Heating system
AssigneeRobert Bosch GmbH
InventorOsami Sekine
Life of this patent
Estimating the term…
Abstract
A heating system that heats the reducing agent supplier for supplying an urea aqueous solution to an exhaust passage of the internal combustion engine in a vehicle includes: a block heater that is provided in a housing formed with a coolant circuit of the internal combustion engine and can be supplied with power of an external power supply; a coolant circulation passage that is branched from the coolant circuit, is disposed in at least a part of the reducing agent supplier, and merges with the coolant circuit again; an on-off control valve that is provided in the middle of the coolant circulation passage; a bypass passage that connects an upstream side and a downstream side of the on-off control valve; and an on-off valve that is provided in the bypass passage.
Claims7
A heating system that heats a reducing agent supplier (10) for supplying a urea aqueous solution to an exhaust passage (5) of an internal combustion engine (1) in a vehicle, the heating system comprising:
- a block heater (40) that is provided in a housing formed with a coolant circuit (4) of the internal combustion engine (1) and is configured to be supplied with power of an external power supply (90);
- a coolant circulation passage (50) that is branched from the coolant circuit (4), is disposed in at least a part of the reducing agent supplier (10), and merges with the coolant circuit (4) again;
- an on-off control valve (61) that is provided in the middle of the coolant circulation passage (50);
- a bypass passage (50ba) that connects an upstream side and a downstream side of the on-off control valve (61);
- and
- an on-off valve (63) that is provided in the bypass passage (50ba).
Dependencies are inferred from the claim text.