Hi people. I found a solution using WorkflowProcessInstance. Here is the code:
Map<String, Object> params2 = new HashMap<String, Object>();
params2.put("valor", 20000);
ProcessInstance pi = ksession.startProcess("com.ims.teste.requisicao", params2);
WorkflowProcessInstance wfi = (WorkflowProcessInstance)pi;
System.out.println(wfi.getVariable("valor"));
Thank you.
Regards