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US 4,516,539 AGranted
Internal combustion engine
OwnerJohn F. Andreeninventor
Life of this patent
Estimating the term…
Abstract
An internal combustion engine having a pair of opposed ignition pistons and a pump element that reciprocates coaxially in opposition to the pistons. A pair of counterbalance arms are linked to the pump element to also reciprocate in opposition to the pistons. A counterbalance linkage includes rocker arms which are pivotally connected to the housing and which are pivotally and slidably connected to the pump element and the pistons. The engine includes a pair of opposed combustion pistons which reciprocate in synchronism with the ignition pistons and a manifold supplies an ignited fuel/air charge from the ignition to the combustion pistons.
Claims22
An internal combustion engine comprising:
- an engine housing having a first piston cylinder;
- a first piston mounted for reciprocation in said first cylinder;
- counterbalance arm means pivotally coupled to said housing for pivotal movement and for counterbalancing said first piston, said counterbalancing arm means including a counterbalance head;
- a first pump means for reciprocating within said housing in opposition to said first piston for forcing an uncombusted charge into said first cylinder after said first piston has withdrawn from the ignition of a previous charge;
- and
- linkage means for coupling said first piston to said counterbalance arm for reciprocation by said pivotal movement of said counterbalance arm and for coupling said first pump means to said counterbalance arm means for reciprocation by said pivotal movement of said counterbalance arm, such that said pump means and said counterbalance head reciprocate in opposition to the reciprocation of said first piston.
3 more elements
An internal combustion engine comprising:
- an engine housing including an ignition cylinder and a combustion cylinder;
- a first combustion piston reciprocatably mounted within said combustion cylinder;
- a first ignition piston reciprocatably mounted within said ignition cylinder;
- means for transferring an ignited charge from said ignition cylinder into said combustion cylinder to ignite a compressed charge in the combustion cylinder;
- pump means within said ignition cylinder including a pump element moving in opposition to the reciprocation of said ignition piston for forcing an uncombusted charge into said ignition cylinder after said ignition piston has withdrawn from the ignition of a previously charge, said pump element being mounted within said ignition cylinder to reciprocate coaxially with said first ignition piston;
- a second ignition piston coaxially aligned with said first ignition piston, said pump means being reciprocatably mounted between said first and second ignition pistons and reciprocating in opposition to said first and second ignition pistons;
- a second combustion piston coaxially aligned with said first combustion piston;
- lever means pivotally mounted on said housing and coupled to said pump means for reciprocating said pump means;
- and
- combustion piston reciprocating means coupled to said lever means and to said combustion pistons for reciprocatably pivoting said lever means.
7 more elements
An internal combustion engine comprising:
- an engine housing having a first piston cylinder;
- a first piston mounted for reciprocation in said first cylinder;
- counterbalance arm means pivotally coupled to said housing for counterbalancing said first piston including a counterbalance head;
- a first pump means for reciprocating within said housing in opposition to said first piston for forcing an uncombusted charge into said first cylinder after said first piston has withdrawn from the ignition of a previous charge;
- linkage means coupling said first piston and said first pump means to said counterbalance arm means such that said pump means and said counterbalance head reciprocate in opposition to the reciprocation of said first piston;
- a drive shaft rotatably mounted to said housing and including eccentric drive means;
- a connecting rod having one end coupled to said eccentric drive means and an opposite end linked to said counterbalance arm means, whereby pivotal reciprocation of said counterbalance arm means is translated by said connecting rod and eccentric drive means into rotational motion of said drive shaft;
- a second cylinder and a second piston coaxially aligned with said first piston and mounted in said second cylinder to reciprocate with said first piston;
- a second pump means for reciprocating within said housing in opposition to said second piston for forcing an uncombusted charge into said cylinder after the second piston has withdrawn from the ignition of a previous charge;
- and
- said first pump means including a first pump element and said second pump means including a second pump element, said first and second pump elements being linked together and coaxially aligned with each other and with said first and second pistons, said first and second pump elements mounted in said housing to reciprocate between said first and second pistons.
8 more elements
The engine as defined in claim 10 and further comprising:
- combustion cylinder means formed in said housing;
- a pair of coaxially aligned combustion pistons having a diameter larger than the diameter of said first and second pistons, said combustion pistons being reciprocatably mounted in said combustion cylinder means;
- and
- a rocker arm coupled to said first and second pistons, said rocker arm being pivotally coupled to said counterbalance arm means, whereby said counterbalance arm means pivot in opposition to said rocker arm.
1 more element
An internal combustion engine comprising:
- an engine housing defining an ignition cylinder and a combustion cylinder;
- a first combustion piston reciprocatably mounted within said combustion cylinder;
- a first ignition piston reciprocatably mounted within said ignition cylinder;
- means for transferring an ignited charge from said ignition cylinder into said combustion cylinder to ignite a compressed charge in the combustion cylinder;
- pump means within said ignition cylinder and including a pump element moving in opposition to the reciprocation of said ignition piston for forcing an uncombusted charge into said ignition cylinder after said ignition piston has withdrawn from the ignition of a previous charge;
- lever means pivotally mounted on said housing for reciprocating said pump means;
- and
- means coupled to said combustion piston and to said lever means for reciprocating said lever means.
5 more elements
An internal combustion engine comprising:
- an engine housing including a first cylinder;
- a first piston coupled to a first piston rod for reciprocation in said first cylinder;
- a first pump element coupled to a first reciprocating rod for reciprocating said pump element in said first cylinder;
- a first rocker arm pivotally mounted and first pivot means mounting said first rocker arm to said housing, said first reciprocating rod pivotally mounted to said first rocker arm by a second pivot means spaced from said first pivot means;
- a second rocker arm pivotally mounted at one end to said first rocker arm by third pivot means disposed between said first and second pivot means, said first piston rod being pivotally mounted to said second rocker arm by fourth pivot means spaced from said third pivot means;
- a linking element pivotally mounted to said housing at one end and pivotally mounted at an opposite end to said second rocker arm by fifth pivot means disposed between and permitting translational as well as pivotal movement of said fifth pivot means, said third pivot means and said fourth pivot means;
- first translational means for moving said second pivot means toward and away from said first pivot means;
- and
- second translational means for moving said fourth pivot means toward and away from said third pivot means, whereby said first piston and said first pump surface reciprocate parallel to and in opposition to each other.
6 more elements
An internal combustion engine comprising:
- an engine housing defining first and second cylinders;
- a first and second piston reciprocatably mounted within said first and second cylinders;
- a first yoke linked to said first piston and a second yoke linked to said second piston, each yoke having one end pivotally mounted in said housing to pivotally reciprocate with the reciprocation of said pistons, said yokes extending generally toward one another;
- means for coupling together the ends of said first and second yokes opposite said one ends for a sliding, pivotal coupling interlinking said first and second pistons;
- and
- said first yoke including a first pair of legs and said second yoke including a second pair of legs, said coupling means including a crossbar having an aperture therethrough rotatably secured between said first legs and a sliding bar secured between said second legs, said sliding bar being generally aligned with said second legs and slidably received in said crossbar aperture.
3 more elements
Dependencies are inferred from the claim text.