Method for controlling an engine braking device of an internal combustion engine and an internal combustion engine for a motor vehicle
First Claim
1. A method for controlling an engine braking device (16) of an internal combustion engine (10) of a motor vehicle during an up-shift process of a transmission device (26) connected to the internal combustion engine (10), the engine having a first and a second cylinder bank (12a, 12b), an engine braking device (16) acting selectively on the first and the second cylinder banks (12a, 12b) for independently engaging or disengaging braking operation of the individual cylinder banks, the method comprising the steps of:
- a) sensing an up-shift process demand;
b) blocking the fuel supply to the first cylinder bank (12a) of the internal combustion engine (10) and simultaneouslyc) putting the first cylinder bank (12a) into braking mode by means of an engine braking device (16) acting on the first cylinder banks (12a);
d) and, at the same time, increasing the fuel supply to the second cylinder bank (12b), so as to compensate for the power loss of the first cylinder bank,e) disengaging a gear of the transmission device (26) and concurrentlyf) blocking the fuel supply to the second cylinder bank (12b) for a rapid slow down of the engine to a predetermined speed permitting upshifting, and re-powering all the cylinders.
2 Assignments
0 Petitions
Accused Products
Abstract
In a method for controlling an engine braking device of an internal combustion engine of a motor vehicle during an up-shift process of a transmission device connected to the internal combustion engine which includes a first cylinder bank and a second cylinder bank, an engine braking device acting on individual cylinder banks, a fuel supply device acting on individual cylinder banks and a shiftable transmission device, which comprises shiftable gearwheels and an input shaft which can be coupled to a crankshaft of the internal combustion engine by means of a clutch are provided and used during up-shifting to manipulate braking and powering up the cylinder banks and disengaging and up-shifting the transmission for a fast and smooth gear change operations.
5 Citations
10 Claims
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1. A method for controlling an engine braking device (16) of an internal combustion engine (10) of a motor vehicle during an up-shift process of a transmission device (26) connected to the internal combustion engine (10), the engine having a first and a second cylinder bank (12a, 12b), an engine braking device (16) acting selectively on the first and the second cylinder banks (12a, 12b) for independently engaging or disengaging braking operation of the individual cylinder banks, the method comprising the steps of:
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a) sensing an up-shift process demand; b) blocking the fuel supply to the first cylinder bank (12a) of the internal combustion engine (10) and simultaneously c) putting the first cylinder bank (12a) into braking mode by means of an engine braking device (16) acting on the first cylinder banks (12a); d) and, at the same time, increasing the fuel supply to the second cylinder bank (12b), so as to compensate for the power loss of the first cylinder bank, e) disengaging a gear of the transmission device (26) and concurrently f) blocking the fuel supply to the second cylinder bank (12b) for a rapid slow down of the engine to a predetermined speed permitting upshifting, and re-powering all the cylinders. - View Dependent Claims (2, 3, 10)
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4. A method for controlling an engine braking device (16) of an internal combustion engine (10) of a motor vehicle, the engine having a first and a second cylinder bank (12a, 12b), an engine braking device (16) acting selectively on the first and the second cylinder banks (12a, 12b) for independently engaging or disengaging braking operation of the individual cylinder banks, the method comprising, during an up-shift process of a transmission device (26) of the internal combustion engine (10), the steps of:
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a) disengaging a gear of the transmission device (26); b) blocking the supply of a fuel to the cylinders of the first and second cylinder banks (12a, 12b) of the internal combustion engine (10); and
simultaneouslyc) putting the first and second cylinder banks (12a) into braking operation by means of an engine braking device (16) acting on the first cylinder bank and the second cylinder bank; d) determining a speed difference between gearwheels of the transmission device (26) or of a crankshaft (20) of the internal combustion engine (10) and an input shaft (24) of the transmission device (26) to be shifted; and
,e) upon reaching a predetermined first target difference value of the speed difference, simultaneously f) taking the first cylinder bank (12a) out of the braking operation; g) engaging a higher gear of the transmission device (26) and h) supplying fuel to the second cylinder bank (12b). - View Dependent Claims (5)
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6. A method for controlling an engine braking device (16) of an internal combustion engine (10) of a motor vehicle, during an up-shift process of a transmission device (26) of the internal combustion engine (10) the engine having a first and a second cylinder bank (12a, 12b), an engine braking device (16) acting selectively on the first and the second cylinder banks (12a, 12b) for independently engaging or disengaging braking operation of the individual cylinder banks, the method comprising the steps of:
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a) disengaging a gear of the transmission device (26); b) blocking the supply of a fuel to the first and second cylinder bank (12a, 12b) of the internal combustion engine (10); and
simultaneouslyc) putting the first and the second cylinder bank (12a, 12b) into braking operation by means of engine braking device (16) acting on the individual cylinder banks; d) determining a speed difference between gearwheels of the transmission device (26) or of a crankshaft (20) of the internal combustion engine (10) and an input shaft (24) of the transmission device (26) by means of a speed determination device (27); e) reaching a predetermined first target difference value of the speed difference; f) taking the second cylinder bank (12b) out of the braking operation; g) reaching a predetermined second target difference value of the speed difference; h) taking the first cylinder bank (12a) out of the braking operation; i) engaging a higher gear of the transmission device (26) and j) supplying fuel to the second cylinder bank (12b). - View Dependent Claims (7, 8, 9)
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Specification