System for heating intake pipe of internal combustion engine
US4002025A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 29, 1975 |
| Grant date | Jan 11, 1977 |
| Priority date | — |
| Expiry date | Oct 29, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M31/163
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system for heating the intake pipe of an internal combustion engine including a combustion equipment disposed adjacent to the intake pipe, a fuel supply system for supplying the fuel into the combustion equipment and an air supply system including an air pump for charging the air into the combustion equipment, the intake pipe being heated by the heat generated by the combustion of the air-fuel mixture in the combustion equipment. The fuel supply system includes a main fuel injection nozzle and an auxiliary fuel injection nozzle which is controlled by control means so as to start or stop the fuel injection depending upon the operating conditions of the engine. When the engine is started, both the main and auxiliary fuel injection nozzles inject fuel so as to attain the rapid heating of the intake pipe, but when the temperature of the intake pipe exceeds a predetermined level, the injection by the auxiliary fuel injection nozzle is stopped. The heating system further includes a secondary air supply line interconnecting the air pump and the exhaust manifold of the engine and control means for controlling the flow rate of the secondary air in response to the negative pressure in the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.