Internal-combustion engines – With heating means
Patent
1984-03-30
1985-08-06
Lazarus, Ronald H.
Internal-combustion engines
With heating means
1231425R, F02N 1702
Patent
active
045328943
ABSTRACT:
A heating system for a dual-mode vehicle, such as a bus equipped with both electrical and internal combustion engine drive systems, is provided with an electrically powered heat exchanger and an auxiliary fuel heater serially connected in the engine cooling water flow line. The electric heat exchanger provides a non-polluting source of heat for the vehicle's interior within electrified portions of the drive route. The auxiliary heater supplies heat when the vehicle is standing (i.e., parked) with the engine shut off in non-electrified portions of the route. An electric water pump is also connected in series with the electric and fuel heaters. During periods of electric drive operation, the electric heater is activated when the engine cooling water temperature falls below a predetermined level even if no heat is required for the vehicle interior. The electric heater prevents the engine from cooling off and, thus, improves exhaust gas characteristics, from an environmental viewpoint, when the engine is re-started.
REFERENCES:
patent: 2440369 (1948-04-01), Furman
patent: 4258676 (1981-03-01), Lamm
patent: 4405029 (1983-09-01), Hunt
patent: 4424775 (1984-01-01), Mayfield
Baehrle Friedrich
Wulf Helmut
Daimler-Benz Aktiengesellschaft
Lazarus Ronald H.
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