• when
  • I configure an engine with not "default" name and it's the only engine
• then
  • I can inject it in delegate
  • I can see it's name set properly

@Inject
private ProcessEngine processEngine;

Hint

see implementation of org.camunda.bpm.engine.cdi.impl.ProcessEngineServicesProducer it has default engine hardcoded, but if there is only one engine configured, it should probably recognize that only engine as default.