) includes branches (44, 45) that correspond to the number of inlet valves (7) per combustion chamber (5) and the throttle mechanism (36) is accommodated in an unbranched part (49) of the supply line (16).
Dependencies are inferred from the claim text.