Apparatus for disconnecting individual cylinders on an internal combustion engine
First Claim
1. An apparatus for disconnecting individual cylinders of an internal combustion engine (11), having a fuel injection pump (10) that has at least two partial suction chambers (14, 15) that can be deactivated from one another and are associated with different cylinders (13a, 13b) of the engine (11), a feed pump (30) which for operation of the cylinders (13a) pumps fuel from a fuel supply tank (20) into the applicable partial suction chamber (15), wherein to deactivate the cylinders (13a) the delivery of fuel from the feed pump (30) to the applicable partial suction chamber (15) is interrupted by means of a reversing valve (31;
- 53) introduced between the feed pump (30) and the partial suction chamber (15), the reversing valve (31;
53), is in a pumping position for operation of the deactivatable cylinders (13a), the intake side of the feed pump (30) communicates with the fuel supply tank (20) and the pressure side of the feed pump (30) communicates with the partial suction chamber (15), and by means of which, in a deactivation position for deactivating the cylinders (13a), the intake side of the feed pump (30) is switched by the reversing valve to communicate with the partial suction chamber (15), and the pressure side of the feed pump communicates with the fuel supply tank (20).
1 Assignment
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Accused Products
Abstract
The apparatus has a fuel injection pump with two partial suction chambers separate from one another. Fuel is delivered to the first partial suction chamber by a second feed pump. A feed pump is associated with the second partial suction chamber, and a reversing valve is disposed between the feed pump and the second partial suction chamber. To inactivate the cylinders of the engine that are associated with the second partial suction chamber, the reversing valve is reversible into a deactivation position, in which the intake side of the feed pump communicates with the second partial suction chamber and the pressure side communicates with the fuel supply tank. Fuel is thus evacuated from the second partial suction chamber by the second feed pump, so that fast inactivation of the associated cylinders is attained.
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Citations
21 Claims
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1. An apparatus for disconnecting individual cylinders of an internal combustion engine (11), having a fuel injection pump (10) that has at least two partial suction chambers (14, 15) that can be deactivated from one another and are associated with different cylinders (13a, 13b) of the engine (11), a feed pump (30) which for operation of the cylinders (13a) pumps fuel from a fuel supply tank (20) into the applicable partial suction chamber (15), wherein to deactivate the cylinders (13a) the delivery of fuel from the feed pump (30) to the applicable partial suction chamber (15) is interrupted by means of a reversing valve (31;
- 53) introduced between the feed pump (30) and the partial suction chamber (15), the reversing valve (31;
53), is in a pumping position for operation of the deactivatable cylinders (13a), the intake side of the feed pump (30) communicates with the fuel supply tank (20) and the pressure side of the feed pump (30) communicates with the partial suction chamber (15), and by means of which, in a deactivation position for deactivating the cylinders (13a), the intake side of the feed pump (30) is switched by the reversing valve to communicate with the partial suction chamber (15), and the pressure side of the feed pump communicates with the fuel supply tank (20). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
- 53) introduced between the feed pump (30) and the partial suction chamber (15), the reversing valve (31;
Specification