Internal combustion engine and method for monitoring a tank ventilation system and a crankcase ventilation system
First Claim
1. An internal combustion engine having an intake air line, which contains both a compressor of an exhaust gas turbocharger and a throttle flap, as well as having a tank ventilation system and a crankcase ventilation system, both of which are connected to the intake air line at two connecting points upstream of the compressor and behind the throttle flap, wherein a non-return valve is mounted directly at each of the connecting points.
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Accused Products
Abstract
The invention relates to an internal combustion engine having an intake air line, which contains both a compressor of an exhaust gas turbocharger and a throttle flap, as well as having a tank ventilation system and a crankcase ventilation system, both of which are connected to the intake air line at two connecting points upstream of the compressor and behind the throttle flap. In order to make it possible to monitor the inlet points of the ventilation gases into the intake air line in a relatively simple way, the invention proposes that a non-return valve be mounted directly at each of the connecting points.
48 Citations
18 Claims
- 1. An internal combustion engine having an intake air line, which contains both a compressor of an exhaust gas turbocharger and a throttle flap, as well as having a tank ventilation system and a crankcase ventilation system, both of which are connected to the intake air line at two connecting points upstream of the compressor and behind the throttle flap, wherein a non-return valve is mounted directly at each of the connecting points.
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10. A method for monitoring a tank ventilation system and a crankcase ventilation system of an internal combustion engine, both of which are connected to an intake air line of the internal combustion engine at two connecting points upstream of a compressor of an exhaust gas turbocharger and behind a throttle flap, comprising determining a leakage between the tank ventilation system and the crankcase ventilation system, on the one hand, and the intake air line, on the other hand, by monitoring the pressure behind the throttle flap.
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11. The method for monitoring a tank ventilation system and a crankcase ventilation system of an internal combustion engine, both of which are connected to an intake air line of the internal combustion engine by means of non-return valves at two connecting points upstream of a compressor of an exhaust gas turbocharger and behind a throttle flap, comprising determining a defect or jamming of the open non-return valve that is mounted at the connecting point upstream of a compressor by monitoring the pressure behind the throttle flap.
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12. The method for monitoring a tank ventilation system and a crankcase ventilation system of an internal combustion engine, both of which are connected to an intake air line of the internal combustion engine by means of non-return valves at two connecting points upstream of a compressor of an exhaust gas turbocharger and behind a throttle flap, comprising determining a defect or jamming of the closed non-return valve that is mounted at the connecting point behind the throttle flap by a diagnosis of a tank vent valve of the tank ventilation system.
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13. The internal combustion engine having an intake conduit including a compressor of a supercharger and a throttle flap, a fuel tank ventilation system and crankcase ventilation system, a venting system comprising:
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a first conduit communication with said intake conduit at a first point upstream of said compressor, having a one-way valve disposed at said first point, allowing flow only into said intake conduit, and at a second point downstream of said throttle flap, having a one-way valve disposed at said second point, allowing flow only into said intake conduit; a second conduit intercommunicating said fuel tank ventilating system and said first conduit; and a third conduit intercommunicating said crankcase ventilating system and said first conduit. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification