Fuel supply system for internal combustion engines
First Claim
1. A fuel supply system for an internal combustion engine having at least one combustion chamber, comprising first fuel supply means to supply a first fuel to said combustion chamber for starting initial combustion therein, including said first fuel, and to continue to supply a limited amount of said first fuel to said combustion chamber throughout the entire operation of said engine until it is stopped, second fuel supply means to supply a second fuel to said combustion chamber during a specified and limited phase of said engine'"'"'s operation, including said second fuel, acceleration means operative to begin supply of said second fuel to said combustion chamber after said initial combustion and to thereafter accelerate and decelerate supply of said second fuel to said combustion chamber, and third fuel suuply means to supply said first fuel to said combustion chamber from said third fuel supply means for a determinable limited time period in response to said acceleration means operating to accelerate supply of said second fuel to said combustion chamber, said first fuel and said second fuel being both supplied to said combustion chamber during such determinable limited period of time, said third fuel supply means discontinuing to supply said first fuel to said combustion chamber after such determinable limited period of time.
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Accused Products
Abstract
A fuel supply system for internal combustion engines in which two different fuels are used, one to start the engine, to operate it at idling speed and to supplement the other fuel during acceleration, and the second to operate the engine at its normal working speed. The first fuel may be propane for starting, idling and for an acceleration supplement. The second fuel for normal working speed, or normal driving speed may be gasoline. A first vacuum controlled valve assembly delivers the first fuel such as propane from a pressurized supply tank to the carburetor below the conventional butterfly valve of the throttle control to start the engine and operate it at idle speed. A second vacuum controlled valve assembly delivers the first fuel, such as propane, to the carburetor above the butterfly valve only when the accelerator opens the throttle and its butterfly valve to initiate acceleration, and only during acceleration. The second fuel such as gasoline which is used for the normal working or driving operation is supplied to the engine in the usual manner, from its supply tank to the carburetor by a fuel pump, and from the carburetor through the intake manifold to the combustion chambers by the vacuum created as the engine operates.
20 Citations
10 Claims
- 1. A fuel supply system for an internal combustion engine having at least one combustion chamber, comprising first fuel supply means to supply a first fuel to said combustion chamber for starting initial combustion therein, including said first fuel, and to continue to supply a limited amount of said first fuel to said combustion chamber throughout the entire operation of said engine until it is stopped, second fuel supply means to supply a second fuel to said combustion chamber during a specified and limited phase of said engine'"'"'s operation, including said second fuel, acceleration means operative to begin supply of said second fuel to said combustion chamber after said initial combustion and to thereafter accelerate and decelerate supply of said second fuel to said combustion chamber, and third fuel suuply means to supply said first fuel to said combustion chamber from said third fuel supply means for a determinable limited time period in response to said acceleration means operating to accelerate supply of said second fuel to said combustion chamber, said first fuel and said second fuel being both supplied to said combustion chamber during such determinable limited period of time, said third fuel supply means discontinuing to supply said first fuel to said combustion chamber after such determinable limited period of time.
- 2. A fuel supply system for an internal combustion engine having at least one combustion chamber, a crankshaft, first rotation means to rotate said crankshaft prior to combustion of fuel in said combustion chamber, second rotation means to rotate said crankshaft in response to combustion of fuel in said combustion chamber, said fuel supply system comprising first fuel supply means to supply a first fuel to said combustion chamber, including said first fuel, second fuel supply means to supply a second fuel to said combustion chamber, including said second fuel, acceleration means operable to accelerate supply of fuel to said combustion chamber to accelerate rotation of said crankshaft, said first fuel means being operable to supply said first fuel to said combustion chamber for starting initial combustion therein before operation of said acceleration means and before said second fuel is supplied to said combustion chamber, said second fuel supply means being operable to begin supply of said second fuel to said combustion chamber in response to operation of said acceleration means after said initial combustion, and third fuel supply means to supply said first fuel to said combustion chamber for a determinable limited time period in response to operation of said acceleration means to accelerate supply of said second fuel to said combustion chamber and to accelerate rotation of said crankshaft, said third fuel supply means including stop means to discontinue supply of said first fuel to said combustion chamber by said third fuel supply means after said determinable limited time period.
Specification