Method of reducing the speed of a vehicle having a collision avoidance system
First Claim
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1. A method of reducing the travelling speed of a vehicle, comprising the following steps:
- (a) providing the vehicle with a multi-cylinder, piston-type internal-combustion engine;
(b) providing the engine with a fully variably control lable valve drive;
(c) providing the vehicle with a collision avoidance system;
(d) continuously determining, by the collision avoidance system, an actual distance between the vehicle and a vehicle ahead and comparing the actual distance with a speed-dependent minimum safe distance;
(e) braking the vehicle by switching over at least one of the engine cylinders to a compressor operation when the actual distance falls below said minimum safe distance; and
(f) controlling said valve drive of said cylinder and controlling the quantity of cylinders operating as a compressor as a function of the speed at which the actual distance is reduced.
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Abstract
A method of reducing the travelling speed of a vehicle which has a multi-cylinder, piston-type internal-combustion engine, a variably controllable valve drive and a collision avoidance system includes the following steps: continuously determining, by the collision avoidance system, an actual distance between the vehicle and a vehicle ahead and comparing the actual distance with a speed-dependent minimum safe distance; and braking the vehicle by switching over at least one of the engine cylinders to a compressor operation when the actual distance falls below a minimum safe distance.
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Citations
8 Claims
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1. A method of reducing the travelling speed of a vehicle, comprising the following steps:
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(a) providing the vehicle with a multi-cylinder, piston-type internal-combustion engine; (b) providing the engine with a fully variably control lable valve drive; (c) providing the vehicle with a collision avoidance system; (d) continuously determining, by the collision avoidance system, an actual distance between the vehicle and a vehicle ahead and comparing the actual distance with a speed-dependent minimum safe distance; (e) braking the vehicle by switching over at least one of the engine cylinders to a compressor operation when the actual distance falls below said minimum safe distance; and (f) controlling said valve drive of said cylinder and controlling the quantity of cylinders operating as a compressor as a function of the speed at which the actual distance is reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of reducing the travelling speed of a vehicle, comprising the following steps:
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(a) providing the vehicle with a multi-cylinder, piston-type internal-combustion engine; (b) providing the engine with a fully variably controllable valve drive; (c) providing the vehicle with a collision avoidance system; (d) continuously determining, by the collision avoidance system, an actual distance between the vehicle and a vehicle ahead and comparing the actual distance with a speed-dependent minimum safe distance; (e) providing the vehicle with a steplessly variable gear having a transmission ratio for setting the travelling speed of the vehicle; (f) forcibly braking the vehicle by the collision avoidance system when the actual distance falls below said minimum safe distance; (g) controlling said valve drive of said cylinder and controlling the quantity of cylinders operating as a compressor as a function of the speed at which the actual distance is reduced; and (h) reducing said transmission ratio when said collision avoidance system effects a forced braking.
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Specification