| 摘要 |
An engine with a variable compression ratio includes a connecting rod connected to a piston, a first arm turnably connected to the connecting rod and to a crankshaft through a crankpin, a second arm integrally connected to the first arm, a control rod turnably connected to the second arm, and a displaceable support shaft for supporting the other end of the control rod for turning movement. In the engine, a displacement Vhpiv0 and a compression ratio epsilon piv0 at the time when the support shaft is in any first position and a displacement Vhpiv1 and a compression ratio epsilon piv1 at the time when the support shaft is in a second position displaced from the first position are determined, and a relation, Vhpiv1 > Vhpiv0 is satisfied when epsilon piv1 < epsilon piv0, and a relation, Vhpiv1 < Vhpiv0 is satisfied when epsilon piv1 > epsilon piv0. <IMAGE>An engine with a variable compression ratio includes a connecting rod connected to a piston, a first arm turnably connected to the connecting rod and to a crankshaft through a crankpin, a second arm integrally connected to the first arm, a control rod turnably connected to the second arm, and a displaceable support shaft for supporting the other end of the control rod for turning movement. In the engine, a displacement Vhpiv0 and a compression ratio epsilon piv0 at the time when the support shaft is in any first position and a displacement Vhpiv1 and a compression ratio epsilon piv1 at the time when the support shaft is in a second position displaced from the first position are determined, and a relation, Vhpiv1 > Vhpiv0 is satisfied when epsilon piv1 < epsilon piv0, and a relation, Vhpiv1 < Vhpiv0 is satisfied when epsilon piv1 > epsilon piv0. <IMAGE>
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