Fuel additive mixing system
US4971118A · kind A · utility
Inventor
Key dates
| Filing date | Jul 21, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Jul 21, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2572
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system for metering a fuel additive into a flow of fuel into a fuel tank includes a mixing unit coupled to the filler neck of the fuel tank. The mixing unit has a body with an axial main flow passage, having a fuel inlet and a mixture outlet. The fuel inlet is dimensioned to receive the standard nozzle found on conventional service station pumps for motor fuel. The body also has an additive inlet that communicates with the main flow passage through a metering passage controlled by a metering valve. The metering valve is actuated by a pivot arm having a first end that is in the flow path of fuel flowing through the main flow passage and a second end that engages one end of a pushrod, the other end of which engages a valving element in the metering valve. The flow of fuel against the first end of the pivot arm causes the pivot arm to pivot so as to push the pushrod against the valving element to move the valving element away from its seat, against the force of a biasing spring, to open the metering valve. The metering valve is thus opened in proportion to the flow of fuel througth the main flow passage. The bias applied by the spring to the valving element can be varied to change t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.